AMERISOURCE DISTRIBUTION CORP
424B1, 1995-04-04
DRUGS, PROPRIETARIES & DRUGGISTS' SUNDRIES
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<PAGE>   1
                                                FILED PURSUANT TO RULE 424(b)1
                                                REGISTRATION NO. 33-57513

 
PROSPECTUS
 
APRIL 4, 1995
 
                                6,600,000 SHARES
 
                               [AMERISOURCE LOGO]
                                  COMMON STOCK
 
     All of the shares of Common Stock, par value $0.01 per share ("Common
Stock"), offered hereby are being offered by AmeriSource Health Corporation
("AmeriSource" or the "Company"). Of the 6,600,000 shares of Common Stock being
offered, 5,280,000 shares are being offered for sale in the United States and
Canada by the U.S. Underwriters (the "U.S. Offering") and 1,320,000 shares are
being offered for sale outside the United States and Canada in a concurrent
offering by the International Managers (the "International Offering" and,
together with the U.S. Offering, the "Offering"). The initial public offering
price and the underwriting discount per share are the same for both the U.S.
Offering and the International Offering. The class of Common Stock being offered
hereby is the only voting stock of the Company. There are three classes of
Company Common Stock, two of which are non-voting.
 
     Prior to the Offering, there has been no public market for the Common
Stock. See "Underwriting" for information relating to the factors to be
considered in determining the initial public offering price.
 
     The Common Stock is traded on the Nasdaq National Market under the symbol
"ASHC."
 
    SEE "RISK FACTORS" FOR CERTAIN INFORMATION THAT SHOULD BE CONSIDERED BY
                             PROSPECTIVE INVESTORS.
 
THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
  EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE
     SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION
       PASSED UPON THE ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY
       REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.
- --------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                                                  PRICE            UNDERWRITING          PROCEEDS
                                                  TO THE          DISCOUNTS AND           TO THE
                                                  PUBLIC          COMMISSIONS(1)        COMPANY(2)
<S>                                         <C>                 <C>                 <C>
- ------------------------------------------------------------------------------------------------------
Per Share.................................        $21.00              $1.31               $19.69
Total(3)..................................     $138,600,000         $8,662,500         $129,937,500
</TABLE>
 
- --------------------------------------------------------------------------------
 
(1) See "Underwriting" for indemnification arrangements with the Underwriters.
 
(2) Before deducting expenses payable by the Company estimated at $1,000,000.
 
(3) The Company has granted the U.S. Underwriters a 30-day option to purchase up
    to 990,000 additional shares of Common Stock on the same terms as set forth
    above to cover over-allotments, if any. If such option is exercised in full,
    the total Price to the Public, Underwriting Discounts and Commissions and
    Proceeds to the Company will be $159,390,000, $9,961,875 and $149,428,125,
    respectively. See "Underwriting."
 
     The shares of Common Stock are being offered by the several Underwriters
named herein, subject to prior sale, when, as and if accepted by the
Underwriters and subject to various prior conditions including their right to
reject orders in whole or in part. It is expected that delivery of the
certificates for the shares of Common Stock offered hereby will be made in New
York, New York on or about April 10, 1995.
 
DONALDSON, LUFKIN & JENRETTE
      SECURITIES CORPORATION
 
                               SMITH BARNEY INC.
                                                       BT SECURITIES CORPORATION
<PAGE>   2
 
                             [MAP OF UNITED STATES]




                NORTH CENTRAL REGION                    NORTHEAST REGION
                Mishawaka, IN                           Thorofare, NJ
                Toledo, OH                              Springfield, MA
                                                        Harrisburg, PA
                MID CENTRAL REGION                      Baltimore, MD
                Columbus, OH
                Louisville, KY                          SOUTHERN REGION
                                                        Chattanooga, TN
                WESTERN REGION                          Valdosta, GA
                Minneapolis, MN                         Johnson City, TN
                Portland, OR                            Dallas, TX
                Joplin, MO                              Lynchburg, VA
                Sacramento, CA*                         Orlando, FL*

                SOUTH CENTRAL REGION                    CORPORATE OFFICE
                Paducah, KY                             Malvern, PA
 
- ---------------
* Announced opening of new facility.





 
     IN CONNECTION WITH THE OFFERING, THE UNDERWRITERS MAY OVER-ALLOT OR EFFECT
TRANSACTIONS WHICH STABILIZE OR MAINTAIN THE MARKET PRICE OF THE COMMON STOCK OF
THE COMPANY AT A LEVEL ABOVE THAT WHICH MIGHT OTHERWISE PREVAIL IN THE OPEN
MARKET. SUCH TRANSACTIONS MAY BE EFFECTED IN THE OVER-THE-COUNTER MARKET OR
OTHERWISE. SUCH STABILIZING, IF COMMENCED, MAY BE DISCONTINUED AT ANY TIME.
 
                                        2
<PAGE>   3
 
                               PROSPECTUS SUMMARY
 
     The following summary is qualified in its entirety by the more detailed
information and the financial statements, including the notes thereto, included
elsewhere or incorporated by reference in this Prospectus. Investors should
carefully consider the information set forth under the heading "Risk Factors."
All industry statistics in this Prospectus were obtained from data prepared by
the National Wholesale Druggists' Association. Unless otherwise indicated, all
references in this Prospectus to the Company or AmeriSource shall mean the
Company and its subsidiaries on a consolidated basis.
 
                                  THE COMPANY
 
     AmeriSource is the fifth largest full-service wholesale distributor of
pharmaceutical products and related health care services in the United States.
The Company services its customers nationwide through 16 drug distribution
facilities and one specialty products distribution facility. AmeriSource is
typically the primary source of supply to its customers and offers a broad range
of services designed to enhance the operating efficiencies and competitive
position of its customers and suppliers. The Company benefits from a diverse
customer base that includes hospitals and managed care facilities (46%),
independent community pharmacies including retail drug stores, nursing homes and
clinics (34%) and chain drug stores including pharmacy departments of
supermarkets and mass merchandisers (20%).
 
     Over the past five years, AmeriSource has significantly expanded its
national presence as a leading, innovative wholesale distributor, and has
achieved significant growth in revenues and adjusted operating income (as
defined herein). The Company's revenues have increased from $2.6 billion in
fiscal 1990 to $4.3 billion in fiscal 1994, a compound annual growth rate of
13.8%, while adjusted operating income increased from $43.8 million in fiscal
1990 to $86.1 million in fiscal 1994, a compound annual growth rate of 18.4%.
The Company's growth is primarily the result of market share gains in existing
markets, geographic expansion and overall industry growth. The Company believes
it is well-positioned to continue its revenue growth and increase operating
income through the execution of the following key elements of its business
strategy:
 
     - Expanding into New Geographic Markets.  The Company believes that there
      are substantial opportunities to grow by expanding into new geographic
      areas through opening new distribution facilities and making selective,
      complementary acquisitions. During the past 17 months, AmeriSource has
      opened three new distribution facilities in Dallas, Texas, Portland,
      Oregon and Springfield, Massachusetts. The Company plans to open new
      distribution facilities in Sacramento, California and Orlando, Florida
      during calendar 1995. In addition, the Company believes that as industry
      consolidation pressures continue, opportunities will arise to selectively
      acquire local and regional drug wholesale companies. Prior to the
      Acquisition (as defined herein) in 1988, AmeriSource's management team
      completed 18 acquisitions over a 10-year period. The completion of the
      Offering and the Refinancing (as defined herein) will significantly
      increase the Company's financial flexibility, including its ability to
      pursue acquisitions.
 
     - Increasing Market Share in Existing Markets.  The Company believes that
      it is well positioned to continue to grow in its existing markets by: (i)
      providing superior distribution services and specialty value-added
      programs which reduce its customers' cost of operations; (ii) maintaining
      its low cost operating structure to ensure that the Company's services are
      priced competitively in the marketplace; (iii) continuing to focus on the
      higher growth hospital and managed care market segment through the use of
      dedicated facilities and advanced information systems; and (iv)
      maintaining a decentralized operating structure which responds to
      customers' needs more quickly and efficiently and ensures the continued
      development of local and regional management talent. These factors have
      allowed AmeriSource to compete effectively in the marketplace, generate
      above-average industry sales growth over the last three years and develop
      new types of customers, such as the federal government.
 
     - Continuing Growth of Specialty Services.  AmeriSource works closely with
      both customers and suppliers to develop an extensive range of specialty
      services. In addition to enhancing the Company's
 
                                        3
<PAGE>   4
 
      profitability, these services increase customer loyalty and strengthen the
      Company's overall role in the health care distribution channel. These
      services include:
 
          -- ECHO(TM), the Company's proprietary software system, provides
             sophisticated ordering and inventory management assistance to its
             hospital and retail customers. Since the introduction of ECHO(TM)
             in early fiscal 1991, the Company has installed approximately 2,000
             systems nationwide and believes that its installed base of systems
             is one of the largest in the wholesale drug industry.
 
          -- Family Pharmacy(R) enables small chain and independent community
             pharmacies to compete more effectively by providing innovative
             marketing and merchandising programs and enhancing access to
             pharmaceutical benefit programs of large health care provider
             groups. Family Pharmacy(R) has grown dramatically in recent years,
             and as of December 31, 1994 its 1,861 member-stores would in effect
             constitute one of the largest drugstore chains in the United
             States.
 
          -- Income Rx(R) provides an integral value-added service to hospital
             and retail customers by continually reviewing the marketplace for
             generic pharmaceutical products that offer the best price, quality
             and availability. In addition, Income RePax(R) repackages
             pharmaceuticals from bulk quantities into smaller units thereby
             providing customers with lower product, inventory and dispensing
             (labor) costs.
 
          -- Health Services Plus distributes oncology and other specialty
             products to clinics and physician groups on a national basis. Rita
             Ann Distributors markets cosmetics and fragrances to chain
             drugstores and other retail customers.
 
     - Maintaining Low Cost Operating Structure.  AmeriSource has the lowest
       operating cost structure among its four major national competitors. Over
       the past six years, the Company has reduced its selling and
       administrative expenses as a percentage of revenues from 5.36% in fiscal
       1988 to 3.31% in fiscal 1994. The Company continues to achieve
       productivity and operating income gains from ongoing investments in
       advanced management information systems and warehouse automation
       technology, and from operating leverage due to above industry average
       volume per facility. In fiscal 1994, the Company's average revenue per
       facility was $287 million compared to a calendar 1993 industry average of
       approximately $175 million.
 
     The wholesale drug industry in the United States continues to experience
significant growth. Industry sales grew from $30 billion in 1990 to an estimated
$53 billion in 1994. Factors contributing to this growth include an aging
population, new product introductions, the increased use of outpatient drug
therapies, a higher concentration of distribution through wholesalers by both
manufacturers and customers and rising pharmaceutical prices. In response to
rising health care costs, governmental and private payors have adopted cost
containment measures that encourage the use of efficient drug therapies to
prevent or treat diseases instead of expensive prolonged hospital stays and
surgical procedures. In addition, drug wholesalers offer their customers and
suppliers more efficient distribution and inventory management. As a result,
from 1980 to 1994, the percentage of total pharmaceutical sales through
wholesale drug distributors increased from approximately 57% to approximately
78%. The industry also continues to undergo significant consolidation, with the
number of wholesalers in the continental United States down from 139 at the end
of 1980 to approximately 55 as of December 31, 1994.
 
     After giving effect to the Offering and the Option Exercises (as defined
herein), the outstanding Common Stock of the Company will be owned 47.2% by 399
Venture Partners Inc., a wholly-owned indirect subsidiary of Citicorp ("VPI"),
and 12.8% by management level employees of the Company (45.1% and 12.2%,
respectively, if the over-allotment option is exercised in full). See
"Management" and "Principal Stockholders." The Company was formed to acquire
Alco Health Services Corporation, a public company listed on Nasdaq, in 1988
through a leveraged buyout (the "Acquisition"). The Company changed its name
from Alco Health Distribution Corporation on July 15, 1994. The address of the
principal executive office of the Company is 300 Chester Field Parkway, Malvern,
Pennsylvania 19355, and its telephone number is (610) 296-4480.
 
     In connection with the Acquisition, the Company incurred approximately $545
million of indebtedness, with a resulting high level of interest expense. Due to
its high leverage, the Company has experienced
 
                                        4

<PAGE>   5
 
significant net losses in each fiscal year since 1988. The Company had net
losses of approximately $29.5 million, $23.3 million, $6.5 million, $18.6
million and $207.7 million during fiscal years 1990, 1991, 1992, 1993 and 1994,
respectively. During this period, the Company's gross profit percentage
decreased from 6.32% in fiscal 1990 to 5.47% in fiscal 1994. Since the
Acquisition, the Company has refinanced all such indebtedness at substantially
lower interest rates. See "Risk Factors," "The Refinancing" and
"Capitalization." The Company recorded approximately $209.0 million of goodwill
at the time of the Acquisition in 1988. After a detailed evaluation of the
recoverability of its goodwill, the Company wrote-off its remaining goodwill
balance of $179.8 million in the quarter ended June 30, 1994. See "Management's
Discussion and Analysis of Financial Condition and Results of
Operations -- Liquidity and Capital Resources" and the audited consolidated
financial statements and related notes thereto included elsewhere in this
Prospectus.
 
                                  THE OFFERING
 
Common Stock offered hereby.................    6,600,000 shares
 
Common Stock to be outstanding after the
Offering(1).................................    21,212,111 shares
 
Use of Proceeds.............................    For repayment of indebtedness
                                                and general corporate purposes.
                                                See "Use of Proceeds."
 
Nasdaq National Market Symbol...............    ASHC
 
- ---------------
(1) Includes 1,293,820 shares to be outstanding as a result of the Option
     Exercises and does not include up to approximately 1.1 million shares of
     Common Stock reserved for issuance upon exercise of options available for
     future grant under the Company's 1995 Stock Option Plan (as defined herein)
     and Directors Plan (as defined herein), which is equivalent to 5% of all
     shares after giving effect to the Offering and the Option Exercises and is
     subject to an increase of approximately 50,000 shares if the over-allotment
     option is exercised in full. See "Management -- Stock Options" and
     "Description of Capital Stock."
 
                                        5
<PAGE>   6
 
                                  RISK FACTORS
 
     See "Risk Factors" for a discussion of certain factors that should be
considered by prospective investors.
 
                            ------------------------
 
     Unless otherwise indicated, the information in this Prospectus assumes that
the Underwriters' over-allotment option will not be exercised. Unless otherwise
indicated, solely for the purposes of disclosure in this Prospectus, all share
amounts and information derived therefrom have been adjusted to reflect: (i) the
2.95-for-1 stock split declared in connection with the sale of Common Stock
offered hereby; (ii) the issuance of 2,571,478 shares of Common Stock currently
reserved for issuance upon the exercise of options under the Purchase Plan (as
defined herein) and the 1991 Option Plan (as defined herein), which options will
expire 90 days after the closing of the Offering and which the Company expects
will be exercised during such period and AmeriSource's subsequent repurchase of
168,127 shares of Common Stock from the Purchase Plan and the 1991 Option Plan
option holders to enable the holders to satisfy certain tax withholding
obligations, and the exercise of options in December 1994 for 336,448 shares of
Common Stock under the Partners Plan (as defined herein) and AmeriSource's
subsequent repurchase of 107,085 shares of Common Stock from Partners Plan
option holders to enable them to satisfy certain tax withholding obligations;
and (iii) the Company's expected repurchase from VPI of 1,338,894 shares of
Common Stock upon the exercise of options under the Purchase Plan and the 1991
Option Plan at a price of $0.34 per share. The transactions contemplated by
clauses (ii) and (iii) above are collectively referred to herein as the "Option
Exercises." The term "Common Stock" referred to in this Prospectus is the Class
A Common Stock, $0.01 par value per share, Class B Common Stock, $0.01 par value
per share and Class C Common Stock, $0.01 par value per share of the Company.
The Class A Common Stock is the Company's only class of voting stock. Unless
otherwise indicated, the Company's historical earnings (loss) per share data and
weighted average common shares outstanding as presented in the Summary Financial
Data and Selected Financial Data have been restated for the 2.95-for-1 stock
split declared in connection with the Offering.
 
                                        6
<PAGE>   7
 
                             SUMMARY FINANCIAL DATA
 
    The summary financial data should be read in conjunction with "The
Refinancing," "Use of Proceeds," "Capitalization," "Selected Financial Data,"
"Management's Discussion and Analysis of Financial Condition and Results of
Operations," the audited and unaudited consolidated financial statements and
related notes thereto, and the unaudited pro forma financial statements and
related notes included elsewhere in this Prospectus. The information for interim
periods is unaudited; however, in the opinion of management, all adjustments
(consisting only of normal recurring adjustments) necessary for a fair
presentation of such information have been included. The interim results of
operations may not be indicative of the results for the full fiscal year.
 
<TABLE>
<CAPTION>
                                                                                                        THREE MONTHS ENDED
                                                   FISCAL YEAR ENDED SEPTEMBER 30,                         DECEMBER 31,
                                    --------------------------------------------------------------    -----------------------
                                       1990         1991         1992         1993         1994          1993         1994
                                                        (DOLLARS IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)
<S>                                 <C>          <C>          <C>          <C>          <C>           <C>          <C>
STATEMENT OF OPERATIONS DATA:
  Revenues........................  $2,564,008   $2,827,161   $3,329,909   $3,719,025   $4,301,832    $1,045,776   $1,157,100
  Gross profit....................     162,120      178,769      199,723      209,438      235,191        53,999       63,237
  Selling and administrative
    expenses......................     113,586      116,044      125,696      130,338      142,497        33,034       39,598
  Write-off of excess of cost over
    net assets acquired(1)........          --           --           --           --      179,824            --           --
  Operating income (loss)(2)......      38,270       46,838       63,094       67,824     (101,992)       18,000       21,939
  Interest expense................      73,675       72,208       71,025       66,696       62,611        15,233       17,323
  Income (loss) before
    extraordinary items and
    cumulative effects of
    accounting changes............     (29,489)     (23,319)     (12,824)      (7,474)    (172,417)        2,579          886
  Net (loss)......................     (29,489)     (23,319)      (6,476)     (18,618)    (207,671)      (32,675)     (10,863)
EARNINGS (LOSS) PER SHARE(3):
  Income (loss) before
    extraordinary items and
    cumulative effects of
    accounting changes............  $    (2.00)  $    (1.58)  $    (0.87)  $    (0.51)  $   (11.69)   $      .18   $      .06
  Extraordinary items.............          --           --         0.43        (0.75)       (0.04)         (.04)        (.80)
  Cumulative effects of accounting
    changes.......................          --           --           --           --        (2.35)        (2.35)          --
                                    ----------   ----------   ----------   ----------   ----------    ----------   ----------
  Net (loss)......................  $    (2.00)  $    (1.58)  $    (0.44)  $    (1.26)  $   (14.08)   $    (2.21)  $     (.74)
                                    ==========   ==========   ==========   ==========   ==========    ==========   ==========
  Weighted average common shares
    outstanding...................      14,750       14,750       14,750       14,750       14,750        14,750       14,750
PRO FORMA DATA(4):
  Adjusted operating income(5)....                                                      $   86,054    $   19,376   $   21,939
  Interest expense................                                                          33,069         8,283       10,632
  Income (loss) before taxes,
    extraordinary items and
    cumulative effects of
    accounting changes............                                                        (135,061)        9,717       11,307
  Income (loss) before
    extraordinary items and
    cumulative effects of
    accounting changes............                                                        (151,254)        7,512        5,172
  Income (loss) per share before
    extraordinary items and
    cumulative effects of
    accounting changes............                                                      $    (7.13)   $      .35   $      .24
  Weighted average common shares
    outstanding...................                                                          21,212        21,212       21,212
OTHER OPERATING DATA:
  Adjusted operating income(5)....  $   43,815   $   57,848   $   68,643   $   73,291   $   86,054    $   19,376   $   21,939
  Adjusted operating income as a %
    of revenues...................        1.71%        2.05%        2.06%        1.97%        2.00%         1.85%        1.90%
  Number of facilities at end of
    period........................          19           19           18           16           15            17           17
  Average revenue per facility....  $  134,948   $  148,798   $  184,995   $  232,439   $  286,789            --           --
</TABLE>
 
<TABLE>
<CAPTION>
                                                                                             AT DECEMBER 31, 1994
                                                                                          --------------------------
                                                                                           ACTUAL     AS ADJUSTED(6)
                                                                                                (IN THOUSANDS)
<S>                                                                                       <C>         <C>
BALANCE SHEET DATA:
  Current assets........................................................................  $ 855,867     $  855,867
  Working capital.......................................................................    298,499        325,211
  Total assets..........................................................................    915,727        913,440
  Long-term debt, including current portion.............................................    664,807        564,279
  Stockholders' equity (deficit)........................................................   (312,745)      (187,792)
</TABLE>
 
- ---------------
(see footnotes on the following page)
 
                                        7
<PAGE>   8
 
- ---------------
(1) During the quarter ended June 30, 1994, the Company wrote off the remaining
    unamortized balance of its excess of cost over net assets acquired
    ("goodwill") of $179.8 million. See "Management's Discussion and Analysis of
    Financial Condition and Results of Operations" and Note 2 to the audited
    consolidated financial statements included elsewhere in this Prospectus.
 
(2) Excludes non-recurring charges as shown in the Selected Financial Data.
    Operating income is presented to assist the investor in evaluating the
    Company's results of operations before financing costs and in the case of
    adjusted operating income, before non-recurring charges. See "Management's
    Discussion and Analysis of Financial Condition and Results of Operations"
    and Note 9 to the audited consolidated financial statements included
    elsewhere herein for an explanation of the charges in 1992 and 1993.
 
(3) Earnings (loss) per share represents the Company's historical per share data
    and weighted average common shares outstanding restated to reflect the
    2.95-for-1 stock split declared in connection with the Offering.
 
(4) The pro forma data represents the historical data for the fiscal year ended
    September 30, 1994 and the three months ended December 31, 1994 and 1993
    adjusted to give effect to the Refinancing, the Offering and the Option
    Exercises as if each transaction had occurred at the beginning of the
    periods presented. See "Use of Proceeds," "The Refinancing" and the
    unaudited pro forma financial statements including notes thereto, included
    elsewhere in this Prospectus.
 
(5) Adjusted operating income is defined as operating income plus amortization
    of intangibles for each period plus a $5.5 million stock option compensation
    charge in fiscal 1991, a $4.1 million environmental remediation charge in
    fiscal 1994 and the $179.8 million write-off of goodwill in the quarter
    ended June 30, 1994. Adjusted operating income is not an alternative to
    operating income or cash flows (as determined under generally accepted
    accounting principles) as an indicator of operating and cash flow
    performance and should be read in conjunction with the Selected Financial
    Data and the Company's consolidated financial statements included elsewhere
    in this Prospectus. The Company believes adjusted operating income provides
    investors with an evaluation of the Company's historical results of
    operations on a comparable basis, since the unusual items noted above were
    incurred in some historical periods, but not in others. The presentation of
    adjusted operating income should not be interpreted to suggest that the
    Company will not incur similar unusual items in the future, although none
    are currently anticipated.
 
(6) Represents the historical data as of December 31, 1994 adjusted to give
    effect to the Refinancing, the Offering and the Option Exercises as if each
    transaction had occurred on December 31, 1994. See "Use of Proceeds," "The
    Refinancing," and the unaudited pro forma financial statements including
    notes thereto, included elsewhere in this Prospectus.
 
                                        8
<PAGE>   9
 
                                  RISK FACTORS
 
     Prospective purchasers of the Common Stock offered hereby should consider
carefully the specific factors set forth below as well as the other information
set forth elsewhere and incorporated by reference in this Prospectus.
 
HISTORY OF NET LOSSES
 
     The Company has reported significant net losses since the Acquisition. The
Company had a net loss of approximately $10.9 million in the first quarter of
fiscal year 1995 (which included an extraordinary charge of $11.7 million
related to the Refinancing) and a net loss for fiscal year 1994 of approximately
$207.7 million (which included a one-time charge of $33.4 million relating to
changes in accounting for income taxes). In addition, the Company's net loss for
fiscal year 1994 included a write-off of its remaining goodwill balance of
$179.8 million in the quarter ended June 30, 1994. As discussed in "Management's
Discussion and Analysis of Financial Condition and Results of Operations," as
part of its evaluation of the recoverability of its goodwill during early 1994,
the Company determined that its projected operating results were being adversely
impacted by competition for market share, health care industry consolidation and
the impact on drug prices of group purchasing organizations, managed care and
health care reform. As part of that evaluation process, the Company's
projections indicated that its long-term viability would require modification of
its capital structure to reduce indebtedness and increase equity in the near-to
mid-term. In the first quarter of fiscal 1995, the Company effected the
Refinancing. After giving effect thereto and to the Offering, pro forma interest
expense for fiscal 1994 would have been approximately $33.1 million. There are
no scheduled principal payments of any of the Company's indebtedness until
January 3, 2000. The Receivables Program (as defined herein) is expected to
liquidate beginning in October 1999. See "The Refinancing" and "Management's
Discussion and Analysis of Financial Condition and Results of Operations."
 
FINANCIAL LEVERAGE
 
     As of December 31, 1994, the Company's aggregate long-term indebtedness was
$664.8 million and its stockholders' deficit was $312.7 million. After giving
effect to the Refinancing and the Offering, on a pro forma basis as of December
31, 1994, the Company's aggregate long-term indebtedness would have been
approximately $564.3 million. Although the application of the proceeds of the
Offering will reduce the Company's indebtedness, the terms of the Company's
financing agreements contain numerous financial and operating covenants and
prohibitions, including requirements that the Company satisfy certain financial
ratios and maintain certain specified levels of net worth. In addition, the
Company is more highly leveraged than certain of its competitors, which may
place the Company at a competitive disadvantage. See "Capitalization" and
"Management's Discussion and Analysis of Financial Condition and Results of
Operations."
 
     The degree to which the Company is leveraged could have important
consequences to stockholders of the Company, including the following: (i) the
Company could be more vulnerable to changes in general economic conditions; (ii)
the Company's ability to obtain additional financing for working capital,
capital expenditures, acquisitions, general corporate purposes or other purposes
may be impaired; (iii) a significant portion of the Company's cash flow from
operations must be dedicated to the payment of interest and, after 1999, the
principal on the Company's indebtedness; (iv) the Amended and Restated Credit
Agreement dated December 13, 1994 among the Company and its senior lenders (the
"Credit Agreement") and the Indenture (the "Issuer Indenture") relating to the
Company's 11 1/4% Senior Debentures due 2005 (the "Senior Debentures") contain
restrictions on the payment of dividends and impose other operating and
financial restrictions; (v) the Company's ability to generate or service
receivables pursuant to the Receivables Program may be impaired; and (vi)
certain of the Company's borrowings are at a floating rate of interest, which
causes the Company to be more vulnerable to increases in interest rates. See
"Description of Indebtedness and Securitization Program."
 
                                        9
<PAGE>   10
 
CONCENTRATION OF OWNERSHIP
 
     Upon completion of the Offering and the Option Exercises, VPI will own
beneficially approximately 47.2% of the Company's outstanding Common Stock
(including non-voting Common Stock which is convertible at the holder's option
into voting Common Stock) and members of the management of the Company will own
beneficially approximately 12.8% of the Company's outstanding Common Stock. If
these stockholders were to vote all of their shares in a similar manner, they
would effectively control the Company. In most circumstances, they would have
sufficient voting power to elect the entire Board of Directors of the Company
and, in general, to determine (without the consent of the Company's other
stockholders) the outcome of any corporate transaction or other matter submitted
to the stockholders for approval, including mergers, consolidations and the sale
of all or substantially all of the Company's assets, and to prevent or cause a
change in control of the Company.
 
COMPETITION
 
     The wholesale distribution of pharmaceuticals, health and beauty aids and
other healthcare products is highly competitive. The Company competes with
numerous national and regional distributors, some of which are larger and have
substantially greater financial resources than the Company. The Company's
national competitors include McKesson Corporation, Bergen Brunswig Corporation,
Cardinal Health, Inc. and FoxMeyer Health Corporation. In addition, the Company
competes with local distributors, direct-selling manufacturers and other
specialty distributors. Competitive factors include price, service and delivery,
credit terms, breadth of product line, customer support and marketing programs.
In part due to competitive pressures, the Company's gross profit margins have
declined from 6.00% in fiscal 1992 to 5.47% in fiscal 1994. There can be no
assurance that the Company will not encounter increased competition in the
future that could adversely affect the Company's business. The drug wholesale
industry continues to undergo significant consolidation, with the number of
wholesalers in the continental United States down from 139 at the end of 1980 to
approximately 55 as of December 31, 1994. See "Management's Discussion and
Analysis of Financial Condition and Results of Operations."
 
DEPENDENCE ON KEY PERSONNEL
 
     The Company is dependent on its senior and regional management, the loss of
certain of whom could adversely affect the Company. The Company intends to offer
employment contracts to John F. McNamara, R. David Yost and David M. Flowers,
Chairman, President and Chief Executive Officer, Group President -- Central
Region and Group President -- Eastern Region, respectively, of the Company.
However, no member of the Company's management is currently subject to an
employment contract. There can be no assurance that, over time, the Company will
be able to retain Messrs. McNamara, Yost and Flowers or all of its other senior
and regional managers.
 
EXPANSION THROUGH ACQUISITIONS
 
     The Company intends to expand into new and contiguous geographic markets,
in part, through selected acquisitions of drug wholesalers. There can be no
assurance that suitable acquisition candidates will be identified, that
acquisitions can be consummated on acceptable terms or that any acquired
companies can be integrated successfully into the Company's operations. No
substantive acquisition negotiations by the Company are currently pending, and
the Company currently has no commitments, understandings or arrangements with
respect to any specific acquisition. The Credit Agreement contains restrictions
on the Company's ability to make acquisitions. See "Description of Indebtedness
and Securitization Program -- The Credit Agreement."
 
SHARES ELIGIBLE FOR FUTURE SALE; DEMAND REGISTRATION RIGHTS
 
     No prediction can be made as to the effect, if any, that future sales of
shares, or the availability of shares for future sale, will have on the market
price of the Common Stock prevailing from time to time. Sales of substantial
amounts of Common Stock or the perception that such sales could occur, could
adversely affect prevailing market prices of the Common Stock. The existing
stockholders of AmeriSource (the "Existing Stockholders") were granted piggyback
registration rights with respect to the Company's common stock when
 
                                       10
<PAGE>   11
 
they purchased such shares. These piggyback registration rights cover
substantially all of the 14,612,193 shares of Common Stock beneficially owned by
the Existing Stockholders. In addition, VPI has demand rights to require
registration of the 10,021,073 shares of Common Stock held by it. Of the
21,212,111 shares of Common Stock outstanding after the Offering (and after the
Option Exercises), approximately 9.7 million shares will be shares of Class A
Common Stock, 10.0 million shares will be shares of Class B Common Stock and 1.5
million shares will be shares of Class C Common Stock. The Existing Stockholders
are subject to restrictions on any public sale or distribution of Common Stock
for a period of 90 days beginning on the effective date of the Registration
Statement. Sales thereafter are subject to maximum quantity limitations. In
addition, members of the management and board of directors of the Company who
own shares of Common Stock of the Company and VPI have agreed, subject to
certain exceptions, not to register for sale or offer, sell or transfer any
shares of Common Stock for a period of 180 days after the date of this
Prospectus, without the prior written consent of Donaldson, Lufkin & Jenrette
Securities Corporation ("DLJ"). These agreements cover approximately 3.0 million
shares of Class A Common Stock and 9.8 million shares of Class B Common Stock.
Following the Option Exercises, certain members of AmeriSource's management
intend to obtain margin loans secured by the shares of Common Stock acquired
pursuant to such options from DLJ and Smith Barney Inc. primarily to satisfy
withholding tax liability. In the event of a default, those shares of Common
Stock may be sold during the 180-day period following closing of the Offering.
See "Shares Eligible for Future Sale."
 
DILUTION
 
     Purchasers of Common Stock in the Offering will experience immediate and
substantial dilution in net tangible book value per share of Common Stock from
the initial public offering price. The Existing Stockholders will experience an
increase in net tangible book value per share as a result of the Offering. After
giving effect to the issuance by the Company of the 6,600,000 shares offered
hereby (based upon an initial public offering price of $21.00 per share, the
price to the public set forth on the cover of this Prospectus), the dilution in
net tangible book value to purchasers of Common Stock in the Offering would be
$30.38 per share, and the Existing Stockholders, including certain members of
the management of AmeriSource, VPI, current and former employees and directors
of AmeriSource, and others, would experience an increase in net tangible book
value of $14.69 per share as a result of the Offering. See "Dilution" and
"Principal Stockholders."
 
ABSENCE OF PUBLIC MARKET FOR THE COMMON STOCK
 
     Prior to the Offering, there has been no public market for the Common
Stock. A class of the Company's non-voting common stock trades on an infrequent
basis in the over-the-counter market. Although the Common Stock has been
approved for listing on the Nasdaq National Market, there can be no assurance
that an active or liquid trading market in the Common Stock will develop upon
completion of the Offering or, if developed, that it will be sustained. The
initial public offering price of the Common Stock was determined through
negotiations between the Company and the Underwriters and may not be indicative
of the market price for the Common Stock after the Offering. The market price
for shares of the Company's Common Stock may be highly volatile depending on
changes in general market and industry conditions. See "Underwriting."
 
                                       11
<PAGE>   12
 
                                THE REFINANCING
 
     In December 1994, the Company sold substantially all of its trade accounts
receivable and notes receivable (the "Receivables") to AmeriSource Receivables
Corporation ("ARC"), an indirect wholly-owned special purpose subsidiary of the
Company, in exchange for cash of $201.0 million and a residual certificate of
$71.3 million pursuant to a trade receivables securitization program (the
"Receivables Program"). Concurrently, the Company entered into a Receivables
Purchase Agreement with ARC, whereby the Company agreed to sell, and ARC agreed
to purchase on a continuous basis, Receivables originated by AmeriSource.
Pursuant to the Receivables Program, ARC transfers such Receivables to a master
trust in exchange for, among other things, certain trade receivables-backed
certificates (the "Certificates"). Contemporaneously, variable principal
Certificates in an aggregate principal amount of up to $230 million face amount
were sold to a group of financial institutions. The Company has accounted for
the transactions contemplated by the terms of the Receivables Purchase Agreement
as a sale of receivables from AmeriSource to ARC and as a financing transaction
by ARC on the Company's consolidated financial statements. The Certificates
represent fractional undivided interests in the Receivables and other assets of
the master trust, and do not otherwise represent recourse obligations of the
Company. During the five year term of the Receivables Program, the cash
generated by collections on the Receivables will be used to purchase, among
other things, additional Receivables originated by the Company and/or repay the
Certificates. The Certificates bear interest at a rate selected by the Company
equal to (i) the higher of (a) the applicable prime lending rate and (b) the
federal funds rate plus 50 basis points or (ii) LIBOR plus 50 basis points. The
interest rates for the Certificates are subject to the following step-ups: (i)
with respect to the ABR tranche (based on the higher of the prime rate or
federal funds rate plus 50 basis points), an additional 50 basis points
beginning one year after the closing date (December 13, 1994) and (ii) with
respect to the LIBOR tranche, an additional 12 1/2 basis points beginning six
months after the closing date, an additional 12 1/2 basis points beginning nine
months after the closing date, and an additional 75 basis points beginning one
year after the closing date. ARC is currently negotiating the terms of new
Certificates that do not contain an interest step-up feature, a majority of
which will be fixed principal, variable rate obligations and the remainder of
which will be variable principal, variable rate obligations. The Company expects
to enter into interest rate protection contracts with respect to a majority of
the fixed principal, variable rate obligations. Given existing market
conditions, the Company expects that such interest rate contracts will apply to
in excess of $150 million of the new Certificates, will be for a term of
approximately two years and will cap the related variable interest rates at
approximately 8%. Such new Certificates are expected to be issued shortly and
will, among other things, refinance the existing Certificates. None of the
Certificates have been registered under the Securities Act, and the Certificates
may not be offered or sold in the United States absent registration or an
applicable exemption from the registration requirements.
 
     At the same time that it entered into the Receivables Program, the Company
and its senior lenders amended its existing revolving credit agreement. Among
other things, the amended Credit Agreement: (i) extended the term of the
original credit agreement until January 3, 2000; (ii) established the amount the
Company may borrow at $380 million; (iii) reduced the initial borrowing rate to
LIBOR plus 225 basis points and provided interest rate stepdowns upon the
occurrence of certain events; (iv) modified the borrowing base availability from
inventory- and receivable-based to inventory-based only; and (v) increased the
Company's ability to make acquisitions and pay dividends.
 
     With the proceeds of the Receivables Program and the Credit Agreement, on
January 12, 1995, the Company redeemed all of its outstanding 14 1/2% Senior
Subordinated Notes due 1999 (the "Notes") at a redemption price of 106% of the
principal amount plus accrued interest through the redemption date and repaid
amounts under the former credit facility. With the redemption of the Notes, the
Company has refinanced all of the debt originally incurred in the leveraged
buyout to finance the Acquisition. The consummation of the Receivables Program,
the execution of the Credit Agreement and the redemption of the Notes is
referred to elsewhere in this Prospectus as the "Refinancing." See "Description
of Indebtedness and Securitization Program."
 
                                       12
<PAGE>   13
 
                                USE OF PROCEEDS
 
     The net proceeds to the Company from the sale of the shares of Common Stock
offered hereby are estimated to be approximately $128.9 million (approximately
$148.4 million if the Underwriters' over-allotment option is exercised in full)
at the initial public offering price of $21.00 per share and after deduction of
underwriting discounts and commissions and estimated offering expenses. The
Company expects to use a portion of the proceeds of the Offering (assuming the
Offering was consummated on January 15, 1995) to redeem $74.3 million principal
amount of 11 1/4% Senior Debentures due 2005 pursuant to an optional redemption
provision in the Issuer Indenture at a price equal to 110% of the principal
amount thereof plus accrued and unpaid interest through the date of redemption.
The balance of the net proceeds will be used to fund internal growth and further
expansion and for general corporate purposes, including working capital
requirements. Pending application of the net proceeds, the Company intends to
repay revolving borrowings under the Credit Agreement. Borrowings currently bear
interest at an annual rate equal to, at the Company's option, either the
applicable prime rate plus 1.00% or LIBOR plus 2.25% (10.0% and 8.5%,
respectively, at January 31, 1995) and mature on January 3, 2000. Such interest
rates are subject to reduction upon the occurrence of certain events including
improved financial performance and the sale of certain minimum equity amounts by
the Company. Following the Offering, the Company's interest rates will be
reduced to the applicable prime rate plus 0.50% or LIBOR plus 1.75% (9.5% and
8.0%, respectively, at January 31, 1995).
 
                                DIVIDEND POLICY
 
     Payment of dividends is within the discretion of the Company's Board of
Directors and will depend, among other factors, upon the Company's earnings,
financial condition and capital requirements and the terms of the Company's
financing agreements. The Company plans to retain future earnings for use in the
business and, accordingly, the Company does not anticipate paying dividends in
the foreseeable future. The Company has not paid any cash dividends to its
stockholders. The Credit Agreement restricts the ability of the Company to make
dividend payments unless certain financial tests are met.
 
                                    DILUTION
 
     At December 31, 1994, assuming the 2.95-for-1 stock split, the deficiency
in net tangible book value (total tangible assets minus total liabilities) of
the Company was $326.1 million, or ($24.07) per share of outstanding Common
Stock. After giving effect to: (i) the sale of the 6,600,000 shares of Common
Stock pursuant to the Offering at the initial public offering price of $21.00
per share (the price to the public set forth on the cover of this Prospectus)
and the application of the net proceeds therefrom (after deducting estimated
offering expenses and underwriting discounts and commissions) and (ii) the
Option Exercises, the pro forma deficiency in net tangible book value of the
Company at December 31, 1994 would have been $198.9 million or ($9.38) per
share, representing an immediate increase in net tangible book value of $14.69
per share to the Existing Stockholders and an immediate dilution of $30.38 per
share to persons purchasing shares of Common Stock in this Offering. The
following table illustrates this per share dilution:
 
<TABLE>
     <S>                                                              <C>         <C>
     Initial public offering price per share(1).....................              $ 21.00
       Net tangible book value deficiency per share at December 31,
          1994......................................................  $(24.07)
       Increase per share due to the Option Exercises...............     1.89
       Increase per share attributable to new investors.............    12.80
                                                                      -------
     Pro forma net tangible book value deficiency per share after
       the Offering and the Option Exercises........................                (9.38)
                                                                                  -------
     Dilution per share to new investors............................              $(30.38)
                                                                                  =======
</TABLE>
 
- ---------------
(1) Before deduction of expenses related to the Offering.
 
                                       13
<PAGE>   14
 
                                 CAPITALIZATION
 
     The following table sets forth the unaudited capitalization of the Company
as of December 31, 1994 on an actual basis and as adjusted to reflect (i) the
Refinancing, (ii) the Offering (based upon the offering price of $21.00 per
share, the price to the public set forth on the cover of this Prospectus) and
(iii) the Option Exercises. This table should be read in conjunction with the
consolidated financial statements of the Company and related notes, the
unaudited pro forma financial statements and related notes, "The Refinancing"
and "Use of Proceeds" included elsewhere in this Prospectus.
 
<TABLE>
<CAPTION>
                                                                        AT DECEMBER 31, 1994
                                                                    ----------------------------
                                                                     ACTUAL       AS ADJUSTED(1)
                                                                       (DOLLARS IN THOUSANDS)
<S>                                                                 <C>           <C>
Long-term debt (including current portion):
  Revolving credit facility.......................................  $ 147,041       $  286,632
  Receivables securitization financing(2).........................    202,000          202,000
  14 1/2% Senior subordinated notes...............................    166,134               --
  Other debt......................................................      1,662            1,662
  11 1/4% Senior debentures.......................................    147,970           73,985
                                                                    ---------     --------------
          Total long-term debt, including current portion.........    664,807          564,279
Stockholders' equity (deficit):
  Preferred stock, $.01 par value: 5,000,000 shares authorized
     (cancelled, as adjusted); none issued........................         --               --
  Common stock, $.01 par value:
     Class A (voting and convertible): 50,000,000 shares
      authorized, as adjusted; 10,040,069 shares issued as
      adjusted....................................................          8              100
     Class B (non-voting and convertible): 15,000,000 shares
      authorized, as adjusted; 12,980,885 shares issued as
      adjusted....................................................        130              130
     Class C (non-voting and convertible): 2,000,000 shares
      authorized; 1,475,000 shares issued as adjusted.............         15               15
Capital in excess of par value....................................      4,787          139,580
Retained earnings (deficit).......................................   (315,847)        (321,794)
Cost of common stock in treasury..................................     (1,838)          (5,823)
                                                                    ---------     --------------
     Total stockholders' equity (deficit).........................   (312,745)        (187,792)
                                                                    ---------     --------------
          Total capitalization....................................  $ 352,062       $  376,487
                                                                    =========      ===========
</TABLE>
 
- ---------------
(1) Adjusted to reflect the Refinancing, the Offering and the Option Exercises.
     Assumes the application of $128.9 million of the net proceeds from the
     Offering to: redeem one-half of the 11 1/4% senior debentures for $81.0
     million (including a $7.0 million redemption premium) representing a price
     equal to 110% of the principal amount plus accrued interest through the
     date of redemption; pay $3.5 million (net) related to the Option Exercises;
     and repay $44.4 million of borrowings under the Credit Agreement. Pro forma
     adjustments to retained earnings (deficit) include extraordinary charges
     due to the Offering of $7.0 million from the early extinguishment of debt
     and $2.3 million from the write-off of deferred financing costs, net of a
     $3.4 million tax benefit. Pro forma adjustments to common stock and capital
     in excess of par value include: $128.9 million of net proceeds from the
     Offering; reclassification of $5.5 million in accrued compensation
     associated with the 1991 Option Plan and $0.5 million of cash proceeds from
     the Option Exercises. Pro forma adjustments to the cost of common stock in
     treasury include $3.5 million related to the repurchase of shares to
     satisfy minimum tax withholding obligations related to the Option Exercises
     and $0.5 million related to common stock repurchased from VPI. Pro forma
     adjustments to stockholders' equity (deficit) do not include estimated tax
     benefits of $15.7 million related to the exercise of the non-qualified
     options under the Option Exercises noted above, which will be recorded as
     an addition to capital in excess of par value when such tax benefits are
     realized by the Company.
 
(2) Comprises the Certificates outstanding under the Receivables Program, which
    represent fractional undivided interests in the Receivables and other assets
    of the master trust, and do not otherwise represent recourse obligations of
    the Company. See "The Refinancing."
 
                                       14
<PAGE>   15
 
                              SELECTED FINANCIAL DATA
 
     The following table sets forth selected financial data and other operating
data of the Company. The statement of operations data and balance sheet data are
derived from the audited and unaudited consolidated financial statements of the
Company. The Company's historical per share data and weighted average common
shares outstanding have been restated for the 2.95-for-1 stock split declared in
connection with the Offering. The Company's primary and fully diluted earnings
per share are the same. The selected financial data should be read in
conjunction with the consolidated financial statements and related notes thereto
and Management's Discussion and Analysis of Financial Condition and Results of
Operations included elsewhere in this Prospectus. The information for interim
periods is unaudited; however, in the opinion of management, all adjustments
(consisting only of normal recurring adjustments) necessary for a fair
presentation of such information have been included. The interim results of
operations may not be indicative of the results for the full fiscal year.
 
<TABLE>
<CAPTION>
                                                                                                          THREE MONTHS ENDED
                                                      FISCAL YEAR ENDED SEPTEMBER 30,                        DECEMBER 31,
                                       --------------------------------------------------------------   -----------------------
                                          1990         1991         1992         1993         1994         1993         1994
                                                           (DOLLARS IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)
<S>                                    <C>          <C>          <C>          <C>          <C>          <C>          <C>
STATEMENT OF OPERATIONS DATA:
  Revenues...........................  $2,564,008   $2,827,161   $3,329,909   $3,719,025   $4,301,832   $1,045,776   $1,157,100
  Cost of goods sold.................   2,401,888    2,648,392    3,130,186    3,509,587    4,066,641      991,777    1,093,863
                                       ----------   ----------   ----------   ----------   ----------   ----------   ----------
  Gross profit.......................     162,120      178,769      199,723      209,438      235,191       53,999       63,237
  Selling and administrative
    expenses.........................     113,586      116,044      125,696      130,338      142,497       33,034       39,598
  Environmental remediation..........          --           --           --           --        4,075           --           --
  Stock option compensation..........          --        5,500           --           --           --           --           --
  Depreciation.......................       4,719        4,877        5,384        5,809        6,640        1,589        1,700
  Amortization of intangibles........       5,545        5,510        5,549        5,467        4,147        1,376           --
  Write-off of excess of cost over
    net assets acquired(1)...........          --           --           --           --      179,824           --           --
                                       ----------   ----------   ----------   ----------   ----------   ----------   ----------
  Operating income (loss)(2).........      38,270       46,838       63,094       67,824     (101,992)      18,000       21,939
  Interest expense...................      73,675       72,208       71,025       66,696       62,611       15,233       17,323
  Non-recurring charges(3)...........         928          951        2,244        2,223           --           --           --
                                       ----------   ----------   ----------   ----------   ----------   ----------   ----------
  Income (loss) before taxes,
    extraordinary items and
    cumulative effects of accounting
    changes..........................     (36,333)     (26,321)     (10,175)      (1,095)    (164,603)       2,767        4,616
  Taxes on income (benefit)..........      (6,844)      (3,002)       2,649        6,379        7,814          188        3,730
                                       ----------   ----------   ----------   ----------   ----------   ----------   ----------
  Income (loss) before extraordinary
    items and cumulative effects of
    accounting changes...............     (29,489)     (23,319)     (12,824)      (7,474)    (172,417)       2,579          886
  Extraordinary items(4).............          --           --        6,348      (11,144)        (656)        (656)     (11,749)
  Cumulative effects of accounting
    changes(5).......................          --           --           --           --      (34,598)     (34,598)          --
                                       ----------   ----------   ----------   ----------   ----------   ----------   ----------
  Net (loss).........................  $  (29,489)  $  (23,319)  $   (6,476)  $  (18,618)  $ (207,671)  $  (32,675)  $  (10,863)
                                        =========    =========    =========    =========    =========    =========    =========
</TABLE>
 
<TABLE>
<S>                                    <C>          <C>          <C>          <C>          <C>          <C>          <C>
EARNINGS (LOSS) PER SHARE(6):
  Income (loss) before extraordinary
    items and cumulative effects of
    accounting changes...............  $    (2.00)  $    (1.58)  $    (0.87)  $    (0.51)  $   (11.69)  $      .18   $      .06
  Extraordinary items................          --           --         0.43        (0.75)       (0.04)        (.04)        (.80)
  Cumulative effects of accounting
    changes..........................          --           --           --           --        (2.35)       (2.35)          --
                                       ----------   ----------   ----------   ----------   ----------   ----------   ----------
  Net (loss).........................  $    (2.00)  $    (1.58)  $    (0.44)  $    (1.26)  $   (14.08)  $    (2.21)  $     (.74)
                                        =========    =========    =========    =========    =========    =========    =========
  Weighted average common shares
    outstanding......................      14,750       14,750       14,750       14,750       14,750       14,750       14,750
</TABLE>
 
                                       15
<PAGE>   16
 
<TABLE>
<CAPTION>
                                                                                                          THREE MONTHS ENDED
                                                      FISCAL YEAR ENDED SEPTEMBER 30,                        DECEMBER 31,
                                       --------------------------------------------------------------   -----------------------
                                          1990         1991         1992         1993         1994         1993         1994
                                                           (DOLLARS IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)
 
<S>                                    <C>          <C>          <C>          <C>          <C>          <C>          <C>
OTHER OPERATING DATA:
  Adjusted operating income(7).......  $   43,815   $   57,848   $   68,643   $   73,291   $   86,054   $   19,376   $   21,939
  Adjusted operating income as a % of
    revenues.........................        1.71%        2.05%        2.06%        1.97%        2.00%        1.85%        1.90%
  Number of facilities at end of
    period...........................          19           19           18           16           15           17           17
  Average revenue per facility.......  $  134,948   $  148,798   $  184,995   $  232,439   $  286,789           --           --
</TABLE>
 
<TABLE>
<CAPTION>
                                                              AT SEPTEMBER 30,                              AT DECEMBER 31,
                                       --------------------------------------------------------------   -----------------------
                                          1990         1991         1992         1993         1994         1993         1994
                                                                            (IN THOUSANDS)
<S>                                    <C>          <C>          <C>          <C>          <C>          <C>          <C>
BALANCE SHEET DATA:
  Current assets.....................  $  496,701   $  530,212   $  600,845   $  627,483   $  651,710   $  702,663   $  855,867
  Working capital....................     236,962      252,468      268,424      217,160      133,355      228,716      298,499
  Total assets.......................     756,932      783,145      848,474      867,944      711,644      943,865      915,727
  Long-term debt, including current
    portion..........................     539,731      570,979      588,005      549,342      487,708      591,977      664,807
  Stockholders' equity (deficit).....     (44,946)     (68,271)     (74,747)     (93,040)    (300,726)(8)   (125,715)   (312,745)(8)
</TABLE>
 
- ---------------
 
(1) During the quarter ended June 30, 1994, the Company wrote off the remaining
    unamortized balance of its excess of cost over net assets acquired
    ("goodwill"). See "Management's Discussion and Analysis of Financial
    Condition and Results of Operations" and Note 2 to the consolidated
    financial statement included elsewhere in this Prospectus.
 
(2) Operating income is presented to assist the investor in evaluating the
    Company's results of operations before financing costs and in the case of
    adjusted operating income, before non-recurring charges.
 
(3) See "Management's Discussion and Analysis of Financial Condition and Results
    of Operation" and Note 9 to the consolidated financial statements for a
    discussion of the non-recurring charges in 1992 and 1993.
 
(4) Extraordinary items were as follows: extraordinary credits of $4.5 million
    during 1992 relating to the extinguishment of debt resulting from the
    settlement of a shareholder appraisal action arising from the Acquisition;
    extraordinary credits of $1.9 million in 1992 and $0.7 million in 1993,
    respectively, representing the utilization of net operating loss
    carryforwards; extraordinary charges of $11.9 million in fiscal 1993 and
    $0.7 million in fiscal 1994, respectively, net of tax benefits, representing
    the write-off of unamortized financing fees relating to debt refinancings
    and premiums paid on the purchase and retirement of a portion of the senior
    subordinated notes and extraordinary charges of $11.7 million, net of tax
    benefits, in the three months ended December 31, 1994, relating to the
    amendment of the revolving credit facility and the redemption premium of the
    senior subordinated notes.
 
(5) Consists of the cumulative effect of $1.2 million for the change in the
    accounting for postretirement benefits other than pensions and the
    cumulative effect of $33.4 million for the change in the accounting for
    income taxes.
 
(6) Earnings (loss) per share represents the Company's historical per share data
    and weighted average common shares outstanding restated to reflect the
    2.95-for-1 stock split declared in connection with the Offering.
 
(7) Adjusted operating income is defined as operating income plus amortization
    of intangibles for each period plus a $5.5 million stock option compensation
    charge in fiscal 1991, a $4.1 million environmental remediation charge in
    fiscal 1994 and the $179.8 million write-off of goodwill in the quarter
    ended June 30, 1994. Adjusted operating income is not an alternative to
    operating income or cash flows (as determined under generally accepted
    accounting principles) as an indicator of operating and cash flow
    performance and should be read in conjunction with the Company's
    consolidated financial statements included elsewhere in this Prospectus. The
    Company believes adjusted operating income provides investors with an
    evaluation of the Company's historical results of operations on a comparable
    basis, since the unusual items noted above were incurred in some historical
    periods, but not in others. The presentation of adjusted operating income
    should not be interpreted to suggest that the Company will not incur similar
    unusual items in the future, although none are currently anticipated.
 
                                       16
<PAGE>   17
 
(8) Includes the effect of the following charges recorded during the fiscal year
    ended September 30, 1994: (i) a $179.8 million write-off of excess of cost
    over net assets acquired during the three months ended June 30, 1994; (ii)
    extraordinary charges of $0.7 million, net of tax benefits, related to the
    early extinguishment of debt; (iii) the cumulative effect of $1.2 million
    for the change in the accounting for postretirement benefits other than
    pensions; (iv) the cumulative effect of $33.4 million for the change in the
    accounting for income taxes and, during the three months ended December 31,
    1994, (v) extraordinary charges of $11.7 million, net of tax benefits,
    related to the amendment of the revolving credit facility and the redemption
    premium of the senior subordinated notes.
 
                                       17
<PAGE>   18
 
                    MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                 FINANCIAL CONDITION AND RESULTS OF OPERATIONS
 
     The following discussion should be read in conjunction with the
consolidated financial statements contained elsewhere herein.
 
RECENT DEVELOPMENTS
 
     As a result of the Offering and the Refinancing, the Company believes that
its liquidity and capital resources will be enhanced. In December 1994, the
Company transferred approximately $272.3 million of its accounts receivable to a
master trust for approximately $201.0 million in cash and $71.3 million of
residual certificates. The cash proceeds were used to redeem all $166.1 million
of the 14 1/2% senior subordinated notes due 1999 at a redemption price of 106%,
to pay fees and expenses related thereto and to repay approximately $10.7
million of revolving credit borrowings. Upon consummation of the Offering, the
Company will redeem $74.3 million of its 11 1/4% Senior Debentures at a
redemption price of 110% of the principal amount thereof plus accrued and unpaid
interest through the date of redemption (assuming a redemption date of January
15, 1995), pay fees and expenses related thereto and further reduce outstanding
borrowings under the revolving credit facility.
 
     At the same time that it entered into the Receivables Program, the Company
and its senior lenders amended its existing credit agreement. Among other
things, the amended Credit Agreement: (i) extended the term of the Credit
Agreement until January 3, 2000; (ii) established the amount the Company may
borrow at $380 million; (iii) reduced the initial borrowing rate to LIBOR plus
225 basis points (LIBOR plus 175 basis points upon consummation of the Offering)
with further interest rate stepdowns upon the occurrence of certain events; (iv)
modified the borrowing base availability from inventory and receivables based to
inventory based only; and (v) increased the Company's ability to make
acquisitions and pay dividends. At January 31, 1995, borrowings under the Credit
Agreement were $344.8 million.
 
     The Company believes that its liquidity, capital resources and cash flows
are sufficient to fund working capital requirements, planned capital
expenditures and interest and principal payments for the foreseeable future. Pro
forma interest expense for fiscal 1994, assuming average borrowings outstanding
under the Credit Agreement and Receivables Program of approximately $192.5
million and $201.0 million, respectively, adjusted for the Offering and the
Refinancing, would have been approximately $33.1 million. There are no mandatory
scheduled repayments under the Credit Agreement and no scheduled principal
payments of other debt until January 3, 2000. The Receivables Program is
expected to liquidate beginning in October 1999.
 
                                       18
<PAGE>   19
 
RESULTS OF OPERATIONS
 
<TABLE>
<CAPTION>
                                                  FISCAL YEAR ENDED            THREE MONTHS
                                                     SEPTEMBER 30,           ENDED DECEMBER 31,
                                             ----------------------------     ----------------
                                              1992       1993       1994       1993      1994
<S>                                         <C>        <C>        <C>        <C>       <C>
Revenues................................... 100.00%    100.00%    100.00%    100.00%   100.00%
Cost of goods sold.........................  94.00      94.37      94.53      94.84     94.53
                                             ------     ------     ------     ------    ------
  Gross profit.............................   6.00       5.63       5.47       5.16      5.47
Operating expenses:
  Selling and administrative...............   3.77       3.50       3.31       3.16      3.42
  Environmental remediation................     --         --       0.09         --        --
  Depreciation.............................   0.16       0.16       0.15       0.15      0.15
  Amortization of intangibles..............   0.17       0.15       0.10       0.13        --
  Write-off of excess of cost over net
     assets acquired.......................     --         --       4.18         --        --
                                             ------     ------     ------     ------    ------
Operating income (loss)....................   1.89       1.82      (2.37)      1.72      1.90
  Interest expense-in cash.................   1.49       1.14       1.02       1.04      1.09
  Interest expense-pay in kind.............   0.52       0.55       0.35       0.34      0.34
  Amortization of deferred financing
     costs.................................   0.12       0.11       0.09       0.08      0.07
  Non-recurring charges....................   0.07       0.06         --         --        --
                                             ------     ------     ------     ------    ------
Income (loss) before taxes, extraordinary
  items and cumulative effects of
  accounting changes.......................  (0.31)     (0.03)     (3.83)      0.26      0.40
Taxes on income............................   0.08       0.17       0.18       0.01      0.32
                                             ------     ------     ------     ------    ------
Income (loss) before extraordinary items
  and cumulative effects of accounting
  changes..................................  (0.39)     (0.20)    (4.01)       0.25      0.08
Extraordinary charges-early retirement of
  debt, net of income tax benefit..........     --      (0.32)    (0.02)      (0.06)    (1.02)
Extraordinary credits:
  Settlement of litigation.................   0.13         --         --         --        --
  Reduction of income tax provision from
     carryforward of prior year operating
     losses................................   0.06       0.02         --         --        --
Cumulative effect of change in accounting
  for postretirement benefits other than
  pensions.................................     --         --      (0.03)     (0.12)       --
Cumulative effect of change in accounting
  for income taxes.........................     --         --      (0.78)     (3.19)       --
                                             ------     ------     ------     ------    ------
Net (loss).................................  (0.19)%    (0.50)%    (4.83)%    (3.12)%   (0.94)%
                                             ======     ======     ======     ======    ======
</TABLE>
 
THREE MONTHS ENDED DECEMBER 31, 1994 COMPARED WITH THREE MONTHS ENDED DECEMBER
31, 1993
 
     Revenues in the first quarter of fiscal 1995 increased 10.6% to $1.2
billion from $1.0 billion in fiscal 1994. The increase reflects real volume
growth, the pass through to customers of price increases from manufacturers and
the opening of two new distribution facilities in November 1994. The most
significant revenue increase was in the hospital customer group, where revenues
were approximately 16% ahead of the comparable period of the prior year.
 
     Gross profit in the three months ended December 31, 1994 increased to $63.2
million, an increase of 17.1% from the same quarter of fiscal 1994, due to
increased revenues, increased purchase discounts and a greater level of price
increases from manufacturers resulting in greater opportunities for forward
purchasing. As a percentage of revenues, the gross profit margin for the quarter
was 5.47% as compared to 5.16% in the prior year, due primarily to increased
purchase discounts and a greater level of price increases from manufacturers
resulting in greater opportunities for forward purchasing. The Company is not
able to predict whether such opportunities and the resulting favorable impact on
the results of operations will continue in the future.
 
                                       19
<PAGE>   20
 
     Selling and administrative expenses for the first quarter of fiscal 1995
were $39.6 million compared to $33.0 million for the first quarter of fiscal
1994, an increase of 19.9%. The cost increases reflect inflationary increases
and increases in warehouse and delivery expenses which are variable with the
level of sales volume as well as start-up expenses incurred to open the two new
distribution facilities. As a percentage of revenues, selling and administrative
expenses were 3.42% in the first quarter compared to 3.16% in the same quarter
last year.
 
     The decrease in amortization of intangibles in the first quarter of fiscal
1995 was as a result of the write-off of the value of the excess of cost over
net assets acquired ("goodwill"), which the Company recorded in the quarter
ended June 30, 1994.
 
     Interest expense payable currently for the three months ended December 31,
1994 of $12.6 million increased $1.8 million compared with interest expense
payable currently for the three months ended December 31, 1993. The increase is
due primarily to higher interest rates on the Company's variable rate
borrowings, partially offset by lower average borrowings. In connection with the
Receivables Program, the Company expects to enter into interest rate protection
contracts with respect to a majority of the variable rate receivable-based
certificates. The weighted average interest rate on the Company's variable rate
borrowings during the three months ended December 31, 1994 was 9.0% as compared
to 6.7% during the three months ended December 31, 1993. Interest expense which
is not payable currently (pay-in-kind interest) was $4.0 million for the three
months ended December 31, 1994 as compared to $3.6 million for the three months
ended December 31, 1993.
 
     The income tax provision for the three months ended December 31, 1994 was
computed on a regular tax basis and based on an estimate of the full year
effective tax rate. The extraordinary charge of $15.4 million, net of a tax
benefit of $3.7 million, relates to the amendment of the Credit Agreement and
the redemption premium of the 14 1/2% senior subordinated notes and the
consequent write-off of unamortized financing fees.
 
YEAR ENDED SEPTEMBER 30, 1994 COMPARED WITH YEAR ENDED SEPTEMBER 30, 1993
 
     Revenues for the fiscal year ended September 30, 1994 were $4.3 billion, an
increase of 15.7% over the $3.7 billion in revenues for 1993. The revenue
growth, which occurred for all customer groups, reflects real volume growth as
well as the pass through to customers of price increases from manufacturers.
Price increases accounted for approximately one-tenth of the revenue increase in
1994. As compared with the prior fiscal year, sales to hospitals and managed
care facilities grew by 27%, sales to chain drug stores, excluding brokerage
business, increased by 8% and sales to independent community pharmacies
increased by 4%. During 1994, sales to hospitals and managed care facilities
accounted for 46% of total revenues, while sales to independent community
pharmacies represented 34% and sales to chain drug stores, 20% of the total.
 
     Gross profit of $235.2 million for 1994 increased by 12.3% over 1993,
primarily due to the increase in revenues. As a percentage of revenues, gross
profit declined to 5.47% in 1994 from 5.63% in 1993. The reduction in the gross
profit percentage resulted from continued industry price competition and
increased sales to larger volume, lower margin customers, such as hospitals.
 
     Selling and administrative expenses for 1994 were $142.5 million compared
to $130.3 million for 1993, an increase of 9.3%. The cost increases reflect
inflationary increases and increases in warehouse and delivery expenses which
are variable with the level of sales volume. Continued emphasis on cost
containment programs as well as the economies associated with the significant
revenue growth, reduced overall selling and administrative expenses as a
percentage of revenues to 3.31% in 1994 from 3.50% in 1993.
 
     Operating expenses in 1994 include a provision of $4.1 million to cover the
expected environmental remediation costs with respect to the Company's former
Charleston, South Carolina distribution center. In addition, in the third
quarter of fiscal 1994, the Company completed a detailed evaluation of the
recovery of the recorded value of the excess of cost over net assets acquired
("goodwill") and concluded that projected operating results together with its
then existing capital structure would not support the future recovery of the
remaining goodwill balance. Accordingly, the Company wrote off the remaining
goodwill balance of $179.8
 
                                       20
<PAGE>   21
 
million in the quarter ended June 30, 1994. Goodwill of approximately $209
million was recorded at the time of the Acquisition in 1988.
 
     Interest expense which is payable currently (cash interest), principally
related to the revolving credit facility and the senior subordinated notes, was
$43.7 million in 1994 as compared with $42.4 million in 1993, an increase of
3.3%. The increase was a result of higher interest rates on the Company's
variable rate borrowings offset in part by lower variable rate borrowing levels
and the reduction in principal amount of the senior subordinated notes. Interest
expense in 1994 reflects reductions as a result of the purchase and retirement
of an aggregate principal amount of $8.9 million of senior subordinated notes,
which occurred during the fourth quarter of fiscal 1993 and first quarter of
fiscal 1994. Interest expense in 1994 includes $621,000 paid to the holders of
an aggregate of $165.7 million in principal amount of senior subordinated notes
(see Note 4 of "Notes to Consolidated Financial Statements"). During 1994, the
average outstanding debt level was $430 million at an average interest rate of
10.0%. In 1993, the comparable average outstanding debt level was $441 million
at an average interest rate of 9.6%. The decrease in interest expense which is
not currently payable (pay-in-kind interest) of $5.5 million was due to the
refinancing in July, 1993 of the 18% senior subordinated debentures, 18 1/2%
merger debentures and 19 1/2% junior subordinated debentures with the 11 1/4%
senior debentures. Interest expense in 1994 includes $4.0 million in
amortization of financing fees as compared with $3.9 million in 1993.
 
     Income tax expense in 1994 and 1993 has been determined based on the
alternative minimum tax system. As noted below, the Company changed its method
of accounting for income taxes effective October 1, 1993. The extraordinary
charge of $679,000, net of a tax benefit of $23,000, relates to the purchase and
retirement of an aggregate principal amount of $4.4 million of senior
subordinated notes.
 
     Effective October 1, 1993, the Company adopted Statement of Financial
Accounting Standards No. 106 "Employers' Accounting for Postretirement Benefits
Other Than Pensions" (Statement 106) and Statement of Financial Accounting
Standards No. 109 "Accounting for Income Taxes" (Statement 109). The Company
recorded, as of October 1, 1993, a total of $34.6 million in non-cash charges to
net income for the effects of transition to these two new standards. Statement
106 requires that the expected cost of providing postretirement medical benefits
be accrued during employees' working years rather than on a pay-as-you-go basis
as was previously permitted. The cumulative effect of this change in accounting
principle resulted in a non-cash charge to net income of $1.2 million as of
October 1, 1993. Statement 109 requires a change in the method of accounting for
income taxes from the deferred method to the liability method. Under the
liability method, deferred taxes result from differences between the tax and
financial reporting bases of assets and liabilities and are adjusted for changes
in tax rates and tax laws when changes are enacted. The cumulative effect of
this change in accounting principle resulted in a non-cash charge to net income
of $33.4 million as of October 1, 1993, principally related to the provision of
deferred income taxes to reflect the tax consequences on future years of the
difference between the tax and financial reporting basis of merchandise
inventories.
 
YEAR ENDED SEPTEMBER 30, 1993 COMPARED WITH YEAR ENDED SEPTEMBER 30, 1992
 
     Revenues for the fiscal year ended September 30, 1993 were $3.7 billion, an
increase of 11.7% over the $3.3 billion in revenues for 1992. The revenue
growth, which occurred for all customer groups, was attributable to the addition
of new accounts, increased sales to existing accounts through value added
services and price increases. Price increases accounted for approximately
one-fourth of the revenue increase in 1993. As compared with the prior fiscal
year, sales to hospitals and managed care facilities increased by 24%, sales to
independent community pharmacies increased by 3% and sales to chain stores grew
by 7%. Sales to hospitals and managed care facilities accounted for 42% of total
revenues in 1993, while sales to independent community pharmacies represented
37% and sales to chain drug stores, 21% of the total.
 
     As a percentage of revenues, gross profit declined to 5.63% in 1993 from
6.00% in 1992. The decline in 1993 resulted from: increased sales to large
volume, lower margin and lower-cost-to-service customers, principally hospitals;
price competition within the industry; and a reduction in inventory purchasing
gains associated with the decline in the rate and frequency of manufacturer
price increases.
 
                                       21
<PAGE>   22
 
     Selling and administrative expenses for the year ended September 30, 1993
were $130.3 million, or 3.50% of revenues, compared to $125.7 million, or 3.77%
of revenues for the prior year. Selling and administrative expenses, which
increased by $4.6 million, or 3.7% from the prior year, reflect the economies
associated with the revenue growth and reductions due to cost containment
measures and productivity improvements. The expense percentage improvement in
1993 also reflects the partial benefits of two distribution facility
consolidations completed during the latter part of 1993. Expenses in 1993
include $1 million in costs incurred with respect to the two completed facility
consolidations as well as an additional consolidation which began in late 1993
and is expected to be completed during the first quarter of fiscal 1994.
 
     As a result of the above, operating income increased 7.5%, or $4.7 million,
to $67.8 million for the fiscal year ended September 30, 1993 in comparison to
the prior year, while operating income as a percentage of revenues was 1.82% in
1993 versus 1.89% in 1992.
 
     Interest expense which is payable currently (cash interest), principally
related to the revolving credit facility and the senior subordinated notes, was
$42.4 million in 1993 as compared with $49.8 million in 1992, a decrease of
14.9%. The decrease is attributable to reduced borrowings and lower average
interest rates. During 1993, the average outstanding debt level was $441 million
at an average interest rate of 9.6%. In 1992, the comparable average outstanding
debt level was $480 million at an average interest rate of 10.3%. Interest
expense in 1993 includes $3.9 million in amortization of financing fees as
compared with $4.0 million in 1992. Interest on the senior debentures, senior
subordinated debentures, merger debentures and junior subordinated debentures
which, at the option of the Company, is not currently payable (pay in kind
interest), amounted to $20.4 million in 1993 as compared with $17.3 million in
1992.
 
     The non-recurring charges in 1993 consist of $1.3 million in losses on the
disposal of three warehouses and charges of $969,000 for the write-down to net
realizable value of two additional warehouses no longer in operation which are
designated for sale. The non-recurring charges in 1992 consist of a loss of
$287,000 incurred on the sale of a warehouse no longer in operation and the
write-off of $2.0 million in professional fees incurred in connection with a
public offering attempted during 1992 which was later abandoned due to market
conditions.
 
     Income tax expense in both 1993 and 1992 was computed based on the
alternative minimum tax system. The extraordinary charge of $16.7 million, net
of a tax benefit of $4.8 million, relates to the write-off of unamortized
financing fees relating to the refinancings of the revolving credit facility and
the Company's debt and premiums paid on the purchase and retirement of a portion
of the senior subordinated notes. The extraordinary credits for income taxes in
1993 and 1992 represent the utilization of net operating losses carried forward
from earlier periods.
 
INFLATION
 
     The Company uses the LIFO method of accounting in order to minimize the
effect of inflation on inventory value. Under this method, the effect of
suppliers' price increases is charged directly to cost of goods sold.
Concurrently, the Company increases selling prices, where possible, in order to
maintain its gross profit margin. The effect of price inflation, as measured by
the excess of LIFO costs over FIFO costs, was $5.3 million in 1994, $13.5
million in 1993 and $13.2 million in 1992.
 
LIQUIDITY AND CAPITAL RESOURCES
 
     Historically, the Company's operating results have generated sufficient
cash flows which, together with borrowings under the revolving credit facility
and credit terms from suppliers, have provided sufficient capital resources to
finance working capital and cash operating requirements, fund capital
expenditures and interest currently payable on outstanding debt. Future cash
flows are expected to be sufficient to fund capital expenditures and interest
currently payable over the near-term. The primary sources of the Company's
working capital and cash operating requirements are cash flows from operations
and borrowings under the Receivables Program and the Credit Agreement.
 
                                       22
<PAGE>   23
 
     During the three-month period ended December 31, 1994, the Company's
operating activities consumed $160.0 million in cash. The increase of $33.2
million in accounts receivable and the increase of $162.8 million in merchandise
inventories offset by the $23.8 million increase in accounts payable accounted
for most of the use of funds. The increases in merchandise inventories and
accounts payable reflect the timing of seasonal purchases and related payments
as well as purchases in anticipation of manufacturer price increases. A portion
of the increase in merchandise inventories during the quarter was the result of
the opening of the Springfield, Massachusetts and Portland, Oregon distribution
facilities. Operating cash uses during the three-month period ended December 31,
1994 included $5.0 million in interest payments and $1.4 million in income tax
payments.
 
     During the fiscal year ended September 30, 1994, operating activities
provided cash of $84.0 million, compared to a generation of $99.2 million in
cash during the fiscal year ended September 30, 1993. Accounts receivable and
merchandise inventories increased during fiscal 1994 by $24.9 million and $5.3
million, respectively, offset by an increase of $70.2 million in accounts
payable. The increases in accounts receivable and merchandise inventories are
commensurate with the Company's revenue growth. Accounts payable, accrued
expenses and income taxes increased by $76.8 million in 1994 as compared to an
increase of $77.1 million in 1993. These year to year increases reflect
increased credit from suppliers due to the Company's improved operating
performance as well as increases to support the expanded revenue base and
increases in tax liabilities as a result of the Company's return to taxpayor
status. A portion of the increase in merchandise inventories was the result of
the opening of the Dallas, Texas distribution facility, which occurred in the
first quarter of fiscal 1994. Operating cash uses during fiscal 1994 included
$46.1 million in interest payments and $3.9 million in income tax payments.
 
     Capital expenditures required for the Company's business historically have
not been substantial. Capital expenditures for the three months ended December
31, 1994 were $3.4 million and relate principally to the opening of the two new
distribution centers and additional investment in management information
systems. Capital expenditures for the fiscal year ended September 30, 1994 were
$8.5 million and related principally to improvements in warehouse distribution
and management information systems. Capital expenditures for fiscal 1995 are
projected to approximate $9.5 million. As a result of the Receivables Program
financing in December 1994, borrowings under the Company's revolving credit
facility were reduced to $147.0 million at December 31, 1994 (at an average
interest rate of 9.0%) from the $175.9 million (at an average interest rate of
8.1%) outstanding at September 30, 1994. Borrowings under the Receivables
Program were $202.0 million at December 31, 1994 at an interest rate of 7.05%.
Cash used in financing activities during fiscal 1994 included $5.0 million in
payments associated with the redemption of an aggregate principal amount of $4.4
million of senior subordinated notes. As a result of the cash generated during
fiscal 1994, borrowings under the Company's revolving credit facility were
reduced to $175.9 million at September 30, 1994 from the $248.0 million
outstanding at September 30, 1993.
 
     In December, 1994, the Company called the senior subordinated notes for
redemption. The senior subordinated notes were redeemed on January 12, 1995. At
January 31, 1995 borrowings under the Credit Agreement were $344.8 million.
 
     The Company has become aware that its former Charleston, South Carolina
distribution center was previously owned by a fertilizer manufacturer and that
there is evidence of residual contamination remaining from the fertilizer
manufacturing process operated on that site over thirty years ago. The Company
engaged an environmental consulting firm to conduct a soil survey and initiated
a groundwater study during fiscal 1994. The preliminary results of the
groundwater study indicate that there is lead in the groundwater at levels
requiring further investigation and response. A preliminary engineering analysis
was prepared by outside consultants during the third quarter of fiscal 1994, and
indicated that, if both soil and groundwater remediation are required, the most
likely cost of remediation efforts at the Charleston site is estimated to be
$4.1 million. Accordingly, a liability of $4.1 million was recorded during the
third quarter of fiscal 1994 to cover future consulting, legal and remediation
and ongoing monitoring costs. The Company has notified the appropriate state
regulatory agency from whom approval must be received before proceeding with any
further tests or with the actual site remediation. The approval process and
remediation could take several years to accomplish and the actual costs may
differ from the liability which has been recorded. The accrued liability, which
is reflected in other long-term liabilities on the accompanying consolidated
balance sheet, is based on an estimate of the
 
                                       23
<PAGE>   24
 
extent of contamination and choice of remedy, existing technology and presently
enacted laws and regulations, however, changes in remediation standards,
improvements in cleanup technology and discovery of additional information
concerning the site could affect the estimated liability in the future. The
Company is investigating the possibility of asserting claims against responsible
parties for recovery of these costs. Whether or not any recovery may be
forthcoming is unknown at this time, although the Company intends to vigorously
enforce its rights and remedies.
 
     The Company's primary ongoing cash requirements will be to fund payment of
principal and interest on indebtedness, finance working capital and fund capital
expenditures. An increase in interest rates would adversely affect the Company's
operating results and the cash flow available after debt service to fund
operations and any expansion and, if permitted to do so under its revolving
credit facility and the indenture for the senior debentures, the ability to pay
dividends on its capital stock.
 
     The Company wrote-off its goodwill balance of $179.8 million in the quarter
ended June 30, 1994. The goodwill was recorded at the time of the leveraged
buyout transaction ("Acquisition") in 1988. Since the Acquisition, the Company
has been unable to achieve the operating results projected at the time of the
Acquisition. The projections at the time of the Acquisition were developed based
on historical experience, industry trends and management's estimates of future
performance. These projections assumed significant growth rates in revenues,
stable gross profit margins and cash flow from operations to reduce Acquisition
indebtedness and did not anticipate long-term losses or indicate an inability to
recover the value of goodwill. Due to persistent competitive pressures and a
shift in the customer mix to larger volume, lower margin customers, gross profit
margins have declined from 7.10% in fiscal 1989 to 5.63% in fiscal 1993 and
5.47% in fiscal 1994, resulting in: operating results which are substantially
below the projections made at the time of the Acquisition; an increase in the
Company's indebtedness; and an accumulated deficit in retained earnings at June
30, 1994 before the goodwill write-off of $126.4 million.
 
     During the period since the Acquisition, the Company has been affected by
price competition for market share within the industry, health care industry
consolidation and the impact of group purchasing organizations, managed care and
health care reform on drug prices. As a result of the negative impact of these
factors and the Company's expectation that such factors would continue to
negatively impact operating results into the foreseeable future, the Company
initiated a detailed evaluation of the long-term expected effects of these
factors on the ability to recover the recorded value of goodwill over its
remaining estimated life. Based on industry trends, interest rate trends and the
health care reform environment, in the quarter ended June 30, 1994, the Company
revised its operating projections and concluded that the projected operating
results (the "Projection") would not support the future recovery of the
remaining goodwill balance.
 
     The methodology employed to assess the recoverability of the Company's
goodwill was to project results of operations forward 36 years, which
approximated the remaining amortization period of the goodwill balance at June
30, 1994. The Company then evaluated the recoverability of goodwill on the basis
of the Projection. The Company's Projection assumed that, based on industry
conditions and competitive pressures, future revenue growth would approximate
12.6% in the near-term gradually declining to approximately 5% over the
longer-term. These assumptions reflected expected benefits in the near-term from
continued industry consolidation, and an expectation that manufacturers would
continue to increase their reliance on wholesalers in their own cost control
measures in the face of healthcare reform. Over the next five to ten year
period, growth in revenue was expected to moderate as the industry consolidation
trend was completed, and over the long-term (next twenty years), stable growth
of 5% was assumed. The gross profit percentage was projected to gradually
decline over the projected period from the then current rate to 3.60% in the
fiscal year 2000 and to 2.68% in the longer term. The short-term gross profit
declines reflected the impact of the worsened trends in 1994 caused by
consolidation of certain major competitors and deteriorated gross profit margins
from existing contracts with certain group purchasing organizations. The
long-term decline in gross profit reflected the Company's belief that continued
industry wide competitive pricing pressures would drive margins down, as the
consolidated industry attempts to maintain market share. Operating expenses were
projected to increase 6% per year in the near-term and 5% per year in the
longer-term principally reflecting the Company's expectations regarding
inflation. Working capital levels (as a percentage of revenues) were projected
to improve as the Company aggressively managed its investment in receivables and
inventory over the projected period. For
 
                                       24
<PAGE>   25
 
purposes of the Projection, the Company had assumed that it would be able to
refinance its current revolving credit facility when it expired in 1996. For
purposes of the Projection, the Company assumed that it would be able to
increase its variable rate borrowings to finance increasing working capital and
interest payment requirements. In order to meet the working capital and interest
payment requirements projected in fiscal year 2000, the revolving credit
facility would have to be increased to $460 million. Interest rates on the
variable rate revolving credit facility were assumed to increase to 9.75% to
reflect then current expectations of future short-term borrowing rates. The
Projection also indicated that cash flow from operations would not be sufficient
to satisfy maturities of the Company's fixed rate debt obligations, which
consisted of the 14 1/2% senior subordinated notes due in fiscal 1998 and fiscal
1999 and the 11 1/4% senior debentures due in fiscal 2005. The Projection
assumed that these fixed rate debt obligations would be refinanced at the time
of the scheduled maturities at identical interest rates. The Company determined
that unless it was able to develop successful strategic, operating or financing
initiatives which would change these assumptions, the projected future operating
results based on these assumptions represented the best estimate of the
Company's projected performance given the Company's existing high leverage and
industry trends.
 
     The Projection reflected significant cumulative losses indicating that the
carrying value of goodwill was not recoverable. Accordingly, the Company wrote
off its remaining goodwill balance of $179.8 million in the quarter ended June
30, 1994. More importantly, while the Company believed the reliability of any
projection over such an extended period is highly uncertain, the Projection also
indicated that the Company's long-term viability would require modification of
its then current capital structure to reduce its indebtedness and increase its
equity in the near to mid-term future. While the Projection indicated that in
fiscal 1998 cash flow from operations would not be sufficient to satisfy
required interest and principal payments on its current debt obligations, the
Company believed and the Projection indicated, that cash flow generated from
operations in the near-term (fiscal years 1995 through 1997) would be sufficient
to service its then current debt obligations. The Company was unable to provide
any assurance that the Company would be successful in efforts to restructure or
recapitalize in order to be able to operate in a profitable manner for the
long-term.
 
     In December 1994, the Company sold substantially all of its Receivables to
ARC, pursuant to the Receivables Program. Pursuant to the Receivables Program,
ARC will continuously transfer Receivables to a master trust in exchange for,
among other things, Certificates representing a right to receive a variable
principal amount. Contemporaneous with the consummation of the Receivables
Program, the Company amended its existing Credit Agreement with its senior
lenders and redeemed all of the outstanding Notes at a redemption price of 106%
of the principal amount plus accrued interest through the redemption date. See
"The Refinancing" and "Description of Indebtedness and Securitization Program."
 
                                       25
<PAGE>   26
 
                                    BUSINESS
 
     AmeriSource is the fifth largest full-service wholesale distributor of
pharmaceutical products and related health care services in the United States.
The Company services its customers nationwide through 16 drug distribution
facilities and one specialty products distribution facility. AmeriSource is
typically the primary source of supply to its customers and offers a broad range
of services designed to enhance the operating efficiencies and competitive
position of its customers and suppliers. The Company benefits from a diverse
customer base that includes hospitals and managed care facilities (46%),
independent community pharmacies including retail drug stores, nursing homes and
clinics (34%) and chain drug stores including pharmacy departments of
supermarkets and mass merchandisers (20%).
 
     Over the past five years, AmeriSource has achieved significant growth in
revenues and adjusted operating income. The Company's revenues have increased
from $2.6 billion in fiscal 1990 to $4.3 billion in fiscal 1994, a compound
annual growth rate of 13.8%, while adjusted operating income increased from
$43.8 million in fiscal 1990 to $86.1 million in fiscal 1994, a compound annual
growth rate of 18.4%. The Company's growth is primarily the result of market
share gains in existing markets, geographic expansion and overall industry
growth.
 
BUSINESS STRATEGY
 
     Over the past five years, AmeriSource has significantly expanded its
national presence as a leading, innovative wholesale distributor of
pharmaceutical products and related health care services. The Company believes
it is well-positioned to continue its revenue growth and increase operating
income through the execution of the following key elements of its business
strategy:
 
- - Expanding into New Geographic Markets.  The Company believes that there are
  substantial opportunities to grow by expanding into new geographic areas
  through opening new distribution facilities and making selective,
  complementary acquisitions. During the past 17 months, the Company has opened
  three new distribution facilities. In October 1993, the Company opened a
  facility in Dallas, Texas, and in November 1994, the Company opened two
  additional facilities in Portland, Oregon and Springfield, Massachusetts. Each
  of these new facilities began operations with an existing customer base in its
  regional marketplace, providing for profitable operations (on an operating
  income basis) almost immediately upon opening. The Company plans to open new
  distribution facilities in Sacramento, California and Orlando, Florida during
  calendar 1995. In addition, the Company believes that as industry
  consolidation pressures continue, opportunities will arise to selectively
  acquire local and regional drug wholesale companies facilitating expansion
  into new geographic areas and enhancement of its competitive position in
  existing markets. Prior to the Acquisition in 1988, AmeriSource's management
  team completed 18 acquisitions over a 10-year period. The completion of the
  Offering and the Refinancing will significantly increase the Company's
  financial flexibility, including its ability to pursue acquisitions.
 
- - Increasing Market Share in Existing Markets.  The Company believes that it is
  well positioned to continue to grow in its existing markets by: (i) providing
  superior distribution services and specialty value-added programs which reduce
  its customers' cost of operations; (ii) maintaining its low cost operating
  structure to ensure that the Company's services are priced competitively in
  the marketplace; (iii) continuing to focus on the higher growth hospital and
  managed care market segment through the use of dedicated facilities and
  advanced information systems; and (iv) maintaining its decentralized operating
  structure to respond to customers' needs more quickly and efficiently and to
  ensure the continued development of local and regional management talent.
  These factors have allowed AmeriSource to compete effectively in the
  marketplace, generate above-average industry sales growth over the last three
  years and develop new types of customers, such as the federal government. For
  example, over the past two years the Company has been awarded contracts to
  provide approximately 75% of the pharmaceuticals purchased by federal
  government hospital facilities nationwide. In addition, the Company continues
  to grow with its existing customers. In January 1995, the Company was selected
  by VHA Inc., one of the nation's largest healthcare providers, as one of its
  three preferred providers.
 
                                       26
<PAGE>   27
 
- - Continuing Growth of Specialty Services.  The Company works closely with both
  customers and suppliers to develop an extensive range of specialty services.
  In addition to enhancing the Company's profitability, these services increase
  customer loyalty and strengthen the Company's overall role in the healthcare
  distribution channel. These services include:
 
          -- ECHO(TM), the Company's proprietary software system, provides
             sophisticated ordering and inventory management assistance to its
             hospital and retail customers. In addition to facilitating the
             primary supply arrangement between the Company and its customers,
             ECHO(TM) enables the Company's customers to reduce their costs
             through ordering more efficiently, selecting from best price
             alternatives and maintaining formulary compliance. Since the
             introduction of ECHO(TM) in early fiscal 1991, the Company has
             installed approximately 2,000 systems nationwide, 600 of which were
             installed in fiscal 1994, and believes that its installed base of
             systems is one of the largest in the wholesale drug industry.
 
          -- Family Pharmacy(R) enables small chain and independent community
             pharmacies to compete more effectively through: (i) innovative
             advertising, marketing and promotional campaigns; (ii) value-added
             merchandising programs including private label product lines; and
             (iii) enhanced access to pharmaceutical benefit programs of large
             health care groups, including third party payor programs. Family
             Pharmacy(R) has grown dramatically in recent years, adding over 550
             new member-stores in fiscal 1994. As of December 31, 1994, the
             1,861 Family Pharmacy(R) member-stores in effect constitute one of
             the largest drugstore chains in the United States.
 
          -- The Company's Income Rx(R) program provides an integral value-added
             service to its hospital and retail pharmacist customers by
             continually reviewing the marketplace for generic products that
             offer the best price, quality and availability. With the increasing
             importance of generic pharmaceuticals this program represents a
             significant opportunity for growth and profitability. Revenues
             attributable to AmeriSource's sale of generic and multi-source
             pharmaceuticals (including through the Income Rx(R) program) have
             increased to approximately $450 million in fiscal 1994, more than
             twice what they were in fiscal 1992.
 
          -- AmeriSource operates a pharmaceutical repackaging business that
             markets products through its Income RePax(R) program. Repackaging
             pharmaceuticals from bulk quantities into smaller units provides
             the Company's customers with lower product, inventory and
             dispensing (labor) costs.
 
          -- The Company's Health Services Plus subsidiary distributes oncology
             and other specialty products to clinics and physician groups on a
             national basis. Rita Ann Distributors markets cosmetics and
             fragrances to chain drugstores and independent retail customers.
 
- - Maintain Low Cost Operating Structure.  AmeriSource has the lowest operating
  cost structure among its four major national competitors. Over the past six
  years, the Company has significantly reduced operating expenses and investment
  in net working capital as a percentage of revenues. Specifically, the Company
  has reduced its selling and administrative expenses as a percentage of
  revenues from 5.36% in fiscal 1988 to 3.31% in fiscal 1994. In addition, the
  Company continues to achieve productivity and operating income gains from
  continued investments in advanced management information systems, warehouse
  automation technology, and from operating leverage due to above industry
  average volume per facility. In fiscal 1994, the Company's average revenue per
  facility was $287 million compared to a calendar 1993 industry average of $175
  million. The addition of two new facilities in November 1994 was accomplished
  with minimal incremental investment in corporate overhead. As these facilities
  continue to expand in their regional markets, the Company believes that its
  growth and profitability will be further enhanced.
 
INDUSTRY OVERVIEW
 
     The Company has benefited from the significant growth of the full-service
drug wholesale industry in the United States. Industry sales grew from $30
billion in 1990 to an estimated $53 billion in 1994. The factors contributing to
this growth, and the sources of future growth for the industry, include (i) an
aging population,
 
                                       27
<PAGE>   28
 
(ii) the introduction of new pharmaceuticals, (iii) the increased use of
outpatient drug therapies, (iv) a higher concentration of distribution through
wholesalers by both manufacturers and customers, and (v) rising pharmaceutical
prices.
 
     Aging Population.  The number of individuals over age 65 in the United
States has grown 23% from approximately 26 million in 1980 to approximately 32
million in 1990 and is projected to increase an additional 9% to more than 35
million by the year 2000. This age group suffers from a greater incidence of
chronic illnesses and disabilities than the rest of the population and is
estimated to account for approximately two-thirds of total health care
expenditures in the United States.
 
     Introduction of New Pharmaceuticals.  Traditional research and development
as well as the advent of new research and production methods, such as
biotechnology, continue to generate new compounds that are more effective in
treating diseases. These compounds have been responsible for significant
increases in pharmaceutical sales. The Company believes that ongoing research
and development expenditures by the leading pharmaceutical manufacturers will
contribute to continued growth of the industry.
 
     Cost Containment Efforts.  In response to rising health care costs,
governmental and private payors have adopted cost containment measures that
encourage the use of efficient drug therapies to prevent or treat diseases.
While national attention has been focused on the overall increase in aggregate
health care costs, the Company believes drug therapy has had a beneficial impact
on overall health care costs by reducing expensive surgeries and prolonged
hospital stays. Pharmaceuticals currently account for less than 9% of overall
healthcare costs, and manufacturers' emphasis on research and development is
expected to continue the introduction of cost effective drug therapies.
 
     Higher Concentration of Distribution Through Wholesalers.  Over the past
decade, manufacturers of pharmaceuticals have significantly increased the
distribution of their products through wholesalers as the cost and complexity of
maintaining inventories and arranging for delivery of pharmaceutical products
has risen. Drug wholesalers offer their customers and suppliers more efficient
distribution and inventory management. As a result, from 1980 to 1994, the
percentage of total pharmaceutical sales through wholesale drug distributors
increased from approximately 57% to approximately 78%. Order processing,
inventory management and product delivery by wholesale drug distributors allow
manufacturers to allocate their resources to research and development,
manufacturing and marketing their products. Customers benefit from this shift by
having a single source of supply for a full line of pharmaceutical products as
well as lower inventory costs, more timely and efficient delivery, and improved
purchasing and inventory information. In addition, customers also benefit from
the range of value-added programs developed by wholesale drug distributors that
are targeted to the specific needs of these customers, which, in turn, reduce
their costs and increase their operating efficiencies.
 
     Pharmaceutical Price Increases By Drug Manufacturers.  The Company believes
that price increases by pharmaceutical manufacturers will equal or exceed the
overall Consumer Price Index. The Company believes that this increase will be
due in large part to the relatively inelastic demand in the face of higher
prices charged for patented drugs as manufacturers have attempted to recoup
costs associated with the development, clinical testing and Food and Drug
Administration ("FDA") approval of new products.
 
     At the same time that sales through the wholesale drug industry have grown,
the number of pharmaceutical wholesalers in the United States has decreased from
139 at the end of 1980 to approximately 55 as of December 31, 1994. Industry
analysts expect this consolidation trend to continue during the 1990s, with the
industry's largest companies increasing their percentage of total industry
sales.
 
OPERATIONS
 
     Decentralized Structure.  The Company believes that operating economies of
scale exist principally at the distribution facility level. Beginning in fiscal
1989, the Company undertook an extensive consolidation program, which closed 17
of the 31 facilities open on October 1, 1988. During the course of this
consolidation program, the Company continued to significantly increase its
revenues in each fiscal year. During fiscal 1994, the Company's average revenue
per facility was approximately $287 million, compared to the calendar 1993
 
                                       28
<PAGE>   29
 
industry average of $175 million. Five AmeriSource facilities each have annual
volume of over $400 million and an additional seven facilities each have annual
volume in excess of $175 million, which provides the Company with continued
opportunities for significant leverage of fixed overhead and other costs.
 
     To expand into new geographic markets, AmeriSource opened three new
facilities during the past 17 months, and currently operates 16 drug wholesale
distribution facilities and one specialty products distribution facility,
organized into six regions across the United States. The Company also plans to
open additional distribution facilities in Sacramento, California and Orlando,
Florida during calendar 1995. Several operating units of the Company have over
100 years of history in the business and are among the nation's first drug
distribution businesses. Unlike its more centralized competitors, the Company is
structured as an organization of locally managed profit centers. Management of
each operating unit has fiscal responsibility for its unit, and each operating
unit has an established executive, sales and operations staff. The operating
unit's results, including earnings and asset management goals, have a direct
impact on management compensation. The operating units utilize the Company's
corporate staff for marketing, financial, legal and executive management
resources and corporate coordination of asset and working capital management.
 
     Customers and Markets.  The Company benefits from a diverse customer base
that includes hospitals and managed care facilities (46%), independent community
pharmacies including retail drug stores, nursing homes and clinics (34%) and
chain drug stores including pharmacy departments of supermarkets and mass
merchandisers (20%). The Company offers a broad range of services designed to
enhance the operating efficiencies and competitive position of its customers and
manufacturers. In addition, AmeriSource is typically the primary source of
supply for its customers, delivering on a daily basis. The table below
summarizes how the Company's customer sales mix has changed over the last five
fiscal years.
 
<TABLE>
<CAPTION>
                                                       FISCAL YEAR ENDED SEPTEMBER 30,
                               --------------------------------------------------------------------------------
                                   1990             1991             1992             1993             1994
                                                            (DOLLARS IN MILLIONS)
<S>                            <C>      <C>     <C>      <C>     <C>      <C>     <C>      <C>     <C>      <C>
Hospitals and Managed Care
  Facilities.................  $  844    33%    $1,001    35%    $1,253    38%    $1,554    42%    $1,968    46%
Independents.................   1,108    43%     1,203    43%     1,356    41%     1,397    37%     1,450    34%
Chains.......................     612    24%       623    22%       721    21%       768    21%       884    20%
                               ------   ---     ------   ---     ------   ---     ------   ---     ------   ---
    Total....................  $2,564   100%    $2,827   100%    $3,330   100%    $3,719   100%    $4,302   100%
                               ======   ====    ======   ====    ======   ====    ======   ====    ======   ====
</TABLE>
 
     No single customer represented more than 4% of the Company's total revenues
during fiscal 1994 other than the federal government which, in the aggregate,
accounted for approximately 10%. Excluding the federal government, the Company's
top ten customers represented approximately 15% of total revenues during fiscal
1994. The Company believes it is less dependent on any single customer than its
four largest competitors. A profile of each customer segment follows:
 
     - Hospitals and Managed Care Facilities.  AmeriSource is one of the
nation's top three distributors in serving the hospital and managed care market
segment, which is currently the fastest growing customer segment in the
industry. Because hospitals and managed care facilities purchase large volumes
of high priced, easily handled pharmaceuticals, the Company benefits from quick
turnover of both inventory and receivables and lower than average operating
expenses. The Company intends to continue to focus on the higher growth hospital
and managed care market segment through the use of dedicated facilities and
advanced information systems such as ECHO(TM). As a percentage of total
revenues, sales to hospitals and managed care facilities increased from 33% in
fiscal 1990 to 46% in fiscal 1994, and have grown at a compound rate of 23.6%
over this period.
 
     - Independents.  Independent community pharmacy owners represent the
largest segment of the industry and provide the greatest opportunity for the
Company's value-added services. The Company's sales to independent customers
have risen at a compound rate of 7.0% over the five-year period from fiscal 1990
through fiscal 1994 due to the general growth of this customer segment and to
the success of the Company's customized marketing and merchandising programs,
such as its Family Pharmacy(R) program.
 
                                       29
<PAGE>   30
 
     - Chains.  This category includes chain drug stores, including pharmacy
departments of supermarkets and mass merchandisers. The Company's sales to
chains have risen at a compound rate of 9.6% over the five-year period from
fiscal 1990 through fiscal 1994. This growth rate reflects the results from the
Company entering into new contracts with several drug store chains, offset by
the discontinuance in 1990 and 1991 of certain chain accounts, at the Company's
election, because of their minimal profit contribution. The Company targets the
smaller regional chain business for which the Company can provide higher margin,
value-added services.
 
     Products and Services.  AmeriSource provides services that improve the
operating efficiencies of both its customers and suppliers. In addition, the
Company is typically the primary source of product for its customers, delivering
on a daily basis. The Company continually enhances its services and packages
these services into programs designed to address the special needs of its
various customer segments. These programs include a variety of management,
merchandising and information processing services and programs, that enable
customers to increase sales, reduce costs and compete more effectively. The
Company believes that its broad range of customized services assists in
attracting new customers and developing customer loyalty.
 
     In fiscal 1991, the Company introduced ECHO(TM), a proprietary software
system that provides ordering and inventory management assistance for
pharmaceutical products. The ECHO(TM) system is an interactive computerized
method for reviewing pricing history, placing orders and tracing purchasing
effectiveness. By creating a master file for each customer, the system
automatically updates pricing data, monitors contract compliance, provides
generic and therapeutic equivalent alternative purchase information and suggests
order quantity information based on the customer's historical purchasing levels.
As a result of its success and fast growth among its hospital and managed care
customers, the Company has recently introduced ECHO(TM) to certain of its retail
customers with the goal of increasing the competitiveness and reducing the costs
of its retail pharmacy customers. Since the introduction of ECHO(TM), the
Company has installed approximately 2,000 systems nationwide, 600 of which were
installed in fiscal 1994. The Company believes its installed base of systems is
one of the largest in the wholesale drug industry.
 
     The Family Pharmacy(R) program, another of the Company's customized
services, enables small chain and independent community pharmacies to compete
more effectively. These services include merchandising and pricing information,
shelf labels and plan-o-grams, readily identifiable logos, signs and store
decor, store operations manuals, advertising and promotional campaigns, and
monthly newsletters. The Company also distributes private label vitamins and
health and beauty aids under the Family Pharmacy(R) label, which provides higher
profit margins both to the Company and the retailer. In addition, the Company
negotiates with large health care groups, including third party payors, on
behalf of member-stores for delivery of pharmaceutical benefit programs. The
Family Pharmacy(R) program, initiated in 1982, had 1,169 member-stores as of
December 31, 1991 and has increased its membership to 1,861 member-stores as of
December 31, 1994. The combined member-stores of the Family Pharmacy(R) program
in effect would constitute one of the largest drug chains in the United States.
 
     The Company's Income Rx(R) generic program provides an integral value-added
service to its hospital and retail pharmacist customers by continually reviewing
the marketplace for generic products that offer the best price, quality and
availability. As with the industry, the Company has significantly increased
sales of generic and multi-source pharmaceuticals over the past five years.
Revenues attributable to the sale of generic and multi-source pharmaceuticals
(including sales through the Income Rx(R) program) have increased to
approximately $450 million in fiscal 1994, more than twice what they were in
fiscal 1992. These products generate higher gross profit margins for wholesalers
than branded pharmaceuticals. The Company estimates that industry sales of these
products will double by 1996 due to the number of brands losing patent
protection as well as third party payors' continued emphasis on cost
containment. With the increasing importance of generic pharmaceuticals, the
Income Rx(R) program represents a significant opportunity for growth and
profitability.
 
     For all customer segments, the Company offers its Income RePax(R) program.
Through the Income RePax(R) program, the Company purchases bulk quantities of
certain pharmaceuticals and repackages them into smaller units, which enables
pharmacists to sell pharmaceuticals at prices competitive with those of national
drug chain operations. The Company's repackaging facility, located in
Louisville, Kentucky, is licensed by the FDA and maintains rigid quality control
standards. The Company also operates Health
 
                                       30
<PAGE>   31
 
Services Plus, which is a distributor of oncology and other special purpose
products to clinics and alternate site businesses on a national basis, and Rita
Ann Distributors, which is a distributor of cosmetics and fragrances to the
Company's chain drugstore and other retail customers.
 
     Suppliers.  AmeriSource purchases pharmaceutical and other products from a
number of manufacturers, none of which account for more than approximately 7% of
its purchases. The five largest suppliers in fiscal 1994 accounted for
approximately 27% of total purchases. Historically, the Company has not
experienced difficulty in purchasing desired products from suppliers. The
Company has agreements with many of its suppliers which generally require the
Company to maintain an adequate quantity of a supplier's products in inventory.
The majority of contracts with suppliers are terminable upon 30 days notice by
either party. While each of the Company's operating units on average carries a
broad range of items from approximately 800 suppliers, purchases are
concentrated among the top 25 manufacturers and about 250 items (SKUs). It is
estimated that products from these 25 manufacturers account for approximately
half the total annual sales volume of the Company. The Company believes that its
relationships with its suppliers are good.
 
     Management Information Systems.  The Company has continually invested in
advanced management information systems and automated warehouse technology. For
example, in fiscal 1994, AmeriSource introduced its BOSS warehouse automation
system, a paperless warehouse production program customized to AmeriSource's
unique requirements. Under the BOSS system, merchandise is received, placed in
inventory, retrieved and shipped utilizing customized radio frequency equipment.
The Company's management information systems also provide for, among other
things, electronic order entry by customers, invoice preparation and purchasing
and inventory tracking. As a result of electronic order entry, the costs of
receiving and processing orders have not increased as rapidly as sales volume.
The Company's customized systems strengthen customer relationships by allowing
the customer to lower its operating costs and by providing the basis for a
number of the value-added services the Company provides to its customers,
including marketing data, inventory replenishment, single-source billing,
computer price updates and price labels. AmeriSource believes that its
management information systems are capable of serving its needs for the
foreseeable future.
 
COMPETITION
 
     The Company engages in the wholesale distribution of pharmaceuticals,
health and beauty aids and other products in a highly competitive environment.
The Company competes with numerous national and regional distributors, some of
which are larger and have substantially greater financial resources than the
Company. The Company's national competitors include McKesson Corporation, Bergen
Brunswig Corporation, Cardinal Health, Inc. and FoxMeyer Health Corporation. In
addition, the Company competes with local distributors, direct-selling
manufacturers and other specialty distributors. Competitive factors include
price, service and delivery, credit terms, breadth of product line, customer
support and marketing programs. There can be no assurance that the Company will
not encounter increased competition in the future that could adversely affect
the Company's business. The drug wholesale industry continues to undergo
significant consolidation, with the number of wholesalers in the continental
United States down from 139 at the end of 1980 to approximately 55 as of
December 31, 1994.
 
PROPERTIES
 
     As of December 31, 1994, the Company conducted its business from office and
operating unit facilities at 26 locations throughout the United States. In the
aggregate, AmeriSource's operating units occupy approximately 1.5 million square
feet of office and warehouse space, of which approximately 754,000 square feet
is owned and the balance is leased under lease agreements with expiration dates
ranging from 1995 to 2009. The Company's 16 drug distribution facilities range
in size from approximately 43,600 square feet to 151,000 square feet. Leased
facilities are located in the following states: Kentucky, Massachusetts,
Minnesota, New Jersey, Ohio, Oregon, Pennsylvania, Tennessee and Texas. The
Company has entered into a lease for a distribution facility in California, and
is negotiating a distribution facility lease in Florida. Owned facilities are
located in the following states: Georgia, Indiana, Kentucky, Maryland, Missouri,
Ohio, Pennsylvania, Tennessee and Virginia. The Company utilizes a fleet of
owned and leased vans and trucks, as well as contract
 
                                       31
<PAGE>   32
 
carriers to deliver its products. The Company believes that its properties are
adequate to serve the Company's current and anticipated needs without making
capital expenditures materially higher than historical levels.
 
EMPLOYEES
 
     As of December 31, 1994, the Company employed approximately 2,400 persons,
of which approximately 2,180 were full-time employees. Approximately 11% of full
and part-time employees are covered by collective bargaining agreements. The
Company believes that its relationship with its employees is good.
 
REGULATORY MATTERS
 
     The United States Drug Enforcement Administration, the FDA and various
state boards of pharmacy regulate the distribution of pharmaceutical products
and controlled substances, requiring wholesale distributors of these substances
to register for permits and to meet various security and operating standards. As
a wholesale distributor of pharmaceuticals and certain medical/surgical products
and as a repackager of certain pharmaceutical products, the Company is subject
to these regulations. The Company has received all necessary regulatory
approvals and believes that it is in substantial compliance with all applicable
wholesale distribution requirements.
 
     The Company's former Charleston, South Carolina distribution center was
previously owned by a fertilizer manufacturer. There is evidence of residual
soil contamination remaining from the fertilizer manufacturing process operated
on that site over thirty years ago. The Company engaged an environmental
consulting firm to conduct a soil survey and initiated a groundwater study
during fiscal 1994. The preliminary results of the groundwater study indicate
that there is lead in the groundwater at levels requiring further investigation
and response. A preliminary engineering analysis was prepared by outside
consultants and indicated that if both soil and groundwater remediation are
required, the most likely cost of remediation efforts at the Charleston site is
estimated to be $4.1 million. Accordingly, a liability of $4.1 million was
recorded during fiscal 1994 to cover future consulting, legal and remediation
and ongoing monitoring costs. The Company has notified the appropriate state
regulatory agency from whom approval must be received before proceeding with any
further tests or with the actual site remediation. The approval process and
remediation could take several years to accomplish and the actual costs may
differ from the liability that has been recorded. The accrued liability, which
is reflected in other long-term liabilities on the Company's consolidated
balance sheet, is based on an estimate of the extent of contamination and choice
of remedy, existing technology and presently enacted laws and regulations.
However, changes in remediation standards, improvements in cleanup technology
and discovery of additional information concerning the site could affect the
estimated liability in the future. The Company is investigating the possibility
of asserting claims against responsible parties for recovery of these costs.
Whether or not any recovery may be forthcoming is unknown at this time, although
the Company intends to vigorously enforce its rights and remedies.
 
LEGAL PROCEEDINGS
 
     In November 1993, the Company was named a defendant, along with six other
wholesale distributors and twenty-four pharmaceutical manufacturers, in fourteen
civil actions filed by independent retail pharmacies in the United States
District Court for the Southern District of New York, and in all cases
plaintiffs have established these lawsuits, along with several other suits to
which the Company is not a party, as a class action. In essence, these lawsuits
claim that the manufacturer and wholesaler defendants have combined, contracted
and conspired to fix the prices charged to plaintiffs and class members for
prescription brand name pharmaceuticals. Specifically, plaintiffs claim that the
defendants used "chargeback agreements" to give some institutional pharmacies
discounts that allegedly were not made available to retail drug stores.
Plaintiffs seek injunctive relief, treble damages, attorneys' fees and costs.
These actions have been transferred to the United States District Court for the
Northern District of Illinois for consolidated and coordinated pretrial
proceedings. In March 1995, the Company was named as a defendant, along with
several other wholesale distributors and pharmaceutical manufacturers, in an
additional civil action filed by independent retail pharmacies in the United
States District Court for the Eastern District of Arkansas. Effective October
26, 1994, the Company entered into a Judgment Sharing Agreement with other
wholesaler and pharmaceutical manufacturer
 
                                       32
<PAGE>   33
 
defendants. Under the Judgment Sharing Agreement: (a) the manufacturer
defendants agreed to reimburse the wholesaler defendants for litigation costs
incurred, up to an aggregate of $9 million; and (b) if a judgment is entered
into against both manufacturers and wholesalers, the total exposure for joint
and several liability of the Company is limited to the lesser of 1% of such
judgment or $1 million. In addition, the Company has released any claims that it
might have had against the manufacturers for the claims presented by the
plaintiffs in these lawsuits. The Judgment Sharing Agreement covers the federal
court litigation as well as the cases which have been filed in various state
courts. Plaintiffs have filed a motion to declare the Judgment Sharing Agreement
unenforceable. The Company believes that the plaintiffs' motion is without
merit, and together with the other parties to the Judgment Sharing Agreement,
has filed a memorandum against the plaintiffs' motion.
 
     The Company believes it has meritorious defenses to the claims asserted in
these lawsuits and intends to vigorously defend itself in all of these cases.
 
     The Company has received notices from the Internal Revenue Service
asserting deficiencies in federal corporate income taxes for the Company's
taxable years 1987 through 1991. The notices indicate an aggregate increase in
net taxable income for these years of approximately $24 million and relate
principally to the deductibility of costs incurred with respect to the
Acquisition. The Company has analyzed these matters with tax counsel and
believes it has meritorious defenses to the deficiencies asserted by the
Internal Revenue Service. The Company will contest the asserted deficiencies
through the administrative appeals process and, if necessary, litigation. The
Company believes that any amounts assessed will not have a material effect on
the financial condition of the Company.
 
     The Company is a party to various lawsuits arising in the ordinary course
of business. The Company, however, does not believe that the outcome of these
lawsuits, individually or in the aggregate, will have a material adverse effect
on its business or financial condition.
 
                                       33
<PAGE>   34
 
                                   MANAGEMENT
 
DIRECTORS AND OFFICERS OF THE REGISTRANT
 
     The following table sets forth information concerning the directors and
officers of the Company.
 
<TABLE>
<CAPTION>
               NAME                 AGE                             TITLE
<S>                                 <C>   <C>
John F. McNamara(1)(2)............  59    Chairman, President and Chief Executive Officer
David M. Flowers..................  48    Group President -- Eastern Region
R. David Yost.....................  47    Group President -- Central Region
Kurt J. Hilzinger.................  34    Vice President, Chief Financial Officer and Treasurer
Teresa T. Ciccotelli..............  43    Vice President, Legal Counsel and Secretary
Robert D. Gregory.................  65    Vice President, Human Resources and Assistant Secretary
John A. Kurcik....................  42    Vice President, Controller and Assistant Treasurer
Robert E. McHugh..................  53    Vice President, Marketing
J. Michael McNamara...............  38    Senior Vice President, Sales
Bruce C. Bruckmann................  41    Director
Michael A. Delaney(1).............  40    Director
Richard C. Gozon(3)...............  56    Director
Lawrence C. Karlson(2)............  52    Director
George H. Strong(3)...............  68    Director
James A. Urry(1)..................  41    Director
Barton J. Winokur(1)..............  55    Director
</TABLE>
 
- ---------------
(1) Member of Compensation Committee.
(2) Member of Acquisition Committee.
(3) Member of Audit Committee.
 
     John F. McNamara.  Mr. McNamara has been Chairman, President and Chief
Executive Officer of the Company and AmeriSource since 1989 and has been
President of AmeriSource since 1987. Prior to holding these positions, he was
Chief Operating Officer of AmeriSource from 1986 to 1989 and Executive Vice
President of AmeriSource from 1985 to 1987. He also served as Chairman, from
1986 to 1990, and President, from 1981 to 1986, of the Kauffman-Lattimer
division of AmeriSource. Mr. McNamara served on the executive committee of the
National Wholesale Druggists' Association from 1991 through 1994 and served as
its chairman of the board from November 1993 to November 1994.
 
     David M. Flowers.  Mr. Flowers has been Group President of the Eastern
Region since 1989. Prior to that he was President of the AmeriSource Southeast
Region from 1988 to 1989 and President of the Duff Brothers Division of
AmeriSource from 1984 to 1987.
 
     R. David Yost.  Mr. Yost has been Group President of the Central Region
since 1989. Before serving in these positions he was President, from 1986 to
1989, and Executive Vice President and General Manager, from 1984 to 1986, of
the Kauffman-Lattimer Division of AmeriSource.
 
     Kurt J. Hilzinger.  Mr. Hilzinger has served as Vice President, Chief
Financial Officer and Treasurer since January 1995. Prior to that, he served as
Vice President, Finance and Treasurer since October 1993, and as Vice President,
Financial Planning since March 1991. Before joining the Company, he was a Vice
President in the Corporate Advisory Division of Citicorp from 1986 to 1991.
 
     Teresa T. Ciccotelli.  Ms. Ciccotelli has served as Vice President, Legal
Counsel and Secretary since 1989. Prior to that, from 1985 to 1989, she was an
attorney with Alco Standard Corporation.
 
     Robert D. Gregory.  Mr. Gregory has been Vice President, Human Resources
and Assistant Secretary of the Company since 1989 and Vice President, Human
Resources of AmeriSource since 1986. Prior to that, from 1984 to 1986, he served
as Manager, Employee Relations for Alco Standard Corporation.
 
                                       34
<PAGE>   35
 
     John A. Kurcik.  Mr. Kurcik has been Vice President, Controller and
Assistant Treasurer of the Company since 1989. Mr. Kurcik was Controller, from
1987, and Director of Accounting, from 1985 to 1987, of AmeriSource.
 
     Robert E. McHugh.  Mr. McHugh joined the Company as Vice President,
Marketing in August 1991. Prior to that he was President of J.E. Goold from 1990
to 1991 and Vice President, Industry Affairs of the National Wholesale
Druggists' Association from 1983 to 1990.
 
     J. Michael McNamara.  Mr. McNamara has served as Senior Vice
President-Sales of the Company since November 1994. Previously, he served as
Regional Vice President of the West Central Region of AmeriSource since April
1991. Prior to that he was Vice President, Sales and Marketing of the Company
from 1990 to 1991, Vice President and General Manager of the Toledo Division of
AmeriSource from 1988 to 1990, and Director of Marketing of the Columbus
Division of AmeriSource from 1984 to 1988.
 
     Bruce C. Bruckmann.  Mr. Bruckmann has been a director since August 1992.
Mr. Bruckmann previously was a director of the Company since 1989 and of
AmeriSource since 1988. Mr. Bruckmann resigned as a director of both companies
in December 1991. Mr. Bruckmann is a Managing Director of Bruckmann, Rosser,
Sherrill & Co., Inc. Until January 1995, Mr. Bruckmann was a Managing Director
of Citicorp Venture Capital Ltd. and of Court Square Capital Limited. Mr.
Bruckmann is Chairman of the Board of Polyfibron Technologies, Inc. He serves as
a director of Chromcraft Revington, Inc., Cort Furniture Rental Corporation, New
Cort Holdings Corporation, Mohawk Industries, Inc., Hancor Holding Corp.,
Triumph Group, Inc., Fair Markets, Inc., FF Holdings Corporation and Farm Fresh,
Inc.
 
     Michael A. Delaney.  Mr. Delaney has been a director since January 1995.
Mr. Delaney has been a Vice President of Citicorp Venture Capital Ltd. since
1989. From 1986 through 1989 he was Vice President of Citicorp Mergers and
Acquisitions, an affiliate of VPI. Mr. Delaney is also a director of Sybron
Chemicals, Inc., GVC Holdings, JAC Holdings, DRA International, Enterprise Radio
Corporation and Southern Coil Processing, Inc.
 
     Richard C. Gozon.  Mr. Gozon was elected to the board of directors in 1994.
Mr. Gozon has been Executive Vice President of Weyerhaeuser Company since June
1994. Mr. Gozon formerly was President and Chief Operating Officer of Alco
Standard Corporation from 1988 to 1993. He is also a director of UGI Corp., The
Triumph Group and Nocopi Technologies.
 
     Lawrence C. Karlson.  Mr. Karlson was elected to the board of directors in
1994. Mr. Karlson is Chairman of Karlson Corporation and serves as a director of
Meridian Bank Corp. and CDI Corporation.
 
     George H. Strong.  Mr. Strong was elected to the board of directors in
1994. Mr. Strong is a private investor and serves as a director of Corefunds,
Health South Rehabilitation Corp. and Integrated Health Services, Inc.
 
     James A. Urry.  Mr. Urry has been a director since January 1995. Mr. Urry
has been with Citibank, N.A. since 1981, serving as a Vice President since 1986.
He has been a Vice President of Citicorp Venture Capital Ltd. since 1989. He is
also a director of York International Corp., Cort Furniture Rental Corporation
and New Cort Holdings Corporation.
 
     Barton J. Winokur.  Mr. Winokur has been a director since 1990. Mr. Winokur
is a partner of Dechert Price & Rhoads and serves as a director of CDI
Corporation, FF Holdings Corporation, Farm Fresh, Inc., Davco Restaurants, Inc.
and The Bibb Company.
 
     The directors were appointed to the board of the Company to serve until
their successors are elected and qualified. Each director is a citizen of the
United States. Officers are elected annually by the Board of Directors to serve
for the ensuing year and until their respective successors are elected. There
are no arrangements or understandings between any of the officers and any other
person pursuant to which he or she was elected an officer. J. Michael McNamara,
Senior Vice President-Sales, is the son of John F. McNamara, Chairman, President
and Chief Executive Officer of the Company.
 
                                       35
<PAGE>   36
 
EXECUTIVE COMPENSATION
 
     The following table sets forth, for fiscal years ending September 30, 1992,
1993 and 1994, certain information regarding the cash compensation paid by the
Company, as well as certain other compensation paid or accrued for those years,
to each of the executive officers of the Company, in all capacities in which
they served:
 
<TABLE>
<CAPTION>
                                                                     OTHER ANNUAL         ALL OTHER
  NAME AND PRINCIPAL POSITION     YEAR      SALARY      BONUS(1)     COMPENSATION      COMPENSATION(2)
<S>                               <C>      <C>          <C>          <C>               <C>
John F. McNamara................   1994    $396,609     $200,000            --             $ 8,468(3)
  Chairman, President and          1993     380,340      150,000         $ 110               7,434(3)
  Chief Executive Officer          1992     340,340      185,000            --                  --
David M. Flowers................   1994    $169,430     $100,000            --             $ 8,822(4)
  Group President -- Eastern       1993     159,980       75,000            --               8,428(4)
  Region                           1992     149,480       65,000            --                  --
R. David Yost...................   1994    $179,790     $100,000            --             $ 8,704(5)
  Group President -- Central       1993     170,340       75,000            --               9,079(5)
  Region                           1992     156,840       75,000            --                  --
Kurt J. Hilzinger...............   1994    $137,833     $ 65,000            --             $   985(6)
  Vice President, Chief
     Financial                     1993     124,000       50,000            --                  --
  Officer and Treasurer            1992      99,810       20,000            --                  --
</TABLE>
 
- ---------------
(1) The amounts shown consist of cash bonuses earned in the fiscal year
     identified but paid in the subsequent fiscal year.
 
(2) In accordance with SEC provisions, amounts of All Other Compensation are
     excluded for the Company's 1992 fiscal year.
 
(3) "All Other Compensation" for Mr. McNamara in 1994 and 1993 respectively
     includes the following: (i) $967 and $782 in club dues, (ii) $1,450 and
     $1,200 in tax return preparation fees, (iii) $4,497 and $5,237 in
     contributions under the Company's Employee Investment Plan, (iv) for fiscal
     1994, $1,554 for spousal travel expenses and (v) for fiscal 1993, $215 in
     miscellaneous items.
 
(4) "All Other Compensation" for Mr. Flowers in 1994 and 1993 respectively
     includes the following: (i) $4,175 and $3,191 in club dues, (ii) for fiscal
     1994, $150 for spousal travel expenses, and (iii) $4,497 and $5,237 in
     contributions under the Company's Employee Investment Plan.
 
(5) "All Other Compensation" for Mr. Yost in 1994 and 1993 respectively includes
     the following: (i) $2,311 and $1,692 in club dues, (ii) $1,850 and $2,150
     in tax return preparation fees, (iii) for fiscal 1994, $46 for spousal
     travel expenses, and (iv) $4,497 and $5,237 in contributions under the
     Company's Employee Investment Plan.
 
(6) "All Other Compensation" for Mr. Hilzinger in 1994 includes $985 in
     contributions under the Company's Employee Investment Plan.
 
     Any outside director of the Company is paid an annual fee of $15,000 for
service as a director of the Company, plus an additional fee of $1,000 for
attendance at each meeting of the board of directors in excess of four annually
and $500 per telephonic meeting of the board of directors. There are no fees
paid for attendance at committee meetings. Certain outside directors of the
Company may also be entitled to receive stock options for Common Stock pursuant
to the AmeriSource Non-Employee Directors Stock Option Plan ("Directors Plan").
See "-- Stock Options."
 
STOCK OPTIONS
 
     A total of 61 employees own shares of Common Stock or options to acquire
Common Stock pursuant to the Purchase Plan, the Partners Plan and the 1991
Option Plan. In connection with the Offering, the Company expects to grant
options to acquire Common Stock pursuant to the 1995 Option Plan to 100
employees, several of whom are participants in the Company's other stock option
plans.
 
                                       36
<PAGE>   37
 
     Purchase Plan. As of October 31, 1989, the Company adopted the AmeriSource
Health Corporation and Subsidiaries Employee Stock Purchase Plan (the "Purchase
Plan") to enable certain members of its management (the "Management Investors")
to participate in the equity ownership of the Company on the terms agreed to at
the time of the Acquisition. The Management Investors include Messrs. Flowers,
John McNamara and Yost, other current officers of the Company and additional
members of management of the Company and its subsidiaries. The securities of the
Company subject to the Purchase Plan originally included (a) up to 2,212,500
shares of the Company's Common Stock and (b) $750,000 aggregate principal amount
of the Company's 19 1/2% Junior Subordinated Debentures due 2001 (the "Junior
Subordinated Debentures").
 
     The Management Investors have been subject to restrictions on the sale or
transfer of their Common Stock. Before January 1, 1994, a Management Investor
could not transfer his or her securities except with the consent of the Company
or in connection with specified events, such as the sale of the Company. If a
Management Investor's employment with the Company was terminated, the Company
had the right to repurchase the Common Stock owned or subject to options. VPI is
required, under certain circumstances, to allow the Management Investors to
participate if it proposes to sell shares of the Company's common stock.
 
     As of December 31, 1994, Management Investors had purchased 227,150 shares
of Common Stock under the Purchase Plan and held options to purchase 1,531,603
shares of Common Stock (at an exercise price of $0.07 per share) pursuant to the
Purchase Plan. Of the 1,531,603 shares subject to options, 343,269 shares will
be repurchased from VPI by the Company for $0.34 per share before being issued
pursuant to such options. No further awards will be granted under the Purchase
Plan.
 
     By the terms of the Purchase Plan, the options issued under the Purchase
Plan will expire 90 days after the closing of the Offering. Accordingly, the
Company expects all such options will be exercised during such time period. Upon
exercise of the Purchase Plan options, the holders will be subject to
withholding tax liability based upon the difference between the exercise price
and the estimated fair market value of the Common Stock at the time of exercise.
In lieu of selling shares of Common Stock to satisfy their withholding
requirement, certain members of AmeriSource's management intend to obtain margin
loans secured by the shares of Common Stock acquired pursuant to such options
from Smith Barney Inc. and DLJ. See "Shares Eligible for Future Sale."
 
     Partners Plan. On December 11, 1990, the Company adopted its Partners Stock
Option Plan (the "Partners Plan") to enable employees of the Company other than
the Management Investors to participate in the equity ownership of the Company.
The Partners Plan was intended to distribute the equity ownership more broadly
in order to further incentivize employees. An aggregate of 776,316 shares of
Common Stock was originally available under the Partners Plan. On March 2, 1991,
options ("Partners Options") for an aggregate of 368,160 shares of Common Stock
were granted to 39 optionees, each of whom received options for 9,440 shares. As
of September 30, 1994, there were 339,840 shares subject to options under the
Partners Plan held by 36 optionees. Each Partners Option became 100% exercisable
on September 30, 1994 at an exercise price of $0.34 per share and each was
exercised by December 31, 1994. The Partners Plan originally required the holder
to hold the Common Stock so acquired for two years, but the Company has waived
this holding period requirement. No further awards will be granted under the
Partners Plan. Upon exercise of the Partners Plan options, the holders were
subject to tax liability based upon the difference between the exercise price
and the estimated fair market value for private sales of the Common Stock. To
assist holders of Partners Options with such tax liability, the Company offered
to repurchase from such option holders up to 35% of their shares of Common Stock
obtained through exercise of their options, and did repurchase 107,085 shares at
the estimated fair market price for private sales of the Common Stock.
 
     1991 Stock Option Plan. The Company's 1991 Stock Option Plan (the "1991
Option Plan"), which was adopted by the Board of Directors on February 19, 1992
and approved by the stockholders on April 7, 1992, provides for the granting of
non-qualified stock options to acquire up to an aggregate of 1,069,375 shares of
Common Stock to the Management Investors and certain other members of the
Company's management. Options to acquire the entire 1,069,375 shares of Common
Stock subject to this plan were granted on April 8, 1992.
 
     The options under the 1991 Option Plan once granted to the recipient are
not subject to forfeiture and have an exercise price of $0.34 per share and were
exercisable at a rate of 50% per year on each of January 1,
 
                                       37
<PAGE>   38
 
1993 and January 1, 1994. The options granted, which represent the shares
unallocated under the Purchase Plan and options never granted under a
performance stock option plan originally announced by the Company in 1989,
reflect achievements in operating performance through fiscal 1991. Of the shares
subject to options, 995,625 shares will be repurchased from VPI by the Company
for $0.34 per share pursuant to a prior agreement. As of September 30, 1994,
there were 1,039,875 shares of Common Stock subject to options under the 1991
Option Plan.
 
     Options granted to employees must be exercised by the earlier of November
3, 1999, the date the Company is sold or 90 days after the date of a public
offering. Employees whose employment terminates for reasons other than death,
disability or retirement must hold the shares acquired upon exercise for a
period of three years. The 1991 Option Plan permits, with the consent of the
administering committee and if permitted by the restrictions in the Company's
financing agreements, the exercise of options by delivery of shares of Common
Stock owned by the optionee, by withholding of such shares of Common Stock upon
exercise of the option in lieu of or in addition to cash or by financing made
available by the Company.
 
     The 1991 Option Plan will continue to be administered by the Board of
Directors of the Company until the Company registers the Common Stock under
Section 12 of the Exchange Act of 1934, as amended (the "Exchange Act"),
whereupon, the 1991 Option Plan will be administered by a committee of
Disinterested Persons as defined in the 1991 Option Plan. The Committee will
have the power and authority to determine the extent to which exceptions to the
exercisability of options may be granted, to determine the effect of certain
dispositions or a change in control of the Company on outstanding options, to
establish procedures, loans or financing arrangements to assist in the exercise
of options and the satisfaction of tax withholding obligations, to adopt
regulations to carry out the 1991 Option Plan and to amend options granted under
the plan to carry out the purpose of the 1991 Option Plan.
 
     Because the options issued under the 1991 Option Plan will expire 90 days
after the closing of the Offering, the Company expects all such options will be
exercised during such time period. Upon exercise of the 1991 Option Plan
options, the holders will be subject to withholding tax liability based upon the
difference between the exercise price and the estimated fair market value of the
Common Stock at the time of exercise. In lieu of selling shares of Common Stock
to satisfy their withholding requirement, certain members of AmeriSource's
management intend to obtain margin loans secured by the shares of Common Stock
acquired pursuant to such options from Smith Barney and DLJ. See "Shares
Eligible for Future Sale."
 
     1995 Stock Option Plan. The Company has adopted the 1995 Option Plan, which
will provide for the granting over time of non-qualified stock options to
acquire up to approximately 1.1 million shares (equivalent to 5% of all shares
after giving effect to the Offering and the Option Exercises and subject to
increase of approximately 50,000 shares if the over-allotment option is
exercised in full) of Common Stock to employees of the Company. Such options
will be granted based upon performance and with vesting schedules to be
determined at the time of grant.
 
     The Company expects to grant options to acquire approximately 895,000
shares of Common Stock under the 1995 Option Plan on the effective date of the
Registration Statement of which this Prospectus is a part, at an exercise price
equal to the price to the public set forth on the cover page of this Prospectus.
Messrs. McNamara, Yost, Flowers and Hilzinger are expected to receive options to
acquire 100,000, 65,000, 65,000 and 40,000 shares of Common Stock, respectively,
at such time.
 
     The 1995 Option Plan will be administered by a yet to be determined
committee of directors who are Disinterested Persons as defined in the 1995
Option Plan, which will have the power and authority to determine the employees
to whom awards are granted, the number of shares of Common Stock with respect to
such awards, and the terms of such awards, including the exercise price of the
stock options and any vesting periods. The 1995 Option Plan will contain such
other provisions, terms and conditions as such committee shall decide.
 
     Under the 1995 Option Plan, the exercise price of options will not be less
than the fair market value of the Common Stock on the date of the grant. Options
granted to employees will typically vest over four years and will not be
exercisable after the expiration of six years from the date of the grant or such
sooner date determined by the committee. During the four year period after the
date of grant, 50 percent of the Common Stock acquired upon exercise of a
holder's 1995 Option Plan stock options will not be transferable for a period
 
                                       38
<PAGE>   39
 
of one year after the date of exercise. The 1995 Option Plan will permit, with
the consent of the committee and if permitted by the restrictions in the
Company's financing agreements, the exercise of options by delivery of shares of
Common Stock owned by the optionee, by withholding of such shares of Common
Stock upon exercise of the option in lieu of or in addition to cash or by
financing made available by the Company. The 1995 Option Plan will permit the
committee to accelerate vesting upon a change of control and to adjust the
number and kind of shares subject to options in the event of a reorganization,
merger, consolidation, recapitalization, reclassification, stock split, stock
dividend or combination of shares.
 
     Directors Plan. The Company has adopted the Directors Plan, which will
provide for the granting of stock options on a non-discretionary basis to
certain non-employee directors of the Company. An aggregate of 50,000 shares of
Common Stock have been reserved for issuance under the Directors Plan. The
Directors Plan is expected to provide for automatic grants of an option to
purchase shares of Common Stock to certain non-employee directors who are not
affiliates of VPI on an annual basis, which options will become exercisable over
time. The option exercise price must be equal to 100% of the fair market value
of the Common Stock on the date of grant of the option. Options granted to
directors under the Directors Plan will be treated as nonstatutory stock options
under the Internal Revenue Code, as amended. The Directors Plan will be
administered by a committee of disinterested directors to be determined.
 
     The Directors Plan will permit, with the consent of the committee and if
permitted by the restrictions in the Company's financing agreements, the
exercise of options by delivery of shares of Common Stock owned by the optionee,
by withholding of such shares of Common Stock upon exercise of the option in
lieu of or in addition to cash or by financing made available by the Company.
The Directors Plan will permit the committee to adjust the number and kind of
shares subject to options in the event of a reorganization, merger,
consolidation, recapitalization, reclassification, stock split, stock dividend
or combination of shares. The Board of Directors may amend the Directors Plan at
any time or may terminate any plan without approval of the stockholders;
provided, however, that stockholder approval is required for any amendment to
the plan that increases the number of shares for which options may be granted or
changes in any material respect the limitations or provisions of the options
subject to the plans. However, no action by the Board of Directors or
stockholders may alter or impair any option previously granted to an optionee
without such optionee's consent.
 
VALUE OF UNEXERCISED OPTIONS
 
     The following table sets forth information regarding the number and value
of unexercised options held by the named executive officers of the Company as of
January 31, 1995. None of the named executive officers were granted or exercised
any stock options in fiscal 1994.
 
<TABLE>
<CAPTION>
                                                         NUMBER OF SHARES COVERED BY
                                                       OUTSTANDING OPTIONS AND OPTION
                                                        VALUES AS OF JANUARY 31, 1995
                                          ---------------------------------------------------------
                                                                           VALUE OF UNEXERCISED
                                             NUMBER OF UNEXERCISED             IN-THE-MONEY
                                                  OPTIONS AT                    OPTIONS AT
                                               JANUARY 31, 1995              JANUARY 31, 1995
                                          ---------------------------   ---------------------------
                  NAME                    EXERCISABLE   UNEXERCISABLE   EXERCISABLE(1) UNEXERCISABLE
<S>                                       <C>           <C>             <C>           <C>
John F. McNamara........................    725,700           0         $15,103,650         0
  Chairman, President and Chief
  Executive Officer
David M. Flowers........................    212,400           0           4,425,050         0
  Group President -- Eastern Region
R. David Yost...........................    238,950           0           4,973,600         0
  Group President -- Central Region
Kurt J. Hilzinger.......................     73,750           0           1,523,750         0
  Vice President, Chief Financial
  Officer
  and Treasurer
</TABLE>
 
- ---------------
(1) The value of unexercised in-the-money options is based upon an initial
    public offering price per share of $21.00 (the price to the public set forth
    on the cover of this Prospectus).
 
                                       39
<PAGE>   40
 
COMPENSATION COMMITTEE INTERLOCKS AND INSIDER PARTICIPATION
 
     The Company's Compensation Committee of the Board of Directors during
fiscal 1994 was composed of John F. McNamara, Bruce C. Bruckmann and Barton J.
Winokur. Mr. McNamara is Chairman, President and Chief Executive Officer of the
Company. Mr. Winokur is a partner of Dechert Price & Rhoads, which performed
legal services for the Company during fiscal 1994. Upon consummation of the
Offering, the Compensation Committee will be composed of Michael A. Delaney,
James A. Urry and Barton J. Winokur.
 
AGREEMENTS WITH EMPLOYEES
 
     The Company intends to offer employment contracts to Messrs. McNamara, Yost
and Flowers. The employment contracts are expected to provide for three year
terms of employment, each subject to a one year extension at the Company's
discretion, annual base salaries substantially commensurate with present levels,
and incentive compensation, bonuses and benefits in accordance with the
Company's then prevailing practices.
 
     Each contract is expected to include customary termination for cause
provisions, whereupon the Company's obligations under the respective employment
contract would cease. By a majority vote of the Board of Directors, the Company
would also be able to terminate the employment of the employee without cause,
whereupon the Company would remain obligated to pay the greater of (i) one year
of such employee's then current salary and (ii) the base salary of the employee
for the balance of the term of employment contract. The contracts may also
provide for acceleration of all or a portion of the employee's AmeriSource stock
options then outstanding upon a termination without cause. Each contract is also
expected to prohibit direct and indirect competition with the Company for a
period of one year after termination of employment. The contracts will also
contain customary prohibitions against the disclosure of confidential
information and the solicitation of the Company's employees and customers.
 
     The Company has entered into noncompetition and nondisclosure agreements
with certain officers and key employees of the Company, including Messrs.
McNamara, Yost, Flowers and Hilzinger. The agreements provide that the employee
will not (i) during the course of employment by AmeriSource and for a period of
one year thereafter, engage in any business that directly or indirectly competes
with the Company, and (ii) for a one-year period after termination of
employment, solicit or divert the Company's employees or the business of the
Company's customers. The agreements also provide that the employees will not
disclose confidential information at any time during or after their employment
with the Company.
 
                     CERTAIN RELATIONSHIPS AND TRANSACTIONS
 
     The Company acquired Alco Health Services Corporation, the predecessor to
AmeriSource Corporation, through a two-step acquisition -- a tender offer by the
Company for approximately 92% of AmeriSource Corporation's shares in 1988 and a
merger to acquire the remaining equity interest of AmeriSource Corporation in
1989 (the "Acquisition"). As a result of the tender offer and merger,
AmeriSource Corporation became a wholly-owned subsidiary of the Company.
Approximately $551.4 million was required to consummate the Acquisition and to
pay related fees and expenses. Such funds were derived from borrowings pursuant
to the AmeriSource Corporation senior credit facility, the issuance of
AmeriSource Corporation notes, the Company's issuance of debentures to the
remaining stockholders of AmeriSource Corporation and a capital contribution
from the Company. The Company obtained the funds to make the capital
contribution from the sale of 5,000,000 shares of common stock and borrowings
from an affiliate of VPI, which were refinanced though the issuance of
subordinated indebtedness to VPI.
 
     On July 26, 1993, the Company issued $126.5 million principal amount of its
Senior Debentures in a public offering. Substantially all the net proceeds of
the offering (approximately $122.1 million) were applied to redeem debt of the
Company issued in connection with the Acquisition at a redemption price of 100%
of the principal amount thereof, plus accrued and unpaid interest thereon
through the date of redemption. Contemporaneously, the Company called its 18%
Senior Subordinated Debentures due 2001 (the "Senior Subordinated Debentures")
and the Junior Subordinated Debentures for redemption. As of July 26, 1993, the
Company had outstanding $21.7 million principal amount of Senior Subordinated
Debentures and $39.2 million principal amount of Junior Subordinated Debentures.
On the date of redemption, VPI owned approximately $21.3 million principal
amount of Senior Subordinated Debentures and $37.9 million principal amount of
Junior Subordinated Debentures, certain investors currently or previously
affiliated with VPI owned
 
                                       40
<PAGE>   41
 
$0.4 million principal amount of Senior Subordinated Debentures and $0.8 million
principal amount of Junior Subordinated Debentures, and the Management Investors
owned $0.5 million principal amount of Junior Subordinated Debentures. All the
amounts set forth above include accrued and unpaid interest. As a result of the
redemption of the Senior Subordinated Debentures and the Junior Subordinated
Debentures, VPI, certain investors currently or previously affiliated with VPI
and the Management Investors were paid $59.2 million, $1.2 million and $0.5
million, respectively. See Note 4 to the Financial Statements of the Company
included in this Prospectus.
 
     On October 21, 1991, an involuntary bankruptcy petition under Chapter 7 of
the United States Bankruptcy Code was filed against RDS Acquisition Corp.
("RDS"), which was a customer of the Company. Affiliates of VPI had substantial
equity and debt interests in RDS and related entities. VPI indemnified the
Company for up to $5.8 million of the amounts owed by RDS to the Company on
October 25, 1991, for which the Company did not otherwise recover from RDS. On
July 26, 1993, VPI paid $5.8 million to the Company pursuant to such
indemnification.
 
     Pursuant to a prior arrangement, 343,269 and 995,625 shares of the
Company's Common Stock will be repurchased from VPI by the Company at $0.34 per
share before being issued pursuant to options granted under the Purchase Plan
and the 1991 Option Plan, respectively.
 
     During fiscal years 1992, 1993 and 1994, Dechert Price & Rhoads performed,
and currently does perform, legal services for the Company. Barton J. Winokur, a
partner of Dechert Price & Rhoads and a director of the Company, owns 14,750
shares of the Common Stock of the Company.
 
                                       41
<PAGE>   42
 
                             PRINCIPAL STOCKHOLDERS
 
     The following table sets forth certain information regarding the ownership
of the Company's voting Common Stock and all of the Company's Common Stock, by
each of the Company's directors, all directors and executive officers as a group
and each person who is known by the Company to beneficially own five percent or
more of the Company's voting Common Stock. As of December 31, 1994, after giving
effect to the 2.95-for-1 stock split and the Option Exercises, there would be
3,106,226 shares of the Company's voting Common Stock and 14,612,111 shares of
the Company's total voting and non-voting Common Stock outstanding.
<TABLE>
<CAPTION>
                                                              OWNERSHIP PRIOR TO THE OFFERING
                             --------------------------------------------------------------------------------------------------
                             NUMBER OF                NUMBER OF                NUMBER OF
                              CLASS A                  CLASS B                  CLASS C
                              COMMON     PERCENT OF    COMMON     PERCENT OF    COMMON     PERCENT OF   NUMBER OF
                               STOCK      CLASS A       STOCK      CLASS B       STOCK      CLASS C     ALL SHARES
                             BENEFICIALLY   COMMON    BENEFICIALLY   COMMON    BENEFICIALLY   COMMON    BENEFICIALLY PERCENT OF
                               OWNED       STOCK        OWNED       STOCK        OWNED       STOCK        OWNED      ALL SHARES
<S>                          <C>         <C>          <C>         <C>          <C>         <C>          <C>          <C>
DIRECTORS AND OFFICERS:
John F. McNamara(1)........   725,700       23.4%           --          *           --           *         725,700       5.0%
David M. Flowers(1)........   212,400        6.8            --          *           --           *         212,400       1.5
R. David Yost(1)...........   238,950        7.7            --          *           --           *         238,950       1.6
Kurt J. Hilzinger(1).......    73,750        2.4            --          *           --           *          73,750         *
Bruce C. Bruckmann(2)......     1,681          *        67,632          *           --           *          69,313         *
Michael A. Delaney(2)......        --          *            --          *           --           *              --         *
James A. Urry(2)...........        --          *            --          *           --           *              --         *
Barton J. Winokur..........    14,750          *            --          *           --           *          14,750         *
All directors and executive
  officers as a group (6
  persons)(3)..............  1,267,232      40.8        67,632          *           --           *       1,334,863       9.1
OTHER VOTING 5%
  STOCKHOLDERS:
399 Venture Partners Inc.
  ("VPI")(4)...............   234,926        7.6%     9,786,147      97.6%          --           *      10,021,073      68.6%
 
<CAPTION>
                                 OWNERSHIP AFTER
                              THE OPTION EXERCISES
                             -----------------------
                             NUMBER OF
                               COMMON
                               STOCK      PERCENT OF
                             BENEFICIALLY   COMMON
                               OWNED        STOCK
<S>                          <C>          <C>
DIRECTORS AND OFFICERS:
John F. McNamara(1)........     725,700       3.4%
David M. Flowers(1)........     212,400       1.0
R. David Yost(1)...........     238,950       1.1
Kurt J. Hilzinger(1).......      73,750         *
Bruce C. Bruckmann(2)......      69,313         *
Michael A. Delaney(2)......          --         *
James A. Urry(2)...........          --         *
Barton J. Winokur..........      14,750         *
All directors and executive
  officers as a group (6
  persons)(3)..............   1,334,863       6.3
OTHER VOTING 5%
  STOCKHOLDERS:
399 Venture Partners Inc.
  ("VPI")(4)...............  10,021,073      47.2%
</TABLE>
 
- ---------------
* Less than 1%.
 
(1) Pursuant to the Purchase Plan, Messrs. Flowers, McNamara and Yost received
    options, with limitations on exercise, to acquire 147,500, 442,500 and
    147,500 shares, respectively, of Common Stock. Pursuant to the 1991 Option
    Plan, Messrs. Flowers, McNamara, Yost and Hilzinger received options, with
    limitations on exercise, to acquire 64,900, 283,200, 91,450 and 73,750
    shares, respectively, of Common Stock. All of these options are currently
    exercisable.
 
(2) Messrs. Delaney and Urry disclaim beneficial ownership relating to the
    shares of Common Stock held by VPI.
 
(3) Pursuant to the Purchase Plan and the 1991 Option Plan, executive officers
    received options, with limitations on exercise, to acquire 737,500 shares
    and 513,300 shares, respectively, of voting Common Stock, all of which are
    exercisable currently. In addition, members of AmeriSource's management own
    an aggregate of 387,054 shares of the voting Common Stock and options to
    acquire an aggregate of 2,478,553 shares of the voting Common Stock. All of
    these options are currently exercisable. Certain members of AmeriSource's
    management intend to pledge shares of voting Common Stock in connection with
    margin loans incurred primarily to satisfy certain withholding tax
    liability.
 
(4) VPI disclaims beneficial ownership as to shares of Common Stock held by
    investors currently or previously affiliated with VPI. VPI's address is 1209
    Orange Street, Wilmington, Delaware 19801. VPI is a wholly-owned, indirect
    subsidiary of Citicorp. Pursuant to a prior agreement, the Company will
    repurchase for $0.34 per share, 343,269 shares and 995,625 shares from VPI
    upon exercise of options pursuant to the Purchase Plan and the 1991 Option
    Plan, respectively, for reissuance to management in connection with their
    exercise of options.
 
                                       42
<PAGE>   43
 
                          DESCRIPTION OF CAPITAL STOCK
 
     The following statements are brief summaries of certain provisions relating
to the Company's capital stock and are qualified in their entirety by the
provisions of the Company's Certificate of Incorporation, as amended. The
Company's Certificate of Incorporation, as amended, is an exhibit to the
Registration Statement of which this Prospectus is a part.
 
COMMON STOCK
 
     The currently authorized Common Stock of the Company consists of 50,000,000
shares of Class A Common Stock, 15,000,000 shares of Class B Common Stock and
2,000,000 shares of Class C Common Stock. As of December 31, 1994, without
giving effect to the 2.95-for-1 stock split and the Option Exercises, 238,262
shares of Class A Common Stock, 3,854,163 shares of Class B Common Stock and
500,000 shares of Class C Common Stock were issued and outstanding. As of
December 31, 1994, after giving effect to the 2.95-for-1 stock split and the
Option Exercises, 3,106,225 shares of Class A Common Stock, 10,030,886 shares of
Class B Common Stock and 1,475,000 shares of Class C Common Stock would have
been issued and outstanding. Upon completion of the Offering, the Company will
have 21,212,111 shares of Common Stock outstanding (22,202,111 shares if the
over-allotment option is exercised). Class A Common Stock is referred to
elsewhere in this Prospectus as "Common Stock."
 
     There is no established public trading market for the Class A Common Stock
and Class B Common Stock. As of December 31, 1994, the Class A Common Stock was
held by 60 holders of record, and the Class B Common Stock was held by 11
holders of record. As of September 30, 1994, the Class C Common Stock was held
by approximately 12 holders of record. The Class C Common Stock trades on a
limited basis in the over-the-counter market. Information concerning the
historical trading prices for Class C Common Stock is not published by
nationally-recognized independent sources.
 
     Contemporaneously with and subject to the completion of the Offering made
hereby, all outstanding shares of Common Stock and all options to acquire shares
of the Company's Common Stock will be adjusted for a 2.95-for-1 stock split. No
fractional shares of Common Stock will be issued in connection with the stock
split. Each holder of Common Stock will receive a cash payment in lieu of a
fractional share to which such holder would otherwise be entitled pursuant to
the stock split in the amount of the value of the fractional share at the
offering price to the public.
 
     Class A Common Stock.  Holders of Class A Common Stock are entitled to one
vote per share on all matters on which holders of Class A Common Stock are
entitled to vote and have no cumulative voting rights. Holders of Class A Common
Stock do not have the preemptive right to subscribe for shares of Class A Common
Stock issued by the Company, nor do they have any redemption rights. Holders of
Class A Common Stock may elect at any time to convert any and all such shares
into Class B Common Stock, on a share-for-share basis. Holders of Class A Common
Stock are entitled to receive such dividends, if any, as may from time to time
be declared by the Board of Directors of the Company out of funds legally
available therefor. The Credit Agreement contains limitations on the Company's
ability to pay dividends to its stockholders. See "Dividend Policy."
 
     Upon liquidation, dissolution or winding up of the Company, holders of
Class A Common Stock are entitled to a pro rata share of the distribution of
assets remaining after the payment of debts and expenses and after payment of
the liquidation preference accorded to the holders of any preferred stock of the
Company which may be issued in the future. Each share of Class A Common Stock
has the same rights, privileges and preferences as every other share of Class A
Common Stock. Shares of the Class A Common Stock to be issued pursuant to the
Offering, when issued and paid for, will be fully paid and nonassessable. The
transfer agent and registrar for the Class A Common Stock is Mellon Securities
Trust Company.
 
     Class B Common Stock.  The rights of holders of Class B Common Stock and
holders of Class A Common Stock are identical and entitle the holders thereof to
the same rights, privileges, benefits and notices, except as otherwise described
herein. Holders of Class B Common Stock generally do not possess the right to
vote on any matters to be voted upon by the stockholders of the Company, except
as provided by law. Under
 
                                       43
<PAGE>   44
 
Section 242(b)(2) of the Delaware General Corporation Law, the holders of the
Class B Common Stock shall be entitled to vote as a class upon any proposed
amendment to the Company's Certificate of Incorporation, if such amendment would
increase or decrease the number of shares or the par value of the shares of such
class, or alter or change the powers, preferences or special rights of the
shares of such class so as to affect them adversely. Holders of Class B Common
Stock may elect at any time to convert any and all of such shares into Class A
Common Stock, on a share-for-share basis, to the extent the holder thereof is
not prohibited from owning additional voting securities by virtue of regulatory
restrictions.
 
     Class C Common Stock.  The rights of holders of Class C Common Stock and
holders of Class A Common Stock are identical and entitle the holders thereof to
the same rights, privileges, benefits and notices, except as otherwise described
herein. Holders of Class C Common stock generally do not possess the right to
vote on any matters to be voted upon by the stockholders of the Company, except
as provided by law. Under Section 242(b)(2), of the Delaware General Corporation
Law, the holders of the Class C Common Stock shall be entitled to vote as a
class upon any proposed amendment to the Company's Certificate of Incorporation
if such amendment would increase or decrease the number of shares or the par
value of the shares of such class, or alter or change the powers, preferences or
special rights of the shares of such class so as to affect them adversely. The
Class C Common Stock is subject to substantial restrictions on transfer and has
certain registration and "take-along" rights. A share of Class C Common Stock
will automatically be converted into a share of Class A Common Stock (a)
immediately prior to its sale in a future public offering or (b) at such time as
such share of Class C Common Stock has been sold publicly after the Offering in
a transaction that complies with any maximum quantity limitations applicable to
such sale. Once a share of Class C Common Stock has been converted into Class A
Common Stock it will no longer be subject to any restrictions on transfer nor
will it be entitled to the benefits of registration and take-along-rights.
 
SECTION 203 OF THE DELAWARE GENERAL CORPORATION LAW
 
     Section 203 of the Delaware General Corporation Law prevents an "interested
stockholder" (defined in Section 203, generally, as a person owning 15% or more
of a corporation's outstanding voting stock) from engaging in a "business
combination" (defined in Section 203, generally, as mergers, asset sales and
other transactions resulting in a financial benefit to the interested
stockholder) with a publicly-held Delaware corporation for three years following
the date such person became an interested stockholder unless (i) before such
person became an interested stockholder, the board of directors of the
corporation approved either the business combination or the transaction that
resulted in the interested stockholder becoming an interested stockholder; (ii)
upon consummation of the transaction that resulted in the interested stockholder
becoming an interested stockholder, the interested stockholder owns at least 85%
of the voting stock of the corporation outstanding at the time the transaction
commenced (excluding stock held by directors who are also officers of the
corporation and by employee stock plans that do not provide employees with the
rights to determine confidentially whether shares held subject to the plan will
be tendered in a tender or exchange offer); or (iii) following the transaction
in which such person became an interested stockholder, the business combination
is approved by the board of directors of the corporation and authorized at a
meeting of stockholders by the affirmative vote of the holders of two-thirds of
the outstanding voting stock of the corporation not owned by the interested
stockholder. The Company will opt out of Section 203 prior to the Offering, but
this will not be effective until one year after the Offering. Accordingly, the
provisions of Section 203 will apply to the Company for approximately one year
following the consummation of the Offering.
 
                                       44
<PAGE>   45
 
             DESCRIPTION OF INDEBTEDNESS AND SECURITIZATION PROGRAM
 
THE CREDIT AGREEMENT
 
     On December 13, 1994, the Company amended its existing credit agreement
with a syndicate of senior lenders providing a senior secured credit facility of
$380 million. As a result of the amendment, the effective interest rate on
borrowings under the Credit Agreement have been reduced by 100 basis points. In
addition, among other things, the amendment (i) extended the term of the
original credit agreement until January 3, 2000; (ii) provided interest rate
stepdowns upon the occurrence of certain events; (iii) modified the borrowing
base availability from inventory- and receivable-based to inventory-based; and
(iv) increased the Company's ability to make acquisitions and pay dividends.
 
     The senior lenders under the Credit Agreement consist of a group of 13
financial institutions with General Electric Capital Corporation ("GECC") acting
as the administrative agent for the group. The maximum amount that may be
borrowed under the Credit Agreement is limited to the extent of a sufficient
borrowing base (up to a maximum of $380 million), which is essentially 65% of
eligible inventory in fiscal year 1995, 62.5% of eligible inventory in fiscal
year 1996, and 60% of eligible inventory thereafter. As of January 31, 1995, the
Company's borrowing base was approximately $387.5 million.
 
     The Credit Agreement will terminate, the commitment of the syndicate to
make revolving credit loans expire, and any outstanding loans thereunder must be
repaid in full, on January 3, 2000. Indebtedness under the Credit Agreement may
be prepaid, although such indebtedness may be subsequently reborrowed. The
indebtedness under the Credit Agreement may be permanently repaid in full at any
time at the option of the Company, without premium or penalty, upon prior
written notice to GECC, and the credit facility may be permanently reduced in
part at any time and from time to time at the option of the Company, without
premium or penalty, upon prior written notice and in certain minimum amounts.
 
     At the Company's option, borrowings under the Credit Agreement bear
interest at a rate per annum determined as follows: (i) a LIBOR rate, adjusted
for statutory reserves and assessments, plus 2.25% or (ii) the applicable prime
rate of interest most recently published or announced from time to time in
effect on such day, plus 1%. The margins relative to interest rates for
borrowings under the Credit Agreement are subject to stepdown reduction of up to
1.00% if the Company (i) meets certain interest coverage tests or (ii) obtains
at least $100 million of aggregate gross cash proceeds from the sale of equity
securities of the Company and meets certain debt-to-earnings tests. Interest on
loans under the Credit Agreement is payable quarterly or, if earlier, at the end
of the applicable interest period loan intervals. The interest rates under the
Credit Agreement are subject to reduction upon the occurrence of certain events
including improved financial performance and the sale of certain minimum equity
amounts by the Company.
 
     Under the terms of the Credit Agreement, the Company granted the senior
lenders a perfected first priority security interest in substantially all of the
Company's assets (except accounts receivable and certain related assets),
including, without limitation, real property, fixed assets, equipment,
inventory, stock of subsidiaries, trademarks and intangible assets, to secure
its borrowings under the Credit Agreement.
 
     The Credit Agreement contains numerous restrictive financial and other
covenants, including without limitation: (i) restrictions on the incurrence of
indebtedness, guaranteed indebtedness, leases, liens and contingent obligations;
(ii) restrictions on mergers, acquisitions, sales of assets, investments,
employee loans and transactions with affiliates; (iii) restrictions on
distributions and dividends to the Company's stockholders and changes in the
capital structure of the Company; (iv) restrictions on optional redemptions,
prepayments, distributions, cancellations and modifications with respect to
other debt; (v) restrictions on capital expenditures; (vi) restrictions with
respect to environmental matters and employee benefit plan obligations; (vii)
restrictions on speculative transactions; (viii) restrictions on modifications
to compensation plans, lock box account and tax sharing arrangements, business
type and fiscal year-end; and (ix) financial tests, including, among others,
those measuring AmeriSource's tangible net worth, current ratio, and interest
coverage ratio. The Credit Agreement restricts the payment of dividends and the
making of loans by AmeriSource to the Company and, consequently, the Company's
ability to pay cash interest on the Senior Debentures and its ability to make
the mandatory repurchase of the Senior Debentures required by the Issuer
Indenture upon a Change in Control (as defined below).
 
                                       45
<PAGE>   46
 
     The events of default under the Credit Agreement include, among others: (i)
any failure of the Company to pay principal or interest thereunder when due;
(ii) the breach by the Company of covenants, representations or warranties
contained in the Credit Agreement; (iii) any failure to pay amounts due under
certain other indebtedness or contingent obligations of the Company, or defaults
that result in or permit the acceleration of certain other indebtedness or
contingent obligations of the Company; (iv) certain events of bankruptcy,
insolvency or dissolution of the Company; (v) the incurrence of certain
pension-related liabilities; (vi) the existence of certain undischarged
judgments or decrees against the Company that remain unstayed for 30 consecutive
days; (vii) the occurrence of a Material Adverse Effect (as such term is defined
in the Credit Agreement), other than changes in the value of the collateral
granted in connection with the Credit Agreement and changes in the financial
condition of the Company that affect or will affect the calculations made under
the financial covenants in the Credit Agreement, but do not create or would be
reasonably expected to create a breach or default under any such financial
covenants; (viii) the failure or invalidity of any provision of the collateral
documents delivered in connection with the Credit Agreement or any security
interest granted to the senior lenders thereby; (ix) a Liquidation Event (as
defined in the Receivables Program (as defined herein) documents), and certain
material miscalculations, misrepresentations or breaches of warranties made in
connection with the Receivables Program; and (x) the occurrence of a Change in
Control Date, defined in the Credit Agreement as when (a) the Company shall fail
to own and control 100% of the issued and outstanding stock of AmeriSource, with
certain exceptions relating to a Qualified Public Offering (as defined in the
Credit Agreement) of the Company's common stock or (b) VPI, VPI's employees,
VPI's affiliates and the Company's employees fail to own and control, in the
aggregate, 50% of the issued and outstanding stock of the Company, with certain
exceptions relating to a Qualified Public Offering of the common stock of the
Company.
 
     The Company is required to pay a commitment fee of 1/2 of 1% per annum on
the average unused portion of the credit facility, subject to stepdown
reductions to a minimum of 1/4 of 1% per annum if the Company meets certain
interest coverage tests or obtains aggregate gross proceeds of $100 million from
the sale of equity securities of the Company and meets certain debt-to-earnings
tests. The Company must also pay an annual administrative agent's fee of
$150,000 to GECC, payable in advance for each year.
 
     At January 31, 1995, the $344.8 million outstanding under the Credit
Agreement bore interest at an effective rate of 8.74% per annum. Initial
borrowings under the original Credit Agreement were used to extinguish the
obligations outstanding under the Company's predecessor revolving credit
facility, which was due to expire in December 1993.
 
RECEIVABLES SECURITIZATION PROGRAM
 
     In the first quarter of fiscal 1995, the Company sold substantially all of
its trade accounts receivable and notes receivable to ARC pursuant to the
Receivables Program. Contemporaneously, the Company entered into a Receivables
Purchase Agreement with ARC, whereby the Company agreed to sell, and ARC agreed
to purchase on a continuous basis Receivables originated by the Company.
Pursuant to the Receivables Program, ARC transfers such Receivables to a master
trust in exchange for, among other things, Certificates. Contemporaneously,
variable principal Certificates in an aggregate principal amount of up to $230
million face amount were sold to a group of financial institutions. The Company
has accounted for the transactions contemplated by the terms of the Receivables
Purchase Agreement as a sale of Receivables from AmeriSource to ARC and as a
financing transaction by ARC on the Company's consolidated financial statements.
The Certificates represent fractional undivided interests in the Receivables and
other assets of the master trust, and do not otherwise represent recourse
obligations of the Company. During the initial five-year term of the Receivables
Program, the cash generated by collections on the Receivables will be used to
purchase, among other things, additional Receivables originated by the Company
and/or repay the Certificates. The Certificates bear interest at a rate selected
by the Company equal to (i) the higher of (a) the prime lending rate of Bankers
Trust Company and (b) the federal funds rate plus 50 basis points or (ii) LIBOR
plus 50 basis points. The interest rates for the Certificates are subject to the
following step-ups: (i) with respect to the ABR tranche (based on the higher of
the prime rate or federal funds rate plus 50 basis points), an additional 50
basis points beginning one year after the closing date (December 13, 1994) and
(ii) with respect to the
 
                                       46
<PAGE>   47
 
LIBOR tranche, an additional 12 1/2 basis points beginning six months after the
closing date, an additional 12 1/2 basis points beginning nine months after the
closing date, and an additional 75 basis points beginning one year after the
closing date. ARC is currently negotiating the terms of new Certificates that do
not contain an interest step-up feature, a majority of which will be fixed
principal, variable rate obligations and the remainder of which will be variable
principal, variable rate obligations. The Company expects to enter into interest
rate protection contracts with respect to a majority of the fixed principal,
variable rate obligations. Given existing market conditions, the Company expects
that such interest rate contracts will apply to in excess of $150 million of the
new Certificates, will be for a term of approximately two years and will cap the
related variable interest rates at approximately 8%. Such new Certificates are
expected to be issued shortly and will, among other things, refinance the
existing Certificates. None of the Certificates have been registered under the
Securities Act, and the Certificates may not be offered or sold in the United
States absent registration or an applicable exemption from the registration
requirements. At February 28, 1995, the amount of the Certificates outstanding
was $212 million.
 
     According to its terms, the Receivables Program is expected to liquidate
beginning in October 1999, whereupon the payment of the then-outstanding
principal of the Certificates will commence. The Certificates are also subject
to early liquidation upon the occurrence of certain events. In the event of a
liquidation, losses on Receivables will first be absorbed by the residual
certificate held by ARC and collections on Receivables will first be allocated
to make payments of outstanding principal of the Certificates in accordance with
their ratable interests in the assets of the master trust, after giving effect
to the allocation of losses to the residual interest.
 
     Contemporaneous with the consummation of the Receivables Program and the
execution of the amendment to the Credit Agreement, the Company called for
optional redemption all of the outstanding Notes at a redemption price of 106%
of the principal amount plus accrued interest through the redemption date of
January 12, 1995. The Notes were redeemed on January 12, 1995.
 
THE SENIOR DEBENTURES
 
     On July 26, 1993, the Company issued $126.5 million principal amount of its
Senior Debentures in a public offering. Interest on the Senior Debentures is
payable semi-annually on January 15 and July 15 of each year. Through and
including the semi-annual interest payment due July 15, 1998, the Company may
elect, at its option, to issue additional Senior Debentures in satisfaction of
its interest payment obligations. The Senior Debentures are senior unsecured
obligations of the Company and rank pari passu in right of payment with all
senior borrowings of the Company and rank senior in right of payment to all
subordinated indebtedness of the Company. As indebtedness of the Company, the
Senior Debentures are structurally subordinated to all indebtedness and other
obligations of AmeriSource. Substantially all the net proceeds of the Senior
Debenture offering (approximately $122.1 million) were applied to redeem the
Senior Subordinated Debentures, the Company's 18 1/2% Subordinated Debentures
due 2004 and the Junior Subordinated Debentures at a redemption price of 100% of
the principal amount thereof, plus accrued and unpaid interest thereon to the
date of redemption.
 
     The indenture relating to the Senior Debentures contains restrictions
relating to, among other things, the payment of dividends, the repurchase of
stock and the making of certain other restricted payments, the incurrence of
additional indebtedness and the issuance of preferred stock, the creation of
certain liens, certain asset sales, transactions with subsidiaries and other
affiliates, dividends and other payment restrictions affecting subsidiaries, and
mergers and consolidations.
 
     The Issuer Indenture provides that in the event of a "Change in Control"
(as defined below), the Company will be obligated to make an offer to repurchase
all outstanding Senior Debentures at a purchase price equal to 101% of the
principal amount thereof, plus accrued and unpaid interest to the purchase date,
provided, that transactions with affiliates, including transactions that
increase the debt of the Company, may not result in a change in control. "Change
in Control" is defined in the Issuer Indenture as any transaction or series of
transactions the result of which (i) any party or group other than VPI, the
Management Investors or their respective related parties or affiliates becomes
the beneficial owner of more than 50% of the aggregate voting power (on a fully
diluted basis) of the Company or (ii) during any two consecutive calendar years,
 
                                       47
<PAGE>   48
 
individuals who at the beginning of such period constituted the Company's Board
of Directors (together with new directors approved by a majority of such
directors) cease for any reason to constitute a majority of the directors then
in office. Except under certain circumstances in connection with a public equity
offering, the Senior Debentures may not be redeemed prior to July 15, 1998. On
or after July 15, 1998, the Company may, at its option, redeem the Senior
Debentures in whole or in part at redemption prices of 105.62% (if redeemed
during the 12-month period beginning July 15, 1998), 102.81% (if redeemed during
the 12-month period beginning July 15, 1999), and 100% (if redeemed thereafter),
plus accrued and unpaid interest to the date of redemption. The Issuer Indenture
also provides that, at any time prior to July 26, 1997, the Company may, at its
option within 60 days of the Public Offering Consummation Date (as defined in
the Issuer Indenture), redeem up to one-half of the Senior Debentures then
outstanding with the net proceeds from one or more "Public Equity Offerings"
(defined in the Issuer Indenture as any underwritten public offering of equity
securities of the Company pursuant to a registration statement filed pursuant to
the Securities Act of 1933, as amended (the "Securities Act")) at 110%;
provided, that at least one-half of the aggregate principal amount of the Senior
Debentures originally issued must remain outstanding immediately after any such
redemption. The Company intends to use a portion of the proceeds of the Offering
to redeem Senior Debentures. See "Use of Proceeds."
 
                        SHARES ELIGIBLE FOR FUTURE SALE
 
     Upon completion of the Offering, the Company will have outstanding
21,212,111 shares of Common Stock. The 6,600,000 shares of Common Stock to be
sold in the Offering made hereby will be freely tradeable without restriction
under the Securities Act, unless acquired by an "affiliate" of the Company
(defined in Rule 144 under the Securities Act, generally, as a person who, by
virtue of equity ownership or otherwise, controls, or is controlled by, or is
under common control with, the Company). The remaining 14,612,111 shares
outstanding, excluding the shares of Class C Common Stock, upon completion of
the Offering will be "restricted securities" as defined in Rule 144, absent
registration of such shares under the Securities Act. The Company intends to
file Form S-8 Registration Statements to register shares of Common Stock
acquired by members of management pursuant to the exercise of options under the
Purchase Plan, the 1991 Option Plan and the Partners Plan.
 
     Shares of Common Stock held by affiliates and restricted securities may not
be sold unless they are registered under the Securities Act or are sold pursuant
to an applicable exemption from registration, including the exemption from
registration set forth in Rule 144 promulgated by the Securities and Exchange
Commission (the "Commission"). Generally, Rule 144 will permit an affiliate or a
person who has held restricted securities for more than two years to sell within
any three-month period a number of shares that does not exceed the greater of 1%
of the then outstanding shares of Common Stock or the average weekly trading
volume of such stock during the four calendar weeks preceding such sale,
provided that the Company has either filed certain periodic reports with the
Commission or made publicly available certain information concerning it and
provided that such sales are made in normal "brokers' transactions" or in
transactions directly with a "market maker" without the solicitation of buy
orders by the brokers or such affiliates. A person who is deemed not an
affiliate of the Company at any time during the three months preceding a sale
and who has held restricted securities for more than three years may sell such
shares under Rule 144 without regard to the volume limitations described.
 
     The Common Stock is traded on the Nasdaq National Market under the symbol
"ASHC." Sales of substantial amounts of Common Stock in the public market under
Rule 144 could have a depressive effect on the price of the Common Stock. VPI,
certain current and former affiliates of VPI, current and former employees and
directors of AmeriSource, and the Management Investors hold their shares of
Company common stock subject to certain restrictions on sales and transfers,
including restrictions on sales in the public market. The holders of Class C
Common Stock may sell in the public market after 90 days following the closing
of the Offering, in which event their shares are automatically converted into
Common Stock, provided that for 270 days after such 90-day period, any sales
must meet the maximum quantity limitations and other requirements of Rule 144
set forth above. See "Management -- Stock Purchase Plan."
 
                                       48
<PAGE>   49
 
     The Existing Stockholders were granted piggyback registration rights with
respect to the Common Stock when they purchased their shares. After the
Offering, an aggregate of 14,612,913 shares of Common Stock owned by the
Existing Stockholders will be entitled to piggyback registration rights. In
addition, VPI, which will hold in the aggregate 10,021,073 shares of Common
Stock after the Offering, has been granted demand rights to require the
registration of its shares. The Existing Stockholders (other than VPI and
certain current officers and directors of the Company, who have agreed to
restrictions for a 180-day period as discussed below) are subject to
restrictions on public sale or distribution for a period of 90 days following
the effective date of the Registration Statement.
 
     VPI and directors and members of AmeriSource's management holding, in the
aggregate, approximately 12.8 million shares of Common Stock have agreed not to
file, or cause the Company to file, a registration statement with respect to,
enter into any agreement providing for or effect any public sale, public
distribution or other public disposition of shares of capital stock of the
Company, including any sale pursuant to Rule 144 or Rule 144A promulgated under
the Securities Act, for a period of 180 days following the closing date of the
Offering without the prior written consent of DLJ. Such investors have further
agreed that they will not otherwise dispose of any shares of capital stock of
the Company unless the person to whom such disposition is made agrees to
substantially the same as the foregoing. A total of approximately 1.8 million
shares of Common Stock currently outstanding (excluding the shares sold in the
Offering) are not subject to the 180-day restriction; however, all such shares
are subject to restrictions on public sale or distribution for a period of 90
days as described above.
 
     Upon exercise of options granted under the Purchase Plan and 1991 Option
Plan, the holders will be subject to withholding tax liability based upon the
difference between the exercise price and the estimated fair market value of the
Common Stock at the time of exercise. In lieu of selling shares of Common Stock
to satisfy their withholding requirement, certain members of AmeriSource's
management intend to obtain margin loans from Smith Barney Inc. and DLJ. In
connection with such margin loans, such management have each agreed to pledge
the shares of Common Stock acquired pursuant to exercise of such options as
collateral for the margin loans. Under certain circumstances, Smith Barney Inc.
and DLJ may foreclose on and sell such pledged Common Stock, and such sales may
occur in the 180-day period following the closing of the Offering.
 
                CERTAIN UNITED STATES FEDERAL TAX CONSIDERATIONS
                      FOR NON-U.S. HOLDERS OF COMMON STOCK
 
     The following discussion concerns the material United States federal income
and estate tax consequences of the ownership and disposition of Common Stock
applicable to Non-U.S. Holders of such Common Stock. In general, a "Non-U.S.
Holder" is any person other than (i) a citizen or resident of the United States,
(ii) a corporation or partnership created or organized in the United States or
under the laws of the United States or of any State, or (iii) an estate or trust
that is subject (or potentially subject) to U.S. federal income tax on its
worldwide income on a net basis. The discussion is based on current law and is
for general information only. The discussion does not address aspects of federal
taxation other than income and estate taxation (such as, for example, gift taxes
and generation skipping transfer taxes) and does not address all aspects of
federal income and estate taxation. The discussion does not consider any
specific facts or circumstances that may apply to a particular Non-U.S. Holder.
Accordingly, prospective investors are urged to consult their tax advisors
regarding the United States federal, state, local and non-U.S. income and other
tax consequences of holding and disposing of shares of Common Stock.
 
     Dividends. In general, dividends paid to a Non-U.S. Holder will be subject
to United States withholding tax at a 30% rate (or any lower rate prescribed by
an applicable tax treaty) unless the dividends are either (i) effectively
connected with a trade or business carried on by the Non-U.S. Holder within the
United States, or (ii) if a tax treaty applies, attributable to a United States
permanent establishment maintained by the Non-U.S. Holder. Dividends effectively
connected with such a trade or business or attributable to such a permanent
establishment will generally not be subject to withholding (if the Non-U.S.
Holder files certain forms with the payor of the dividend) and will generally be
subject to United States federal income tax at the same rates applicable to U.S.
holders. In the case of a Non-U.S. Holder that is a corporation, such
effectively connected income or income attributable to a permanent establishment
also may be subject to the branch profits tax (which is generally imposed on a
foreign corporation on the repatriation from the United States of effectively
 
                                       49
<PAGE>   50
 
connected earnings and profits) unless imposition of the branch profits tax is
precluded by a treaty. To determine the applicability of a tax treaty providing
for a lower rate of withholding on dividends that are neither effectively
connected income nor attributable to a permanent establishment, dividends paid
to an address in a foreign country are presumed under current Treasury
regulations to be paid to a resident of that country, unless the Company has
definite knowledge that such presumption is not warranted or an applicable
treaty (or United States Treasury regulations thereunder) requires some other
method for determining a Non-U.S. Holder's residence. Proposed Treasury
regulations that are not currently effective would, if finally adopted, require
Non-U.S. Holders to file certain forms to obtain the benefit of an applicable
tax treaty providing for a lower rate of withholding tax on dividends. Such
forms would contain the holder's name and address and an official statement by
the competent authority in the foreign country (as designated in the applicable
tax treaty) attesting to the holder's status as a resident thereof.
 
     Sale of Common Stock.  Generally, a Non-U.S. Holder will not be subject to
United States federal income tax on any gain realized upon the disposition of
his Common Stock unless (i) the Company is or has been a "U.S. real property
holding corporation" for federal income tax purposes (which the Company does not
believe that it is or is likely to become); (ii) the gain is effectively
connected with a trade or business carried on by the Non-U.S. Holder within the
United States or, if a tax treaty applies, attributable to a permanent
establishment maintained by the Non-U.S. Holder in the United States; (iii) in
the case of a Non-U.S. Holder who is an individual, the Non-U.S. Holder holds
the shares as a capital asset and is present in the United States for 183 days
or more in the taxable year of the disposition and certain other conditions are
satisfied; or (iv) the Non-U.S. Holder is subject to tax pursuant to the
provisions of U.S. tax law applicable to certain United States expatriates.
 
     Estate Tax.  Common Stock owned or treated as owned by an individual who is
not a citizen or resident (as defined for United States federal estate tax
purposes) of the United States at the time of death will be includible in the
individual's gross estate for United States federal estate tax purposes, unless
an applicable tax treaty provides otherwise, and may be subject to United States
federal estate tax.
 
     Backup Withholding and Information Reporting.  The Company generally must
report annually to the Internal Revenue Service and to each Non-U.S. Holder the
amount of dividends paid to, and the tax withheld with respect to, each Non-U.S.
Holder. These reporting requirements apply regardless of whether withholding was
reduced or eliminated by an applicable tax treaty. Copies of these information
returns also may be made available under the provisions of a specific treaty or
agreement to the tax authorities in the country in which the Non-U.S. Holder
resides. United States backup withholding tax (which generally is a withholding
tax imposed at the rate of 31% on certain payments to persons that fail to
furnish the information required under the United States information reporting
requirements) will generally not apply to dividends paid on Common Stock to a
Non-U.S. Holder at an address outside the United States.
 
     The payment of the proceeds from the disposition of Common Stock to or
through the United States office of a broker will be subject to information
reporting and backup withholding unless the owner certifies, among other things,
its status as a Non-U.S. Holder (and the broker does not have knowledge to the
contrary), or otherwise establishes an exemption. The payment of the proceeds
from the disposition of Common Stock to or through a non-U.S. office of a
non-U.S. broker will generally not be subject to information reporting (except
under the circumstances described in the following sentence) and, under current
temporary regulations, will not be subject to backup withholding. Information
reporting will apply to dispositions through (a) a non-U.S. office of a U.S.
broker and (b) a non-U.S. office of a non-U.S. broker that is either a
"controlled foreign corporation" for United States federal income tax purposes
or a person 50% or more of whose gross income from all sources for a certain
three year period was effectively connected with a United States trade or
business unless the broker has documentary evidence in its files that the owner
is a Non-U.S. holder (and does not have actual knowledge to the contrary).
Moreover, under proposed regulations, back-up withholding would also apply to
proceeds from such dispositions if such broker had actual knowledge that the
payee is a U.S. person.
 
     The backup withholding and information reporting rules are currently under
review by the Treasury Department and their application to the Common Stock is
subject to change.
 
                                       50
<PAGE>   51
 
                                  UNDERWRITING
 
     Subject to certain terms and conditions contained in the Underwriting
Agreement, the United States underwriters named below (the "U.S. Underwriters"),
for whom DLJ, Smith Barney Inc. and BT Securities Corporation are acting as
representatives (the "U.S. Representatives"), and the international underwriters
named below (the "International Managers" and, together with the U.S.
Underwriters, the "Underwriters"), for whom DLJ, Smith Barney Inc. and Bankers
Trust International PLC are acting as representatives (the "International
Representatives" and, together with the U.S. Representatives, the
"Representatives"), have severally agreed to purchase from the Company an
aggregate of 6,600,000 shares of Common Stock. The number of shares of Common
Stock that each Underwriter has agreed to purchase is set forth opposite its
name below:
 
<TABLE>
<CAPTION>
                                                                               NUMBER OF
                               U.S. UNDERWRITERS                              U.S. SHARES
    <S>                                                                      <C>
    Donaldson, Lufkin & Jenrette Securities Corporation....................    1,512,000
    Smith Barney Inc. .....................................................    1,512,000
    BT Securities Corporation .............................................      336,000
    Dean Witter Reynolds Inc. .............................................       80,000
    Dillon, Read & Co. Inc. ...............................................       80,000
    A.G. Edwards & Sons, Inc. .............................................       80,000
    Merrill Lynch, Pierce, Fenner & Smith Incorporated ....................       80,000
    Montgomery Securities .................................................       80,000
    Morgan Stanley & Co. Incorporated .....................................       80,000
    Oppenheimer & Co., Inc. ...............................................       80,000
    PaineWebber Incorporated ..............................................       80,000
    Wheat First Butcher Singer ............................................       80,000
    Advest, Inc. ..........................................................       40,000
    Arnhold and S. Bleichroeder, Inc. .....................................       40,000
    William Blair & Company ...............................................       40,000
    Cleary Gull Reiland & McDevitt Inc. ...................................       40,000
    Cowen & Company .......................................................       40,000
    Crowell, Weedon & Co. .................................................       40,000
    Fahnestock & Co. Inc. .................................................       40,000
    First of Michigan Corporation .........................................       40,000
    Furman Selz Incorporated ..............................................       40,000
    J.J.B. Hilliard, W.T. Lyons, Inc. .....................................       40,000
    Interstate/Johnson Lane Corporation ...................................       40,000
    Janney Montgomery Scott Inc. ..........................................       40,000
    Johnston, Lemon & Co. Incorporated ....................................       40,000
    Ladenburg, Thalmann & Co. Inc. ........................................       40,000
    C.J. Lawrence/Deutsche Bank Securities Corporation ....................       40,000
    McDonald & Company Securities, Inc. ...................................       40,000
    The Ohio Company ......................................................       40,000
    Parker/Hunter Incorporated ............................................       40,000
    Pennsylvania Merchant Group Ltd. ......................................       40,000
    Ragen MacKenzie Incorporated ..........................................       40,000
    Raymond James & Associates, Inc. ......................................       40,000
    The Robinson-Humphrey Company, Inc. ...................................       40,000
    Roney & Co. ...........................................................       40,000
    Scott & Stringfellow, Inc. ............................................       40,000
    Stephens Inc. .........................................................       40,000
    Sutro & Co. Incorporated ..............................................       40,000
    Tucker Anthony Incorporated ...........................................       40,000
    Dabney/Resnick, Inc. ..................................................       20,000
    Ferris, Baker Watts, Incorporated .....................................       20,000
    Freimark Blair & Company Inc. .........................................       20,000
    C.L. King & Associates, Inc. ..........................................       20,000
    Monness Crespi Hardt & Co. Inc. .......................................       20,000
    Pryor, McClendon, Counts & Co., Inc. ..................................       20,000
                                                                             -------------
         U.S. Offering Subtotal ...........................................    5,280,000
                                                                             -------------
</TABLE>
 
                                       51
<PAGE>   52
 
<TABLE>
<CAPTION>
                                                                               NUMBER OF
                                                                             INTERNATIONAL
                                   INTERNATIONAL UNDERWRITERS                   SHARES
    <S>                                                                      <C>
    Donaldson, Lufkin & Jenrette Securities Corporation ...................      436,500
    Smith Barney Inc. .....................................................      436,500
    Bankers Trust International PLC .......................................       97,000
    Cazenove & Co. ........................................................       50,000
    Credit Lyonnais Securities ............................................       50,000
    Deutsche Bank Aktiengesellschaft ......................................       50,000
    Internationale Nederlanden Bank N.V. ..................................       50,000
    Kleinwort Benson Limited ..............................................       50,000
    Paribas Capital Markets ...............................................       50,000
    Societe Generale ......................................................       50,000
                                                                             -------------
         International Offering Subtotal ..................................    1,320,000
                                                                             -------------
              Total .......................................................    6,600,000
                                                                             ===========
</TABLE>
 
     The Underwriting Agreement provides that the obligations of the several
Underwriters to purchase shares of Common Stock are subject to approval of
certain legal matters by counsel and to certain other conditions precedent. If
any of the shares of Common Stock are purchased by the Underwriters pursuant to
the Underwriting Agreement, all such shares of Common Stock (other than shares
of Common Stock covered by the over-allotment option described below) must be so
purchased.
 
     Prior to the Offering, there has been no established public trading market
for the Common Stock. The initial price to the public for the Common Stock
offered hereby has been determined by negotiation among the Company and the
Representatives. Among the factors considered in such negotiations were the
history of and the prospects for the industry in which the Company competes, the
ability of the Company's management, the past and present operations of the
Company, the historical results of operations of the Company, the prospects for
future earnings of the Company, the general condition of the securities markets
at the time of the Offering, and the recent market prices of securities of
generally comparable companies. There can be no assurance that an active trading
market will develop for the Common Stock or that the Common Stock will trade in
the public market subsequent to the Offering at or above the initial offering
price.
 
     The Company has agreed to indemnify the Underwriters against certain
liabilities, including liabilities under the Securities Act, or to contribute to
payments that the Underwriters may be required to make in respect thereof.
 
     The Company has been advised by the Representatives that the Underwriters
propose to offer the Common Stock to the public initially at the price to the
public set forth on the cover page of this Prospectus and to certain dealers
(who may include the Underwriters) at such price less a concession not to exceed
$.80 per share. The Underwriters may allow, and such dealers may reallow,
discounts not in excess of $.10 per share to any Underwriter and certain other
dealers.
 
     The Company has granted to the U.S. Underwriters an option to purchase up
to an aggregate of 990,000 additional shares of Common Stock at the initial
public offering price less underwriting discounts and commissions solely to
cover over-allotments. Such option may be exercised at any time until 30 days
after the date of this Prospectus. To the extent that the U.S. Underwriters
exercise such option, each of the U.S. Underwriters will be committed, subject
to certain conditions, to purchase a number of option shares proportionate to
such Underwriter's initial commitment as indicated in the preceding table.
 
     The Representatives do not intend to confirm sales of Common Stock in
excess of 5% of the number of shares of Common Stock offered in the Offering to
any accounts over which they exercise discretionary authority.
 
     VPI and directors and members of AmeriSource's management holding, in the
aggregate, approximately 12.8 million shares of Common Stock have agreed not to
file, or cause the Company to file, a registration statement with respect to,
enter into any agreement providing for or effect any public sale, public
distribution or other public disposition of shares of capital stock of the
Company, including any sale pursuant to Rule 144 or Rule 144A promulgated under
the Securities Act, for a period of 180 days following the closing date of the
Offering without the prior written consent of DLJ. See "Shares Eligible for
Future Sale."
 
                                       52
<PAGE>   53
 
     Pursuant to the Agreement Between U.S. Underwriters and International
Managers, each U.S. Underwriter has agreed that, as part of the distribution of
the shares of Common Stock, (i) it is not purchasing any shares of Common Stock
for the account of anyone other than a United States or Canadian Person (as
defined below) and (ii) it has not offered or sold, and will not offer or sell,
directly or indirectly, any shares of Common Stock or distribute this Prospectus
outside the United States or Canada or to anyone other than a United States or
Canadian Person. Pursuant to such agreement, each International Underwriter has
agreed that, as part of the distribution of shares of Common Stock (i) it is not
purchasing any shares of Common Stock for the account of any United States or
Canadian Person and (ii) it has not offered or sold, and will not offer or sell,
directly or indirectly, any shares of Common Stock or distribute this Prospectus
in the United States or Canada or to any United States or Canadian Person. The
foregoing limitations do not apply to stabilization transactions, to certain
other transactions between the U.S. Underwriters and the International Managers
specified in the Agreement Between U.S. Underwriters and International Managers
or to purchases, offers or sales by a U.S. Underwriter who is also acting as an
International Underwriter or by an International Underwriter who is also acting
as a U.S. Underwriter. As used herein, "United States" means the United States
of America, its territories, its possessions and all areas subject to its
jurisdiction, and "United States or Canadian Person" means any individual who is
a resident in the United States or Canada, or any corporation, pension, profit
sharing or other trust or entity organized under or governed by the laws of the
United States or Canada or of any political subdivision thereof (other than the
foreign branch of any United States or Canadian Person), and includes any United
States or Canadian branch of a person other than a United States or Canadian
Person.
 
     Pursuant to the Agreement Between U.S. Underwriters and International
Managers, sales may be made among the U.S. Underwriters and the International
Managers of such number of shares of Common Stock to be purchased pursuant to
the Underwriting Agreement as may be mutually agreed. Unless otherwise agreed,
the price of any shares so sold shall be the Price to the Public set forth on
the cover page hereof, less any amount not greater than the per share amount of
the concession to dealers set forth above, and the currency of settlement shall
be U.S. Dollars.
 
     Pursuant to the Agreement Between U.S. Underwriters and International
Managers, each U.S. Underwriter has represented that it has not offered or sold,
and has agreed not to offer or sell, any shares of Common Stock directly or
indirectly in contravention of the securities laws of Canada or any province or
territory thereof and has represented that any offer of shares of Common Stock
in Canada will be made only pursuant to an exemption from the requirement to
file a prospectus in the province or territory of Canada in which such offer is
made. Similarly, each International Underwriter has represented and agreed that
(i) it has not offered or sold and will not offer or sell any shares of Common
Stock in the United Kingdom by means of any document (other than in
circumstances which do not constitute an offer to the public within the meaning
of the Companies Act of 1985 of Great Britain), (ii) it has complied with and
will comply with all applicable provisions of the Financial Services Act of 1986
with respect to anything done by it in relation to the shares of Common Stock
in, from or otherwise involving the United Kingdom, and (iii) it has only issued
or passed on and will only issue or pass on to any person in the United Kingdom
any document received by it in connection with the proposed offer or sale of the
shares of Common Stock, other than any document which consists of or forms part
of listing particulars, supplementary listing particulars or any other document
required or permitted to be published by listing rules under Part IV of the
Financial Services Act 1986, if that person is of a kind described in Article
9(3) of the Financial Services Act 1986 (Investment Advertisements)(Exemptions)
Order 1988, or to any person to whom the document may otherwise lawfully be
issued or passed on.
 
     BT Securities Corporation is a wholly-owned subsidiary of Bankers Trust
Corporation and an affiliate of Bankers Trust Company ("BTCo"). BTCo is one of
the agents and a lender under the Credit Agreement, for which it receives
customary compensation. A portion of the proceeds of the Offering will be
applied to repay revolving borrowings under the Credit Agreement. See "Use of
Proceeds" and "Description of Indebtedness and Securitization Program -- The
Credit Agreement." BTCo, as a lender under the Credit Agreement, will receive
its pro rata portion of such repayment. Concurrently with the execution of the
amendment to the Credit Agreement, BTCo was the purchaser of the Certificates
issued under the Receivables Program. BT Securities Corporation acted as advisor
to the Company in structuring the Certificates, for which it received
 
                                       53
<PAGE>   54
 
customary compensation. BT Securities Corporation, Bankers Trust International
PLC and DLJ are also acting as managers of an offering of new Certificates to be
issued under the Receivables Program in the institutional and Euromarkets, the
net proceeds of which would be used to retire certain of the existing
Certificates. Such new Certificates will not be registered under the Securities
Act and may not be offered or sold in the United States absent registration or
an applicable exemption from registration requirements. In addition, DLJ and BT
Securities Corporation and its affiliates have provided investment banking and
other advisory services to the Company and its affiliates and may continue to
provide such services to the Company and its affiliates in the future.
 
     The Underwriters have reserved for sale at the initial public offering
price, less Underwriters' discount, up to 50,000 shares to employees and
directors of the Company as such persons have expressed an interest in
purchasing such shares of Common Stock in the Offering. The number of shares
available for sale to the general public will be reduced to the extent such
persons purchase such reserved shares. Any reserved shares not so purchased will
be offered by the Underwriters to the general public on the same basis as the
other shares offered hereby.
 
     Certain members of AmeriSource's management intend to obtain margin loans
from DLJ and Smith Barney Inc., primarily to satisfy certain withholding tax
liability. In connection with such margin loans, such management will pledge the
shares of Common Stock acquired pursuant to exercise of such options as
collateral for the margin loans. Under certain circumstances, DLJ and Smith
Barney Inc. may foreclose on and sell such pledged Common Stock.
 
                                 LEGAL MATTERS
 
     The validity of the shares of Common Stock offered hereby will be passed
upon for the Company by Dechert Price & Rhoads, Philadelphia, Pennsylvania.
Certain legal matters with respect to the shares of Common Stock offered hereby
will be passed upon for the Underwriters by Cahill Gordon & Reindel (a
partnership including a professional corporation), New York, New York. Barton J.
Winokur, a partner of Dechert Price & Rhoads, which performs various legal
services for the Company, is a director of the Company and owns 14,750 shares of
the Common Stock of the Company.
 
                                    EXPERTS
 
     The consolidated financial statements and schedules of AmeriSource
Distribution Corporation and AmeriSource Corporation as of September 30, 1994
and 1993 and for each of the three years in the period ended September 30, 1994
appearing and/or incorporated by reference in this Prospectus and Registration
Statement have been audited by Ernst & Young LLP, independent auditors, as set
forth in their reports thereon appearing elsewhere and/or incorporated by
reference herein and in the Registration Statement. Such consolidated financial
statements and schedules are included and/or incorporated by reference herein in
reliance upon such reports given upon the authority of such firm as experts in
accounting and auditing.
 
                                       54
<PAGE>   55
 
                             ADDITIONAL INFORMATION
 
     The Company has filed a Registration Statement (which term shall include
any amendments thereto) on Form S-2 with the Commission under the Securities Act
covering the shares of Common Stock offered hereby. This Prospectus does not
contain all of the information set forth in the Company's Registration
Statement, certain portions of which have been omitted pursuant to the rules and
regulations of the Commission. For further information with respect to the
Company and the Common Stock, reference is made to the Registration Statement,
including the exhibits and schedules thereto. The Company is subject to the
informational requirements of the Exchange Act and in accordance therewith files
reports and other information with the Commission. Copies of such materials may
be examined without charge at, or obtained upon payment of prescribed fees from,
the Public Reference Section of the Commission at 450 Fifth Street, N.W.,
Washington D.C. 20549 and the regional offices of the Commission located at
Northwestern Atrium Center, 500 West Madison Street, Suite 1400, Chicago,
Illinois 60611-2511 and 13th Floor, 7 World Trade Center, New York, New York
10048. The statements contained in this Prospectus as to the contents of any
contract or other document filed as an exhibit are of necessity brief
descriptions and are not necessarily complete. Each statement is qualified in
its entirety by reference to such contract or document.
 
                INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE
 
     The following documents previously filed with the Commission by the Company
pursuant to the Exchange Act, are incorporated by reference in this Prospectus
and made a part hereof.
 
     - The Company's Annual Report on Form 10-K for the fiscal year ended
       September 30, 1994.
 
     - The Company's Quarterly Report on Form 10-Q for the fiscal quarter ended
       December 31, 1994.
 
     Any statement contained in a document incorporated by reference herein
shall be deemed to be modified or superseded for purposes of this Prospectus to
the extent that a statement contained herein modifies, supersedes or replaces
such statement. Any statements modified or superseded shall not be deemed,
except as modified or superseded, to constitute a part of this Prospectus.
 
     The Company will provide without charge to any person to whom this
Prospectus is delivered, upon written or oral request of such person, a copy of
any or all of the documents which have been incorporated by reference in this
Prospectus, other than exhibits to such documents, unless such exhibits are
specifically incorporated by reference into the documents so incorporated.
Requests for such copies should be directed to Teresa T. Ciccotelli, Secretary,
AmeriSource Health Corporation, P.O. Box 959, Valley Forge, Pennsylvania 19482
(telephone (610) 296-4480).
 
                                       55
<PAGE>   56
 
                         INDEX TO FINANCIAL STATEMENTS
 
<TABLE>
<CAPTION>
                                                                                        PAGE
                                                                                        -----
<S>                                                                                     <C>
AMERISOURCE DISTRIBUTION CORPORATION AND SUBSIDIARIES
 
ANNUAL FINANCIAL STATEMENTS:
 
Report of Ernst & Young LLP, independent auditors.....................................    F-2
 
Consolidated Balance Sheets as of September 30, 1994 and 1993.........................    F-4
 
Consolidated Statements of Operations for the years ended September 30, 1994, 1993 and
  1992................................................................................    F-6
 
Consolidated Statements of Changes in Stockholders' Equity for the years ended
  September 30, 1994, 1993 and 1992...................................................    F-7
 
Consolidated Statements of Cash Flows for the years ended September 30, 1994, 1993 and
  1992................................................................................    F-8
 
Notes to Consolidated Financial Statements............................................    F-9
 
QUARTERLY FINANCIAL STATEMENTS (UNAUDITED):
 
Consolidated Balance Sheets as of December 31, 1994 and September 30, 1994............   F-24
 
Consolidated Statements of Operations for the three months ended
  December 31, 1994 and 1993..........................................................   F-26
 
Consolidated Statements of Cash Flows for the three months ended
  December 31, 1994 and 1993..........................................................   F-27
 
Notes to Consolidated Financial Statements............................................   F-28
</TABLE>
 
                                       F-1
<PAGE>   57
 
               REPORT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS
 
To the Board of Directors and Stockholders of
AmeriSource Distribution Corporation
 
     We have audited the accompanying consolidated balance sheets of AmeriSource
Distribution Corporation (formerly Alco Health Distribution Corporation) and
subsidiaries as of September 30, 1994 and 1993 and the related consolidated
statements of operations, changes in stockholders' equity, and cash flows for
each of the three years in the period ended September 30, 1994. These financial
statements are the responsibility of the Company's management. Our
responsibility is to express an opinion on these financial statements based on
our audits.
 
     We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.
 
     In our opinion, the consolidated financial statements referred to above
present fairly, in all material respects, the consolidated financial position of
AmeriSource Distribution Corporation and subsidiaries at September 30, 1994 and
1993, and the consolidated results of their operations and their cash flows for
each of the three years in the period ended September 30, 1994, in conformity
with generally accepted accounting principles.
 
     As discussed in the notes to the consolidated financial statements (Notes 3
and 6), in 1994 the Company changed its methods of accounting for postretirement
benefits other than pensions and income taxes.
 
                                          ERNST & YOUNG LLP
 
Philadelphia, Pennsylvania
November 2, 1994, except for Note 11,
  as to which the date is December 13, 1994
  and Note 12, as to which date is April 3, 1995
 
                                       F-2
<PAGE>   58
 
                      [This Page Intentionally Left Blank]
 
                                       F-3
<PAGE>   59
 
             AMERISOURCE DISTRIBUTION CORPORATION AND SUBSIDIARIES
 
                          CONSOLIDATED BALANCE SHEETS
                             (DOLLARS IN THOUSANDS)
 
                                     ASSETS
 
<TABLE>
<CAPTION>
                                                                          SEPTEMBER 30,      SEPTEMBER 30,
                                                                              1994               1993
                                                                          -------------      -------------
<S>                                                                       <C>                <C>
Current Assets
  Cash.................................................................     $  25,311          $  27,136
  Accounts receivable less allowance for doubtful accounts:
    1994 -- $9,370; 1993 -- $7,681.....................................       272,281            251,999
  Merchandise inventories..............................................       351,676            346,371
  Prepaid expenses.....................................................         2,442              1,977
                                                                          -------------      -------------
    Total current assets...............................................       651,710            627,483
 
Property and Equipment, at cost........................................        67,598             57,282
  Less accumulated depreciation........................................        26,416             21,176
                                                                          -------------      -------------
                                                                               41,182             36,106
Other Assets
  Excess of cost over net assets acquired..............................                          183,810
  Deferred financing costs and other, less accumulated amortization:
    1994 -- $7,239; 1993 -- $3,781.....................................        18,752             20,545
                                                                          -------------      -------------
                                                                               18,752            204,355
                                                                          -------------      -------------
                                                                            $ 711,644          $ 867,944
                                                                          ============       ============
</TABLE>
 
                See notes to consolidated financial statements.
 
                                       F-4
<PAGE>   60
 
             AMERISOURCE DISTRIBUTION CORPORATION AND SUBSIDIARIES
 
                          CONSOLIDATED BALANCE SHEETS
                             (DOLLARS IN THOUSANDS)
 
                      LIABILITIES AND STOCKHOLDERS' EQUITY
 
<TABLE>
<CAPTION>
                                                                          SEPTEMBER 30,      SEPTEMBER 30,
                                                                              1994               1993
                                                                          -------------      -------------
<S>                                                                       <C>                <C>
Current Liabilities
  Current portion of other debt........................................     $     133          $     122
  Accounts payable.....................................................       449,991            379,826
  Accrued expenses.....................................................        27,485             29,771
  Accrued income taxes.................................................        11,488                604
  Deferred income taxes................................................        29,258
                                                                          -------------      -------------
    Total current liabilities..........................................       518,355            410,323
Long-Term Debt
  Revolving credit facility............................................       175,897            248,000
  Senior subordinated notes............................................       166,134            170,562
  Other debt...........................................................         1,293              1,311
  Convertible subordinated debentures..................................           238                238
  Senior debentures....................................................       144,013            129,109
                                                                          -------------      -------------
                                                                              487,575            549,220
Other Liabilities
  Deferred compensation................................................           522                701
  Other................................................................         5,918                740
                                                                          -------------      -------------
                                                                                6,440              1,441
Stockholders' Equity
  Preferred stock, $.01 par value: 5,000,000 shares authorized; none
    issued
  Common stock, $.01 par value:
    Class A (Voting and convertible): 30,000,000 shares authorized;
      532,143 shares issued............................................             5                  5
    Class B (Non-voting and convertible): 30,000,000 shares authorized;
      12,980,885 shares issued.........................................           130                130
    Class C (Non-voting and convertible): 2,000,000 shares authorized;
      1,475,000 shares issued..........................................            15                 15
  Capital in excess of par value.......................................         4,676              4,676
  Retained earnings (deficit)..........................................      (304,984)           (97,313)
  Cost of common stock in treasury.....................................          (568)              (553)
                                                                          -------------      -------------
                                                                             (300,726)           (93,040)
                                                                          -------------      -------------
                                                                            $ 711,644          $ 867,944
                                                                          ============       ============
</TABLE>
 
                See notes to consolidated financial statements.
 
                                       F-5
<PAGE>   61
 
             AMERISOURCE DISTRIBUTION CORPORATION AND SUBSIDIARIES
 
                     CONSOLIDATED STATEMENTS OF OPERATIONS
                 (DOLLARS IN THOUSANDS, EXCEPT PER SHARE DATA)
 
<TABLE>
<CAPTION>
                                                                FISCAL YEAR ENDED SEPTEMBER 30
                                                             ------------------------------------
                                                                1994         1993         1992
                                                             ----------   ----------   ----------
<S>                                                          <C>          <C>          <C>
Revenues...................................................  $4,301,832   $3,719,025   $3,329,909
Costs and Expenses
  Cost of goods sold.......................................   4,066,641    3,509,587    3,130,186
  Selling and administrative...............................     146,644      135,805      131,245
  Environmental remediation................................       4,075
  Depreciation.............................................       6,640        5,809        5,384
  Write-off of excess of cost over net assets acquired.....     179,824
  Interest.................................................      62,611       66,696       71,025
  Non-recurring charges....................................                    2,223        2,244
                                                             ----------   ----------   ----------
                                                              4,466,435    3,720,120    3,340,084
                                                             ----------   ----------   ----------
(Loss) Before Taxes, Extraordinary Items and Cumulative
  Effects of Accounting Changes............................    (164,603)      (1,095)     (10,175)
Taxes on Income............................................       7,814        6,379        2,649
                                                             ----------   ----------   ----------
  (Loss) Before Extraordinary Items and Cumulative Effects
     of Accounting Changes.................................    (172,417)      (7,474)     (12,824)
Extraordinary Charge -- early retirement of debt, net of
  income tax benefit.......................................        (656)     (11,890)
Extraordinary Credits:
  Settlement of litigation.................................                                 4,486
  Reduction of income tax provision from carryforward of
     prior year operating losses...........................                      746        1,862
Cumulative effect of change in accounting for
  postretirement benefits other than pensions..............      (1,199)
Cumulative effect of change in accounting for income
  taxes....................................................     (33,399)
                                                             ----------   ----------   ----------
          Net (Loss).......................................  $ (207,671)  $  (18,618)  $   (6,476)
                                                              =========    =========    =========
(Loss) per share
  (Loss) Before Extraordinary Items and Cumulative Effects
     of Accounting Changes.................................  $   (11.69)  $     (.51)  $     (.87)
  Extraordinary Items......................................        (.04)        (.75)         .43
  Cumulative effect of change in accounting for
     postretirement benefits other than pensions...........        (.08)
  Cumulative effect of change in accounting for income
     taxes.................................................       (2.27)
                                                             ----------   ----------   ----------
          Net (Loss).......................................  $   (14.08)  $    (1.26)  $     (.44)
                                                              =========    =========    =========
</TABLE>
 
                See notes to consolidated financial statements.
 
                                       F-6
<PAGE>   62
 
             AMERISOURCE DISTRIBUTION CORPORATION AND SUBSIDIARIES
 
           CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY
                             (DOLLARS IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                                CAPITAL                 COMMON
                                        COMMON STOCK           IN EXCESS   RETAINED     STOCK
                                 ---------------------------    OF PAR     EARNINGS       IN      
                                 CLASS A   CLASS B   CLASS C     VALUE     (DEFICIT)   TREASURY    TOTAL
                                 -------   -------   -------   ---------   ---------   --------  ---------
<S>                              <C>       <C>       <C>       <C>         <C>         <C>      <C>
September 30, 1991.............    $ 5      $ 130      $15      $ 4,348    $ (72,219)   $(550)   $ (68,271)
  Net (loss)...................                                               (6,476)               (6,476)
                                    --
                                           ------    -------   ---------   ---------   ------    ---------
September 30, 1992.............      5        130       15        4,348      (78,695)    (550)     (74,747)
  Net (loss)...................                                              (18,618)              (18,618)
  Repurchase of stock
     options...................                                     (18)                               (18)
  Purchase of 3,503 shares of
     Class A Common Stock......                                                            (3)          (3)
  Capital contribution.........                                     346                                346
                                    --
                                           ------    -------   ---------   ---------   ------    ---------
September 30, 1993.............      5        130       15        4,676      (97,313)    (553)     (93,040)
  Net (loss)...................                                             (207,671)             (207,671)
  Purchase of 44,250 shares of
     Class A Common Stock......                                                           (15)         (15)
                                    --
                                           ------    ------    ---------   ---------    -----    ---------
September 30, 1994.............    $ 5      $ 130      $15      $ 4,676    $(304,984)   $(568)   $(300,726)
                                 ======    ======    ======     =======    =========    =====    =========
</TABLE>
 
                See notes to consolidated financial statements.
 
                                       F-7
<PAGE>   63
 
             AMERISOURCE DISTRIBUTION CORPORATION AND SUBSIDIARIES
 
                     CONSOLIDATED STATEMENTS OF CASH FLOWS
                             (DOLLARS IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                             FISCAL YEAR ENDED SEPTEMBER 30
                                                         ---------------------------------------
                                                           1994           1993           1992
                                                         ---------     -----------     ---------
<S>                                                      <C>           <C>             <C>
OPERATING ACTIVITIES
  Net (loss)...........................................  $(207,671)    $   (18,618)    $  (6,476)
  Adjustments to reconcile net (loss) to net cash
     provided by (used in) operating activities:
     Depreciation......................................      6,640           5,809         5,384
     Amortization......................................      8,120           9,407        11,510
     Provision for losses on accounts receivable.......      4,612           3,186         3,443
     Loss on disposal of property and equipment........        185           2,267           332
     Write-off of excess of cost over net assets
       acquired........................................    179,824
     Provision for deferred income taxes...............     (5,055)
     Loss on early retirement of debt..................        679          16,658
     Gain on settlement of litigation..................                                   (4,486)
     Cumulative effects of accounting changes..........     34,598
  Changes in operating assets and liabilities:
       Accounts receivable.............................    (24,894)         (6,115)      (31,130)
       Merchandise inventories.........................     (5,305)        (10,346)      (65,048)
       Prepaid expenses................................       (465)            (33)          377
       Accounts payable, accrued expenses and income
          taxes........................................     76,847          77,102        57,080
       Payments to settle litigation...................                                   (5,250)
       Debentures issued in lieu of payment of
          interest.....................................     14,904          20,378        17,231
       Other long-term liabilities.....................      4,075
  Miscellaneous........................................     (3,083)           (520)         (974)
                                                         ---------     -----------     ---------
     NET CASH PROVIDED BY (USED IN)
       OPERATING ACTIVITIES............................     84,011          99,175       (18,007)
INVESTING ACTIVITIES
  Capital expenditures.................................     (8,483)         (7,571)       (8,297)
  Proceeds from sales of property and equipment........        457           1,500           642
                                                         ---------     -----------     ---------
     NET CASH (USED IN) INVESTING ACTIVITIES...........     (8,026)         (6,071)       (7,655)
FINANCING ACTIVITIES
  Long-term debt borrowings............................    854,661         993,864       882,000
  Long-term debt repayments............................   (931,857)     (1,060,303)     (873,197)
  Deferred financing costs.............................       (589)        (13,660)       (3,131)
  Capital contribution.................................                        346
  Repurchase of stock options..........................        (10)            (18)
  Purchases of treasury stock..........................        (15)             (3)
                                                         ---------     -----------     ---------
     NET CASH (USED IN) PROVIDED BY
       FINANCING ACTIVITIES............................    (77,810)        (79,774)        5,672
                                                         ---------     -----------     ---------
(DECREASE) INCREASE IN CASH............................     (1,825)         13,330       (19,990)
Cash at beginning of year..............................     27,136          13,806        33,796
                                                         ---------     -----------     ---------
CASH AT END OF YEAR....................................  $  25,311     $    27,136     $  13,806
                                                         =========      ==========     =========
</TABLE>
 
                See notes to consolidated financial statements.
 
                                       F-8
<PAGE>   64
 
             AMERISOURCE DISTRIBUTION CORPORATION AND SUBSIDIARIES
 
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
 
NOTE 1 -- SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
 
  Consolidation
 
     AmeriSource Distribution Corporation (formerly Alco Health Distribution
Corporation) ("Distribution") is a Delaware corporation organized by an
affiliate of 399 Venture Partners Inc. ("VPI"), and other investors, including
members of management of AmeriSource Corporation ("AmeriSource") (formerly Alco
Health Services Corporation). Distribution was formed in November 1988 to
acquire AmeriSource in a leveraged buyout transaction (the "Acquisition"). The
accompanying financial statements present the consolidated financial position,
results of operations and cash flows of Distribution and its wholly-owned
subsidiary, AmeriSource Corporation (collectively, the "Company") as of the
dates and for the periods indicated. All material intercompany accounts and
transactions have been eliminated in consolidation.
 
  Business
 
     The Company is a wholesale distributor of pharmaceuticals and related
health care products.
 
  Concentrations of Credit Risk
 
     The Company sells its merchandise inventories to a large number of
customers in the health care industry including independent drug stores, chain
drug stores, hospitals, mass merchandisers, clinics and nursing homes. The
Company's trade accounts receivable are exposed to credit risk, however, the
risk is limited due to the diversity of the customer base and the customer
base's wide geographic dispersion. The Company performs ongoing credit
evaluations of its customers' financial conditions. The Company maintains
reserves for potential bad debt losses and such bad debt losses have been
historically within the Company's expectations.
 
  Merchandise Inventories
 
     Inventories are stated at the lower of cost or market. Cost is determined
using the last-in, first-out (LIFO) method, which results in a matching of
current costs and revenues. On a supplemental basis, if the first-in, first-out
(FIFO) method of valuation had been used for determining costs, inventories
would have been approximately $88,327,000 and $83,022,000 higher than the
amounts reported at September 30, 1994 and 1993, respectively.
 
  Depreciation
 
     The cost of property and equipment is depreciated over the estimated useful
lives of the related assets by the straight-line method.
 
  Deferred Financing Costs
 
     Deferred financing fees and related expenses are being amortized over 3 to
12 years.
 
  Pension Plans
 
     Pension costs, which are primarily computed using the projected unit credit
cost method, are funded based on the minimum required contribution under the
Employee Retirement Income Security Act of 1974.
 
  Revenue Recognition
 
     The Company recognizes revenues at the point at which product is shipped.
 
                                       F-9
<PAGE>   65
 
             AMERISOURCE DISTRIBUTION CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
NOTE 1 -- SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES -- (CONTINUED)
  Earnings Per Share and Share Data
 
     Earnings per share and share data in the financial statements have been
retroactively restated to reflect the effect of the 2.95-for-1 stock split
declared in connection with the public offering by the Company of its Common
Stock discussed in Note 12. Earnings per share are based on 14,750,000 shares,
(as adjusted for the 2.95-for-1 stock split as discussed in Note 12)
representing the weighted average shares outstanding during the periods
presented including the effect of the Distribution Plan and the 1991 Option Plan
stock options (Note 6), since all of the options outstanding under these plans
will be satisfied with shares purchased or to be purchased from VPI at $.34 per
share, pursuant to a prior agreement.
 
NOTE 2 -- EXCESS OF COST OVER NET ASSETS ACQUIRED
 
     The excess of cost over net assets acquired ("goodwill") was recorded at
the time of the Acquisition in 1988. Since the Acquisition, the Company has been
unable to achieve the operating results projected at the time of the
Acquisition. The projections at the time of the Acquisition were developed based
on historical experience, industry trends and management's estimates of future
performance. These projections assumed significant growth rates in revenues,
stable gross profit margins and cash flow from operations to reduce Acquisition
indebtedness and did not anticipate long-term losses or indicate an inability to
recover the value of goodwill. Due to persistent competitive pressures and a
shift in the customer mix to larger volume, lower margin customers, gross profit
margins have declined from 7.10% in fiscal 1989 to 5.63% in fiscal 1993 and
5.47% in fiscal 1994, resulting in: operating results which are substantially
below the projections made at the time of the Acquisition; an increase in the
Company's indebtedness; and an accumulated deficit in retained earnings at June
30, 1994 before the goodwill write-off of $126.4 million.
 
     During the period since the Acquisition, the Company has been affected by
price competition for market share within the industry, health care industry
consolidation and the impact of group purchasing organizations, managed care and
health care reform on drug prices. Until fiscal 1994, the Company believed the
results since the Acquisition were not indicative of long-term market conditions
affecting pricing within the industry. In fiscal 1994, the Company determined
its poor operating results since the Acquisition and its expectations for future
operating results were being significantly affected by fundamental changes in
the market place in which the Company operates. As these factors became clear
and in conjunction with the increases in interest rates, a detailed
comprehensive evaluation of the Company's future prospects was prepared. The
evaluation determined the Company's financial losses were and continue to be
significantly affected by price sensitivity, aggressive pricing by better
capitalized competitors, consolidations in the wholesale drug distribution
industry and the impact of larger buying groups. Based on current industry
trends, interest rate trends and the health care reform environment, in the
third quarter of fiscal 1994, the Company concluded that the projected operating
results (the "Projection") would not support the future recovery of the
remaining goodwill balance.
 
     The methodology employed to assess the recoverability of the Company's
goodwill was to project results of operations forward 36 years, which
approximated the remaining amortization period of the goodwill balance at June
30, 1994. The Company then evaluated the recoverability of goodwill on the basis
of the Projection.
 
     The Projection reflects significant cumulative losses indicating that the
carrying value of goodwill is not recoverable. Unless the Company is able to
develop successful strategic, operating or financing initiatives which would
change the assumptions used in the Projection, the projected future operating
results based on these assumptions is the best estimate of the Company's
projected performance given the Company's existing high leverage and industry
trends. As a result, the Company concluded that the carrying value of goodwill
could not be recovered from expected future operations. Accordingly, the Company
wrote off its remaining goodwill balance of $179.8 million in the third quarter
of fiscal 1994. More importantly, while the Company believes the reliability of
any projection over such an extended period is highly uncertain, the Projection
also
 
                                      F-10
<PAGE>   66
 
             AMERISOURCE DISTRIBUTION CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
NOTE 2 -- EXCESS OF COST OVER NET ASSETS ACQUIRED -- (CONTINUED)
indicates that the Company's long-term viability will require modification of
its current capital structure to reduce its indebtedness and increase its equity
in the near to mid-term future. While the Projection indicates that in fiscal
1998 cash flow from operations will not be sufficient to satisfy required
interest and principal payments on its current debt obligations, the Company
believes and the Projection indicates, that cash flow generated from operations
in the near-term (fiscal years 1995 through 1997) is sufficient to service its
current debt obligations. No assurance can be given that the Company will be
successful in efforts to restructure or recapitalize in order to be able to
operate in a profitable manner for the long-term.
 
NOTE 3 -- TAXES ON INCOME
 
     The income tax provision (benefit) is as follows (in thousands):
 
<TABLE>
<CAPTION>
                                                                        FISCAL YEAR ENDED
                                                                          SEPTEMBER 30
                                                                  -----------------------------
                                                                   1994        1993       1992
                                                                  -------     ------     ------
<S>                                                               <C>         <C>        <C>
Current provision
     Federal....................................................  $12,147     $4,633     $2,574
     State and local............................................      853      1,746         75
                                                                  -------     ------     ------
                                                                   13,000      6,379      2,649
                                                                  -------     ------     ------
Deferred provision (benefit)
     Federal....................................................   (5,625)
     State and local............................................      439
                                                                  -------     ------     ------
                                                                   (5,186)        --         --
                                                                  -------     ------     ------
Provision for income taxes......................................  $ 7,814     $6,379     $2,649
                                                                  =======     ======     ======
</TABLE>
 
     A reconciliation of the statutory federal income tax rate to the effective
income tax rate is as follows:
 
<TABLE>
<CAPTION>
                                                                        FISCAL YEAR ENDED
                                                                           SEPTEMBER 30
                                                                  -----------------------------
                                                                   1994       1993        1992
                                                                  ------     -------     ------
<S>                                                               <C>        <C>         <C>
Statutory federal income tax rate...............................    35.0%       34.8%      34.0%
State and local income tax rate, net of federal tax benefit.....     (.3)     (104.1)       (.5)
Tax effect of operating loss carryover..........................     6.1                  (13.5)
Amortization of difference in book and tax bases of net assets
  acquired......................................................   (39.2)     (168.6)     (20.3)
Alternative minimum tax.........................................              (274.2)     (20.3)
Other...........................................................    (6.3)      (70.5)      (5.4)
                                                                  ------     -------     ------
Effective income tax rate.......................................    (4.7)%    (582.6)%    (26.0)%
                                                                  ======     =======     ======
</TABLE>
 
     Effective October 1, 1993, the Company adopted Statement of Financial
Accounting Standards No. 109 "Accounting for Income Taxes" (Statement 109),
which requires a change in the method of accounting for income taxes from the
deferred method to the liability method. In accordance with Statement 109, the
Company recorded an adjustment of $33.4 million for the cumulative effect of
adopting Statement 109 as of October 1, 1993. As permitted under Statement 109,
prior period financial statements have not been restated. The cumulative effect
adjustment relates principally to the provision of deferred income taxes to
reflect the tax consequences on future years of the difference between the tax
and financial reporting basis of merchandise inventories.
 
                                      F-11
<PAGE>   67
 
             AMERISOURCE DISTRIBUTION CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
NOTE 3 -- TAXES ON INCOME -- (CONTINUED)
     Deferred income taxes reflect the future tax consequences of differences
between the tax bases of assets and liabilities and their financial reporting
amounts. Significant components of the Company's deferred tax liabilities
(assets) as of September 30, 1994 are as follows (in thousands):
 
<TABLE>
<S>                                                                                 <C>
Inventory.........................................................................  $ 35,712
Fixed assets......................................................................     4,654
Other.............................................................................       351
                                                                                    --------
     Gross deferred tax liabilities...............................................    40,717
                                                                                    --------
Net operating losses and tax credit carryovers....................................   (11,554)
Allowance for doubtful accounts...................................................    (3,748)
Accrued expenses..................................................................    (3,524)
Other postretirement benefits.....................................................      (497)
Other.............................................................................    (3,173)
                                                                                    --------
     Gross deferred tax assets....................................................   (22,496)
                                                                                    --------
Valuation allowance for deferred tax assets.......................................    10,350
                                                                                    --------
     Net deferred tax liabilities.................................................  $ 28,571
                                                                                    ========
</TABLE>
 
     The valuation allowance for deferred tax assets was $17.6 million at
October 1, 1993. For the fiscal years ended September 30, 1993 and 1992, the
deferred income tax provision (benefit) resulted from timing differences in the
recognition of certain expenses for tax and financial reporting purposes. Due to
limitations on the utilization of tax losses, the Company did not recognize any
deferred income tax (benefit) in 1993 or 1992. The principal components of
deferred taxes are as follows (in thousands):
 
<TABLE>
<CAPTION>
                                                                                FISCAL YEAR
                                                                            ENDED SEPTEMBER 30
                                                                            ------------------
                                                                              1993       1992
                                                                             ------     ------
<S>                                                                          <C>        <C>
Bad debts..................................................................  $ (254)    $  360
Deferred compensation......................................................     164        (31)
Interest...................................................................               (491)
Inventory..................................................................    (725)      (492)
Insurance..................................................................     113       (207)
Fixed assets...............................................................    (970)
Other......................................................................    (138)      (149)
Amount not recognized......................................................   1,810      1,010
                                                                             ------     ------
                                                                             $   --     $   --
                                                                             ======     ======
</TABLE>
 
     An unused tax net operating loss carry-over of $6,910,000 expiring in 2008,
is available to offset future taxable income.
 
     The Company was subject to the alternative minimum tax for the fiscal years
ended September 30, 1994 and September 30, 1992. The alternative minimum tax is
imposed at a 20% rate on the Company's alternative minimum taxable income which
is determined by making statutory adjustments to the Company's regular taxable
income. Net operating loss carryforwards were used to offset up to 90% of the
Company's alternative minimum taxable income. For 1992, the effect of utilizing
the net operating loss carryforward is represented for financial reporting
purposes as an extraordinary credit. The alternative minimum tax paid is allowed
as an
 
                                      F-12
<PAGE>   68
 
             AMERISOURCE DISTRIBUTION CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
NOTE 3 -- TAXES ON INCOME -- (CONTINUED)
indefinite credit carryover against the Company's regular tax liability in the
future when the Company's regular tax liability exceeds the alternative minimum
tax liability. As of September 30, 1994, the Company has a $7,142,000
alternative minimum tax credit carryforward.
 
     Income tax payments (refunds) amounted to $3,891,000, $395,000 and
$(1,089,000) in the years ended September 30, 1994, 1993 and 1992, respectively.
 
NOTE 4 -- LONG-TERM DEBT
 
     On March 30, 1993, AmeriSource entered into a credit agreement (the "Credit
Agreement") with a syndicate of financial institutions providing senior secured
facilities of up to $425 million. The Credit Agreement provides for initial
borrowings based on commitments of $380 million, consisting of a term loan of
$20 million and a revolving credit loan of up to $360 million. The maximum
amount that may be borrowed under the Credit Agreement is limited to the extent
of a sufficient borrowing base, which is essentially 85% of eligible accounts
receivable and 60% of eligible inventory. Under the terms of the Credit
Agreement, AmeriSource has pledged substantially all its assets to secure its
borrowings under the Credit Agreement and AmeriSource's parent, Distribution,
has pledged the common stock of AmeriSource. The term loan matures, and the
commitment of the syndicate to make revolving credit loans expires, on April 1,
1996.
 
     The term loan and the revolving credit loan bear interest at a rate per
annum equal to, at AmeriSource's option, LIBOR plus 3% or the prime rate plus
1 1/2%. AmeriSource has entered into a two-year interest rate cap of 12% with
respect to $100 million in borrowings under the revolving credit loan for the
purpose of limiting AmeriSource's exposure to an increase in interest rates. In
addition, AmeriSource is required to pay a fee of  1/2% per annum on the average
unused portion of the revolving credit loan commitment plus a $200,000 annual
administration fee. The Credit Agreement, as amended, contains certain
restrictive covenants and requires AmeriSource, among other things, to maintain
minimum defined net worth levels, satisfy certain financial ratios and places
certain limitations on investments, capital expenditures, additional debts,
changes in capital structure and dividend payments.
 
     At September 30, 1994, the $20 million outstanding under the term loan and
the $156 million outstanding under the revolving credit loan bore interest at
the rate of 8.10% per annum. Initial borrowings under the Credit Agreement were
used to extinguish the obligations outstanding under AmeriSource's former
revolving credit facility, which was due to expire in December, 1993. An
extraordinary loss of $3.3 million, net of a tax benefit of $1.3 million, was
recorded during the fiscal year ended September 30, 1993 representing the
write-off of the unamortized financing fees relating to the former revolving
credit facility. In connection with the Credit Agreement, the Company incurred
approximately $7.7 million in financing fees which have been deferred and are
being amortized on a straight-line basis over the three year term of the
indebtedness.
 
     The 14 1/2% Senior Subordinated Notes (the "Notes") were sold on September
15, 1989 in a public offering and are due September 15, 1999. The Notes are
unsecured obligations and are subordinated to the Credit Agreement and certain
other indebtedness, and may be redeemed at the option of the Company at a
premium, together with accrued and unpaid interest to the redemption date, at
any time on or after September 15, 1994. If, for the twelve-month period ending
on each of August 31, 1996 and 1997, the Company's consolidated fixed charge
ratio (as defined) exceeds 1.5 to 1, the Company shall be required to redeem or
otherwise repurchase in the open market and retire 5% and 10%, respectively, of
the principal amount of the Notes. The Company shall not be required to make
such redemption or repurchase until such time, and to the extent, funds become
available under the Credit Agreement or any successor or replacement facility.
In addition, the Company is required to redeem on August 31, 1998, 50% of the
aggregate principal amount of the Notes originally issued, reduced by any prior
redemptions or repurchases. During the fiscal year ended September 30, 1993, the
Company purchased and retired $4.4 million of the Notes. Premiums on the
 
                                      F-13
<PAGE>   69
 
             AMERISOURCE DISTRIBUTION CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
NOTE 4 -- LONG-TERM DEBT -- (CONTINUED)
fiscal 1993 purchases resulted in an extraordinary loss of $549,000, net of a
tax benefit of $222,000. During the fiscal year ended September 30, 1994, the
Company purchased and retired an additional $4.4 million of Notes, resulting in
an extraordinary charge of $679,000, net of a tax benefit of $23,000, consisting
of the write-off of related unamortized financing fees and premiums paid on
redemption.
 
     During the fiscal year ended September 30, 1994, the Company completed an
exchange of $40,329,000 principal amount of 14 1/2% Senior Subordinated Notes
due 1999, Series A (the "New Notes") and $101,000 in cash for $40,329,000
principal amount of its Notes. The only material difference between the terms of
the New Notes and the terms of the Notes is that the indenture of the New Notes
does not have the minimum consolidated net worth provisions set forth in the
indenture of the Notes. The indenture of the Notes requires the Company to
maintain a consolidated net worth (as defined) of $80 million. If the Company's
consolidated net worth, as defined in the indenture of the Notes, is less than
$80 million at the end of each of any two consecutive fiscal quarters, the
Company is required to offer to purchase (the "Offer") an amount of Notes equal
to 20% of the principal amount of Notes outstanding at the time the Offer is
made. The purchase price in any Offer is equal to 100% of the principal amount
purchased plus accrued interest to the date of purchase. The Offer required
could be triggered if the Company generated losses from operations, had charges
or expenses relating to a restructuring or recapitalization, or reductions in
the book value of tangible or intangible assets, if in each case the losses or
charges are of a sufficient magnitude. As a result of the elimination of the
minimum consolidated net worth provision in the indenture of the New Notes, the
Company would not be required to make an Offer to holders of the New Notes, even
in the event of a material decrease in the Company's consolidated net worth. In
addition to the exchange noted above, the Company paid the holders of an
aggregate of $125,388,000 in principal amount of Notes cash consideration of
$520,000 in exchange for each holder's agreement not to tender any of the Notes
as a result of any required Company Offer or to exercise any rights they have or
may have with respect to the consolidated net worth provision of the indenture
of the Notes. The total cash consideration of $621,000 noted above as well as
related fees and expenses of $600,000 were recognized as interest expense during
the fiscal year ended September 30, 1994.
 
     On July 26, 1993, Distribution issued $126.5 million principal amount of
11 1/4% Senior Debentures ("Senior Debentures") due 2005 in a public offering.
Interest on the Senior Debentures will be payable semi-annually on January 15
and July 15 of each year, commencing January 15, 1994. Through and including the
semi-annual interest payment due July 15, 1998, Distribution may elect, at its
option, to issue additional Senior Debentures in satisfaction of its interest
payment obligations. The Senior Debentures are senior unsecured obligations of
Distribution and rank pari passu in right of payment with all senior borrowings
of Distribution and senior in right of payment to all subordinated indebtedness
of Distribution. As indebtedness of Distribution, the Senior Debentures are
structurally subordinated to all indebtedness and other obligations of
AmeriSource. Substantially all the net proceeds of the offering (approximately
$122 million) were applied to redeem the 18% Senior Subordinated Debentures,
18 1/2% Merger Debentures and 19 1/2% Junior Subordinated Debentures of
Distribution at a redemption price of 100% of the principal amount thereof, plus
accrued and unpaid interest thereon to the date of redemption. The indenture
relating to the Senior Debentures contains restrictions relating to, among other
things, the payment of dividends, the repurchase of stock and the making of
certain other restricted payments, the incurrence of additional indebtedness and
the issuance of preferred stock, the creation of certain liens, certain asset
sales, transactions with subsidiaries and other affiliates, dividends and other
payment restrictions affecting subsidiaries, and mergers and consolidations. The
debt refinancing resulted in an extraordinary charge of $12.8 million during the
fiscal year ended September 30, 1993 relating to the redemption of the Merger
Debentures and the write-off of deferred financing costs, net of a tax benefit
of $3.2 million. In connection with the Senior Debentures, the Company incurred
approximately $5.1 million in financing fees which have been deferred and are
being amortized on a straight-line basis over the twelve year life of the
indebtedness.
 
                                      F-14
<PAGE>   70
 
             AMERISOURCE DISTRIBUTION CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
NOTE 4 -- LONG-TERM DEBT -- (CONTINUED)
     The indentures governing the Credit Agreement, the Notes, the New Notes and
the Senior Debentures contain restrictions and covenants, as amended, which
include limitations on incurrence of additional indebtedness, prohibition of
indebtedness senior to the Notes and New Notes and junior to the Credit
Agreement, restrictions on distributions and dividends to stockholders,
including Distribution, transactions with affiliates and certain corporate acts
such as mergers, consolidations and the sale of substantially all assets.
Additional covenants require compliance with financial tests, including current
ratio, leverage, interest coverage ratio, fixed charge coverage and maintenance
of minimum net worth.
 
     Interest paid on the above indebtedness during the fiscal years ended
September 30, 1994, 1993 and 1992 amounted to $46.1 million, $39.7 million and
$52.2 million, respectively.
 
     Financing fees and expenses incurred with respect to the above indebtedness
have been capitalized and are being amortized over the terms of the related
indebtedness. Total amortization of these fees and expenses (included in
interest expense) for the fiscal years ended September 30, 1994, 1993 and 1992
was $4.0 million, $3.9 million and $4.0 million, respectively.
 
     The carrying amount of the Company's revolving credit facility approximates
fair value. The combined fair value of the Notes and New Notes is approximately
$176 million and is based on quoted market prices. The fair value of the Senior
Debentures is approximately $145 million and is based on quotes from brokers. It
was not practicable to estimate the fair value of the other debt or convertible
subordinated debentures.
 
NOTE 5 -- COMMON STOCK
 
     The holders of the Class A common stock are entitled to one vote per share
on all matters to be voted upon by the stockholders of Distribution. Except as
otherwise required by law, holders of the Class B common stock and Class C
common stock generally do not possess the right to vote on any matters to be
voted upon by the stockholders of Distribution.
 
     The holders of the Class A common stock may elect at any time to convert
any or all such shares into the Class B common stock on a share-for-share basis.
Holders of the Class B common stock may elect at any time to convert any or all
of such shares into the Class A common stock, on a share-for-share basis, to the
extent the holder thereof is not prohibited from owning additional voting
securities by virtue of regulatory restrictions.
 
     The Class C common stock is subject to substantial restrictions on transfer
and has certain registration and "take-along" rights. A share of Class C common
stock will automatically be converted into a share of Class A common stock (a)
immediately prior to its sale in a subsequent public offering or (b) at such
time as such share of Class C common stock has been sold publicly after a
subsequent public offering in a transaction that complies with any maximum
quantity limitations applicable to such sale. Once a share of Class C common
stock has been converted into Class A common stock it will no longer be subject
to any restrictions on transfer nor will it be entitled to the benefits of
registration and take-along rights.
 
     During fiscal 1992, the Company increased the number of shares of Class A
common stock and Class B common stock authorized to be issued from 10,000,000
each to 30,000,000 each and increased the number of shares of Class C common
stock authorized to be issued from 500,000 to 2,000,000. During fiscal 1993,
3,503 shares of Class A common stock were purchased as treasury stock. During
fiscal 1994, 44,250 shares of Class A common stock were purchased as treasury
stock.
 
NOTE 6 -- PENSION AND OTHER BENEFIT PLANS
 
     AmeriSource provides a benefit for the majority of its employees under
noncontributory defined benefit pension plans. For each employee, the benefits
are based on years of service and average compensation.
 
                                      F-15
<PAGE>   71
 
             AMERISOURCE DISTRIBUTION CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
NOTE 6 -- PENSION AND OTHER BENEFIT PLANS -- (CONTINUED)
     A summary of the components of net periodic pension cost charged to expense
for the company-sponsored defined benefit pension plans together with
contributions charged to expense for a multi-employer union administered defined
benefit pension plan the Company participates in follows (in thousands):
 
<TABLE>
<CAPTION>
                                                                         FISCAL YEAR ENDED
                                                                            SEPTEMBER 30
                                                                    ---------------------------
                                                                     1994      1993      1992
                                                                    -------   -------   -------
<S>                                                                 <C>       <C>       <C>
Service cost......................................................  $ 2,198   $ 1,912   $ 1,669
Interest cost on projected benefit obligation.....................    2,165     2,034     1,879
Actual return on plan assets......................................      (13)   (2,842)   (3,090)
Net amortization and deferral.....................................   (2,038)      979     1,490
                                                                    -------   -------   -------
Net pension cost of defined benefit plans.........................    2,312     2,083     1,948
Net pension cost of multi-employer plan...........................      142       110        91
                                                                    -------   -------   -------
Total pension expense.............................................  $ 2,454   $ 2,193   $ 2,039
                                                                    =======   =======   =======
</TABLE>
 
     The following table sets forth (in thousands) the funded status and amount
recognized in the consolidated balance sheets for the company-sponsored defined
benefit pension plans:
 
<TABLE>
<CAPTION>
                                                            1994                        1993
                                                  -------------------------   -------------------------
                                                    ASSETS      ACCUMULATED     ASSETS      ACCUMULATED
                                                    EXCEED       BENEFITS       EXCEED       BENEFITS
                                                  ACCUMULATED     EXCEED      ACCUMULATED     EXCEED
                                                   BENEFITS       ASSETS       BENEFITS       ASSETS
                                                  -----------   -----------   -----------   -----------
<S>                                               <C>           <C>           <C>           <C>
Plan assets at fair value.......................    $24,457       $   333       $24,155        $ 280
Actuarial present value of benefit obligations:
     Vested.....................................     22,420         1,168        20,898          603
     Accumulated, not vested....................        421           210           576          171
                                                  -----------   -----------   -----------   -----------
Accumulated benefit obligations.................     22,841         1,378        21,474          774
     Effect of future pay increases.............      8,559            17         7,987          113
                                                  -----------   -----------   -----------   -----------
Projected benefit obligation....................     31,400         1,395        29,461          887
                                                  -----------   -----------   -----------   -----------
Plan assets (less than) projected benefit
  obligation....................................     (6,943)       (1,062)       (5,306)        (607)
Unrecognized net transition asset...............       (996)                     (1,167)
Unrecognized prior service cost.................      3,380           733         3,680          357
Adjustment to recognize minimum liability.......                     (813)                      (372)
Unrecognized net loss related to assumptions....      4,013           149         2,117          128
                                                  -----------   -----------   -----------   -----------
Pension (liability) recognized in balance
  sheet.........................................    $  (546)      $  (993)      $  (676)       $(494)
                                                  =========     =========     =========     =========
</TABLE>
 
     Assumptions used in computing the funded status of the plans were as
follows:
 
<TABLE>
<CAPTION>
                                                                1994       1993      1992
                                                               ------     ------     -----
    <S>                                                        <C>        <C>        <C>
    Discount rate............................................   7.75%      7.25%      8.0%
    Rate of increase in compensation levels..................   6.25%      5.75%      6.5%
    Expected long-term rate of return on assets..............  10.00%     10.00%     10.0%
</TABLE>
 
     Plan assets at September 30, 1994 are invested principally in listed
stocks, corporate and government bonds and cash equivalents.
 
                                      F-16
<PAGE>   72
 
             AMERISOURCE DISTRIBUTION CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
NOTE 6 -- PENSION AND OTHER BENEFIT PLANS -- (CONTINUED)
     Additionally, the Company sponsors the Employee Investment Plan, a defined
contribution 401(k) plan, which covers salaried and certain hourly employees.
Eligible participants may contribute to the plan up to 2% to 6% of their regular
compensation before taxes. The Company matches the employee contributions in an
amount equal to 50% of the participants' contributions. An additional
discretionary Company contribution in an amount not to exceed 50% of the
participants' contributions may also be made depending upon the Company's
performance. All contributions are invested at the direction of the employee in
one or more funds. Employer contributions vest over a five-year period depending
upon an employee's years of service. Costs of the plan charged to expense for
the fiscal years ended September 30, 1994, 1993 and 1992 amounted to $1,093,000,
$792,000 and $926,000, respectively.
 
     Distribution adopted the AmeriSource Distribution Corporation and
Subsidiaries Employee Stock Purchase Plan (the "Distribution Plan") to enable
key members of management of AmeriSource to participate in the equity ownership
of Distribution. The securities subject to the Distribution Plan are
Distribution's Class A common stock. The purchase price for shares of
Distribution was $.34 per share. Eligible management participants with prior
AmeriSource options were required to defer the purchase of some or all of the
Distribution Class A common stock allocated to them. Pursuant to the
Distribution Plan, management investors, on November 3, 1989, purchased options
on 1,716,347 shares of Distribution's Class A common stock which became
exercisable in 20% annual increments commencing on January 1, 1990 and expire
five years after the date of grant, or if Distribution has not gone public or
been sold within that five-year period, at the earlier of (i) 10 years from the
date of grant, (ii) the date Distribution is sold or (iii) 90 days after the
date Distribution goes public. During fiscal 1991 and 1993, respectively, 62,872
and 121,872 options purchased by management investors in fiscal 1990 were
extinguished. No options were exercised during fiscal 1994 or 1993 and no
additional options will be issued under the Distribution Plan. As of September
30, 1994, there were 1,531,603 options outstanding under the Distribution Plan,
all of which were exercisable.
 
     Distribution adopted the AmeriSource Distribution Corporation Partners
Stock Option Plan (the "Partners Plan") to enable other employees of AmeriSource
to participate in the equity ownership of Distribution. On March 2, 1991,
options to acquire 368,160 shares of Distribution Class A common stock were
granted at an exercise price of $.34 per share. The options under the Partners
Plan became exercisable when they vested on September 30, 1994 and expire on
December 31, 1994. If an option terminates or expires without having been
exercised, no new options may be granted covering the shares subject to such
option, and such shares shall cease to be reserved for future issuance under the
Partners Plan. No additional options will be granted under the Partners Plan.
During fiscal 1991, 9,440 options were canceled and during fiscal 1992 an
additional 18,880 options were canceled, leaving 339,840 options outstanding
under the Partners Plan as of September 30, 1994.
 
     Distribution adopted the AmeriSource Distribution Corporation 1991 Stock
Option Plan (the "1991 Option Plan") for the granting of non-qualified stock
options to acquire up to an aggregate of 1,069,375 shares of Distribution Class
A common stock. The options granted to certain members of the Company's
management under the 1991 Stock Option Plan represented the shares unallocated
under the Distribution Plan and options never granted under a performance stock
option plan originally announced by Distribution in 1989 and reflect achievement
in the Company's operating performance through fiscal year ended September 30,
1991. The options granted under the 1991 Option Plan are not subject to
forfeiture, exercisable at the rate of 50% per year on each of January 1, 1993
and January 1, 1994 and expire on November 3, 1994, or if prior to November 3,
1994, Distribution has not gone public or been sold, then at the earlier of (i)
November 3, 1999, (ii) the date Distribution is sold or (iii) 90 days after the
date Distribution goes public. During fiscal 1994, 29,500 options were
extinguished, leaving 1,039,875 options outstanding at an exercise price of $.34
per share under the 1991 Option Plan as of September 30, 1994.
 
                                      F-17
<PAGE>   73
 
             AMERISOURCE DISTRIBUTION CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
NOTE 6 -- PENSION AND OTHER BENEFIT PLANS -- (CONTINUED)
     The Company's 1992 Stock Option Plan (the "1992 Option Plan"), which was
adopted by the Board of Directors on March 31, 1992 and approved by the
stockholders on April 7, 1992, provides for the granting over time of
non-qualified stock options to acquire up to approximately 5 million shares of
Distribution Class A common stock to employees of the Company. Such options will
be granted based upon performance and with vesting schedules to be determined at
the time of grant. Under the 1992 Option Plan, the exercise price of options
will not be less than the fair market value of the Class A common stock on the
date of the grant. Options granted to employees will not be exercisable after
the expiration of six years from the date of the grant or such sooner date as
determined. No options have been granted under the 1992 Option Plan.
 
     As a result of special termination benefit packages previously offered, the
Company provides medical, dental and life insurance benefits to certain retirees
and their dependents. These benefit plans are unfunded. Prior to October 1,
1993, the Company recognized the expenses for these plans on the cash basis.
Effective October 1, 1993, the Company adopted Statement of Financial Accounting
Standards No. 106 "Employers' Accounting for Postretirement Benefits Other Than
Pensions" (Statement 106), which requires that the cost of postretirement health
care benefits be recognized on the accrual basis as employees render service to
earn the benefit instead of on the cash basis when the benefits are paid. As of
October 1, 1993, the Company adopted Statement 106 by recognizing the
accumulated obligation related to these benefits. The cumulative effect of this
change in accounting principle resulted in a non-cash charge to net income of
$1.2 million. In addition to the cumulative effect adjustment, the expense for
postretirement benefits other than pensions for the fiscal year ended September
30, 1994, was $80,000, approximately equal to the cash payments. The cash
payments for such benefits in fiscal years 1993 and 1992, respectively, were
approximately the same as fiscal 1994. Since the plans are unfunded and relate
only to certain retirees, the fiscal 1994 expense accrual for these benefits
consisted solely of an interest cost component. The accumulated postretirement
benefit obligation was $1.1 million as of September 30, 1994. The weighted
average discount rate used in determining the accumulated postretirement benefit
obligation was 7.25% and 7.75% at October 1, 1993 and September 30, 1994,
respectively. A health care cost trend rate of 11.4% was assumed for fiscal
1995, gradually declining to an ultimate level of 5.5% over 15 years. Increasing
the assumed health care cost trend rates by 1% in each year and holding all
other assumptions constant, would increase the accumulated postretirement
benefit obligation as of September 30, 1994 by $77,500 and increase the
postretirement benefit cost in fiscal 1994 by $7,000.
 
NOTE 7 -- LEASES
 
     The costs of capital leases are included in property and equipment and the
obligations therefor in other debt. Related amortization is included in
depreciation. At September 30, 1994, future minimum payments totaling
$21,346,000 under noncancelable operating leases with remaining terms of more
than one year were due as follows: 1995 -- $6,214,000; 1996 -- $5,197,000;
1997 -- $3,390,000; 1998 -- $1,885,000; 1999 -- $1,281,000; thereafter (through
2004) -- $3,379,000. In the normal course of business, operating leases are
generally renewed or replaced by other leases.
 
     Total rental expense was $6,168,000 in 1994, $6,034,000 in 1993 and
$5,647,000 in 1992.
 
NOTE 8 -- LEGAL MATTERS AND CONTINGENCIES
 
     In the ordinary course of its business, the Company becomes involved in
lawsuits, administrative proceedings and governmental investigations, including
antitrust, environmental, product liability and regulatory agency matters. In
some of these proceedings, plaintiffs may seek to recover large and sometimes
unspecified amounts and the matters may remain unresolved for several years. The
Company does not believe that these matters, individually or in the aggregate,
will have a material adverse effect on its business or financial condition.
 
                                      F-18
<PAGE>   74
 
             AMERISOURCE DISTRIBUTION CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
NOTE 8 -- LEGAL MATTERS AND CONTINGENCIES -- (CONTINUED)
     In November 1993, the Company was named a defendant, along with six other
wholesale distributors and twenty-four pharmaceutical manufacturers, in fourteen
civil actions filed by independent retail pharmacies in the United States
District Court for the Southern District of New York. Plaintiffs seek to
establish these lawsuits and over thirty-four others (to which the Company is
not a party) filed by other pharmacies as class actions. In essence, these
lawsuits all claim that the manufacturer and wholesaler defendants have
combined, contracted and conspired to fix the prices charged to plaintiffs and
class members for prescription brand name pharmaceuticals. Specifically,
plaintiffs claim that the defendants use "chargeback agreements" to give some
institutional pharmacies discounts that are not made available to retail drug
stores. Plaintiffs seek injunctive relief, treble damages, attorneys' fees and
costs. These actions have been transferred to the United States District Court
for the Northern District of Illinois for consolidated and coordinated pretrial
proceedings. Effective October 26, 1994, the Company entered into a Judgment
Sharing Agreement with other wholesaler and pharmaceutical manufacturer
defendants. Under the Judgment Sharing Agreement: (a) the manufacturer
defendants agreed to reimburse the wholesaler defendants for litigation costs
incurred, up to an aggregate of $9 million; and (b) if a judgment is entered
into against both manufacturers and wholesalers, the total exposure for joint
and several liability of the Company is limited to the lesser of 1% of such
judgment or one million dollars. In addition, the Company has released any
claims which it might have had against the manufacturers for the claims
presented by the plaintiffs in these lawsuits. The Judgment Sharing Agreement
covers the federal court litigation as well as the cases which have been filed
in various state courts. The Company believes it has meritorious defenses to the
claims asserted in these lawsuits and intends to vigorously defend itself in all
of these cases.
 
     The Company has become aware that its former Charleston, South Carolina
distribution center was previously owned by a fertilizer manufacturer and that
there is evidence of residual soil contamination remaining from the fertilizer
manufacturing process operated on that site over thirty years ago. The Company
engaged an environmental consulting firm to conduct a soil survey and initiated
a groundwater study during fiscal 1994. The preliminary results of the
groundwater study indicate that there is lead in the groundwater at levels
requiring further investigation and response. A preliminary engineering analysis
was prepared by outside consultants during the third quarter of fiscal 1994, and
indicated that, if both soil and groundwater remediation are required, the most
likely cost of remediation efforts at the Charleston site is estimated to be
$4.1 million. Accordingly, a liability of $4.1 million was recorded during the
third quarter of fiscal 1994 to cover future consulting, legal and remediation
and ongoing monitoring costs. The Company has notified the appropriate state
regulatory agency from whom approval must be received before proceeding with any
further tests or with the actual site remediation. The approval process and
remediation could take several years to accomplish and the actual costs may
differ from the liability which has been recorded. The accrued liability, which
is reflected in other long-term liabilities on the accompanying consolidated
balance sheet, is based on an estimate of the extent of contamination and choice
of remedy, existing technology and presently enacted laws and regulations,
however, changes in remediation standards, improvements in cleanup technology
and discovery of additional information concerning the site could affect the
estimated liability in the future. The Company is investigating the possibility
of asserting claims against responsible parties for recovery of these costs.
Whether or not any recovery may be forthcoming is unknown at this time, although
the Company intends to vigorously enforce its rights and remedies.
 
     The Company has been named as a defendant in several lawsuits based upon
alleged injuries and deaths attributable to the product L-Tryptophan. The
Company did not manufacture L-Tryptophan; however, prior to an FDA recall, the
Company did distribute products containing L-Tryptophan from several of its
vendors. The Company believes that it is entitled to full indemnification by its
suppliers and the manufacturer of L-Tryptophan with respect to these lawsuits
and any other lawsuits involving L-Tryptophan in which the Company may be named
in the future. To date, the indemnity to the Company in such suits has not been
in dispute and, although the Company believes it is unlikely it will incur any
loss as a result of such lawsuits, the
 
                                      F-19
<PAGE>   75
 
             AMERISOURCE DISTRIBUTION CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
NOTE 8 -- LEGAL MATTERS AND CONTINGENCIES -- (CONTINUED)
Company believes that its insurance coverage and supplier indemnification are
adequate to cover any losses should they occur.
 
     The Company has received Notices of Proposed Adjustment from the Internal
Revenue Service in connection with an audit of the Company's federal income tax
returns for the taxable years 1987 through 1991. The proposed adjustments
indicate a net increase to taxable income for these years of approximately $23
million and relate principally to the deductibility of costs incurred with
respect to the Acquisition. The Company has analyzed these matters with tax
counsel, believes it has meritorious defenses to the adjustments proposed by the
Internal Revenue Service and any amounts assessed will not have a material
effect on the financial statements of the Company.
 
     At September 30, 1994, there were contingent liabilities with respect to
taxes, guarantees of borrowings by certain customers, lawsuits and environmental
and other matters occurring in the ordinary course of business. On the basis of
information furnished by counsel and others, management believes that none of
these contingencies will materially affect the Company.
 
     On December 3, 1991, AmeriSource entered into a settlement agreement with
Bear Stearns & Co., Inc. ("Bear Stearns") resolving a civil action that had been
filed on August 14, 1989 and Bear Stearns' interest in an appraisal action
arising from the Acquisition. AmeriSource paid Bear Stearns $7,235,000 in 1992
and will pay $2,500,000 in November 2001, without interest and subject in
certain circumstances to earlier payment. The Delaware Chancery Court approved
the settlement of Bear Stearns' interest in the appraisal action and the
settlement of the remaining claims (representing less than 5% of the shares in
the original action) on similar terms. Payments of $600,000 were made during
fiscal 1992 in settlement of a portion of the remaining claims. These
settlements with Bear Stearns and the other dissenters resulted in an
extraordinary gain in 1992 of $4,486,000 from the extinguishment of the
associated debt.
 
NOTE 9 -- NON-RECURRING CHARGES
 
     The non-recurring charges in 1993 consisted of $1,254,000 in losses on the
disposal of three warehouses and charges of $969,000 for the write-down to net
realizable value of two additional warehouses no longer in operation which were
designated for sale. The non-recurring charges in 1992 consisted of a loss of
$287,000 incurred on the sale of a warehouse no longer in operation and the
write off of $1,957,000 in professional fees incurred in connection with a
public offering attempted during 1992 which was later abandoned due to market
conditions.
 
NOTE 10 -- RELATED PARTY TRANSACTIONS
 
     On October 21, 1991, an involuntary bankruptcy petition under Chapter 7 of
the United States Bankruptcy Code was filed against RDS Acquisition Corp.
("RDS"), which was a customer of the Company. Affiliates of VPI had substantial
equity and debt interests in RDS and related entities. VPI indemnified
AmeriSource for $5,800,000 of the amounts owed by RDS to AmeriSource on October
25, 1991, for which AmeriSource did not otherwise recover the amount owed.
 
NOTE 11 -- SUBSEQUENT EVENTS
 
     In December 1994, the Company sold substantially all of its trade accounts
and notes receivable (the "Receivables") to AmeriSource Receivables Corporation
("ARC"), a special purpose wholly-owned subsidiary, pursuant to a trade
receivables securitization program (the "Receivables Program"). As contemplated
by the Receivables Program, the Company formed and capitalized ARC through a
contribution of $40 million. Contemporaneously, the Company entered into a
Receivables Purchase Agreement with ARC, whereby ARC agreed to purchase on a
continuous basis Receivables originated by the Company. Pursuant to the
Receivables Program, ARC transfers such Receivables to a master trust in
exchange for, among other things, certain trade
 
                                      F-20
<PAGE>   76
 
             AMERISOURCE DISTRIBUTION CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
NOTE 11 -- SUBSEQUENT EVENTS -- (CONTINUED)
receivables-backed certificates (the "Certificates"). Contemporaneously,
Certificates in an aggregate principal amount of up to $230 million face amount
were sold to investors. The Company will account for the transactions
contemplated by the terms of the Receivables Purchase Agreement as a sale of
Receivables from AmeriSource to ARC and as a financing transaction by ARC on the
Company's consolidated financial statements. During the five year term of the
Receivables Program, the cash generated by collections on the Receivables will
be used to purchase, among other things, additional Receivables originated by
the Company. The Certificates bear interest at a rate selected by the Company
equal to (i) the higher of (a) the prime lending rate and (b) the federal funds
rate plus 50 basis points or (ii) LIBOR plus 50 basis points. In addition,
during the first seventy five days of the Receivables Program, the Company may
select an interest rate equal to the federal funds rate plus 125 basis points.
The interest rates for the Certificates are subject to the following step-ups:
(i) with respect to the ABR tranche (based on the higher of the prime rate or
federal funds rate plus 50 basis points), an additional 50 basis points
beginning one year after the closing date (December 13, 1994) and (ii) with
respect to the LIBOR tranche, an additional 12 1/2 basis points beginning six
months after the closing date, an additional 12 1/2 basis points beginning nine
months after the closing date, and an additional 75 basis points beginning one
year after the closing date.
 
     At the same time that it entered into the Receivables Program, the Company
and its senior lenders amended its existing Credit Agreement. Among other
things, the Amended and Restated Credit Agreement: (i) extended the term of the
Credit Agreement until January 3, 2000; (ii) established the amount the Company
may borrow at $380 million; (iii) reduced the initial borrowing rate to LIBOR
plus 225 basis points and provided for further interest rate stepdowns upon the
occurrence of certain events; (iv) modified the borrowing base availability from
inventory and receivable based to inventory based; and (v) increased the
Company's ability to make acquisitions and pay dividends.
 
     Contemporaneously with the consummation of the Receivables Program and the
execution of the Amended and Restated Credit Agreement, the Company called for
optional redemption all of the outstanding Notes and New Notes at a redemption
price of 106% of the principal amount plus accrued interest through the
redemption date of January 12, 1995.
 
NOTE 12 -- SUBSEQUENT EQUITY TRANSACTIONS
 
     On April 3, 1995, the Company filed a registration statement which became
effective with respect to a public offering by the Company of up to 7,590,000
shares of Class A common stock, including an over-allotment option of up to
990,000 shares. The net proceeds to the Company will be applied to fund the
redemption of one-half of the 11 1/4% senior debentures outstanding for 110% of
the principal amount plus accrued interest through date of redemption which will
result in an estimated extraordinary charge of $9.8 million. The balance of the
net proceeds will be used to fund internal growth and further expansion and for
working capital and other general corporate purposes. Prior to the sale of
common stock contemplated by the public offering, AmeriSource Distribution
Corporation amended its certificate of incorporation to change its corporate
name to AmeriSource Health Corporation.
 
     In conjunction with the sale of common stock, the Company authorized a
2.95-for-1 stock split. All references to earnings per share and share data in
the financial statements have been restated to give effect to the stock split.
 
     In conjunction with the public offering described above, the Company
anticipates that the company will issue 2,571,478 shares of common stock upon
the exercise of the options issued under The Distribution Plan and the 1991
Option Plan which expire 90 days after the closing of the offering. Also
pursuant to a prior agreement, the Company expects to repurchase 1,338,894
shares of common stock from VPI upon the exercise of the Distribution Plan and
the 1991 Option Plan at a price of $.34 per share. In December 1994,
 
                                      F-21
<PAGE>   77
 
             AMERISOURCE DISTRIBUTION CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
NOTE 12 -- SUBSEQUENT EQUITY TRANSACTIONS -- (CONTINUED)
336,448 options under the Partners Plan were exercised resulting in the issuance
of 336,448 shares of Class A Common Stock and the buyback of 107,085 shares of
Class A Common Stock to satisfy minimum tax withholdings.
 
     The Company adopted the 1995 Option Plan and the Directors Plan which will
provide for the granting over time of stock options to acquire shares of Class A
Common Stock. In conjunction with the Offering, the Company eliminated all
authorized shares of preferred stock, increased the authorized number of shares
of Class A Common Stock and decreased the authorized number of shares of Class B
Common Stock.
 
NOTE 13 -- OTHER INFORMATION (UNAUDITED)
 
                            QUARTERLY FINANCIAL DATA
                     (IN THOUSANDS, EXCEPT PER SHARE DATA)
 
<TABLE>
<CAPTION>
                                                                 THREE MONTHS ENDED(1)
                                                 ------------------------------------------------------
                                                 DECEMBER 31,   MARCH 31,     JUNE 30,    SEPTEMBER 30,
                                                     1993          1994         1994          1994
                                                 ------------   ----------   ----------   -------------
<S>                                              <C>            <C>          <C>          <C>
Revenues.......................................   $1,045,776    $1,067,112   $1,079,302    $ 1,109,642
Gross Profit...................................       53,999        58,480       57,455         65,257
Income (Loss) Before Extraordinary Items and
  Cumulative Effects of Accounting Changes.....        2,579         3,822     (180,057)         1,239
Extraordinary Charge -- Early Retirement of
  Debt.........................................         (656)
Cumulative Effects of Accounting Changes.......      (34,598)
Net Income (Loss)..............................      (32,675)        3,822     (180,057)         1,239
Per Share:
Income (Loss) Before Extraordinary Items and
  Cumulative Effects of Accounting Changes.....          .18           .26       (12.21)           .08
Extraordinary Items............................         (.04)
Cumulative Effects of Accounting Changes.......        (2.35)
Net Income (Loss)..............................        (2.21)          .26       (12.21)           .08
</TABLE>
 
<TABLE>
<CAPTION>
                                                                   THREE MONTHS ENDED
                                                 ------------------------------------------------------
                                                 DECEMBER 31,   MARCH 31,     JUNE 30,    SEPTEMBER 30,
                                                     1992          1993         1993          1993
                                                 ------------   ----------   ----------   -------------
<S>                                              <C>            <C>          <C>          <C>
Revenues.......................................   $  917,681    $  920,195   $  918,499    $   962,650
Gross Profit...................................       51,378        53,385       50,302         54,373
(Loss) Before Extraordinary Items..............       (2,895)       (1,308)      (2,257)        (1,014)
Extraordinary Charge -- Early Retirement of
  Debt.........................................                     (2,635)                     (9,255)
Extraordinary Credit -- Income Taxes...........          100           150           60            436
Net (Loss).....................................       (2,795)       (3,793)      (2,197)        (9,833)
Per Share:
(Loss) Before Extraordinary Items..............         (.20)         (.08)        (.16)          (.07)
Extraordinary Items............................          .01          (.17)         .01           (.60)
Net (Loss).....................................         (.19)         (.25)        (.15)          (.67)
</TABLE>
 
- ---------------
(1) December 31, 1993 amounts reflect the cumulative effect of the accounting
    changes for postretirement benefits other than pensions and income taxes.
    June 30, 1994 amounts reflect the write-off of goodwill discussed in Note 2.
 
                                      F-22
<PAGE>   78
 
                      [This Page Intentionally Left Blank]
 
                                      F-23
<PAGE>   79
 
             AMERISOURCE DISTRIBUTION CORPORATION AND SUBSIDIARIES
 
                          CONSOLIDATED BALANCE SHEETS
                             (DOLLARS IN THOUSANDS)
 
                                     ASSETS
 
<TABLE>
<CAPTION>
                                                                       
                                                                      DECEMBER 31,    SEPTEMBER 30,
                                                                         1994             1994
                                                                      ------------    -------------
                                                                      (UNAUDITED)
<S>                                                                   <C>             <C>
Current Assets
  Cash..............................................................   $  29,325        $  25,311
  Restricted cash...................................................       6,748
  Accounts receivable less allowance for doubtful accounts:
     12/94 -- $11,986; 9/94 -- $9,370...............................     302,765          272,281
  Merchandise inventories...........................................     514,480          351,676
  Prepaid expenses and other........................................       2,549            2,442
                                                                      -----------     -------------
          Total current assets......................................     855,867          651,710
Property and Equipment, at cost.....................................      68,832           67,598
  Less accumulated depreciation.....................................      27,618           26,416
                                                                      -----------     -------------
                                                                          41,214           41,182
Deferred financing costs and other, less accumulated amortization:
  12/94 -- $1,434; 9/94 -- $7,239...................................      18,646           18,752
                                                                      -----------     -------------
                                                                       $ 915,727        $ 711,644
                                                                       =========       ==========
</TABLE>
 
                See notes to consolidated financial statements.
 
                                      F-24
<PAGE>   80
 
             AMERISOURCE DISTRIBUTION CORPORATION AND SUBSIDIARIES
 
                          CONSOLIDATED BALANCE SHEETS
                             (DOLLARS IN THOUSANDS)
 
                      LIABILITIES AND STOCKHOLDERS' EQUITY
 
<TABLE>
<CAPTION>
                                                                     DECEMBER 31,     SEPTEMBER 30,
                                                                         1994             1994
                                                                     ------------     -------------
                                                                     (UNAUDITED)
<S>                                                                  <C>              <C>
Current Liabilities
  Current portion of other debt....................................   $      116        $     133
  Accounts payable.................................................      473,757          449,991
  Accrued expenses.................................................       43,932           27,485
  Accrued income taxes.............................................       10,305           11,488
  Deferred income taxes............................................       29,258           29,258
                                                                     ------------     -------------
     Total current liabilities.....................................      557,368          518,355
Long-Term Debt
  Revolving credit facility........................................      147,041          175,897
  Receivables securitization financing.............................      202,000
  Senior subordinated notes........................................      166,134          166,134
  Other debt.......................................................        1,308            1,293
  Convertible subordinated debentures..............................          238              238
  Senior debentures................................................      147,970          144,013
                                                                     ------------     -------------
                                                                         664,691          487,575
Other Liabilities
  Deferred compensation............................................          528              522
  Other............................................................        5,885            5,918
                                                                     ------------     -------------
                                                                           6,413            6,440
Stockholders' Equity
  Preferred stock, $.01 par value:
     5,000,000 shares authorized; none issued
  Common Stock, $.01 par value:
     Class A (Voting and convertible): 30,000,000 shares
      authorized;
       issued 12/94 -- 868,591 shares; 9/94 -- 532,143 shares......            8                5
     Class B (Non-voting and convertible): 30,000,000 shares
      authorized; 12,980,885 shares issued.........................          130              130
     Class C (Non-voting and convertible): 2,000,000 shares
      authorized; 1,475,000 shares issued..........................           15               15
  Capital in excess of par value...................................        4,787            4,676
  Retained earnings (deficit)......................................     (315,847)        (304,984)
  Cost of common stock in treasury.................................       (1,838)            (568)
                                                                     ------------     -------------
                                                                        (312,745)        (300,726)
                                                                     ------------     -------------
                                                                      $  915,727        $ 711,644
                                                                      ==========       ==========
</TABLE>
 
                See notes to consolidated financial statements.
 
                                      F-25
<PAGE>   81
 
             AMERISOURCE DISTRIBUTION CORPORATION AND SUBSIDIARIES
 
                     CONSOLIDATED STATEMENTS OF OPERATIONS
                 (DOLLARS IN THOUSANDS, EXCEPT PER SHARE DATA)
 
<TABLE>
<CAPTION>
                                                                         THREE MONTHS ENDED
                                                                            DECEMBER 31,
                                                                      -------------------------
                                                                         1994           1993
                                                                      ----------     ----------
                                                                             (UNAUDITED)
<S>                                                                   <C>            <C>           
Revenues............................................................  $1,157,100     $1,045,776
Costs and expenses
  Cost of goods sold................................................   1,093,863        991,777
  Selling and administrative........................................      39,598         34,410
  Depreciation......................................................       1,700          1,589
  Interest..........................................................      17,323         15,233
                                                                      ----------     ----------
                                                                       1,152,484      1,043,009
Income before taxes, extraordinary items and cumulative effects of
  accounting changes................................................       4,616          2,767
Taxes on income.....................................................       3,730            188
                                                                      ----------     ----------
Income before extraordinary items and cumulative effects of
  accounting changes................................................         886          2,579
Extraordinary charges -- early retirement of debt, net of income tax
  benefits..........................................................     (11,749)          (656)
Cumulative effect of change in accounting for postretirement
  benefits other than pensions......................................                     (1,199)
Cumulative effect of change in accounting for income taxes..........                    (33,399)
                                                                      ----------     ----------
          Net (loss)................................................  $  (10,863)    $  (32,675)
                                                                       =========      =========
Earnings (loss) per share
  Income before extraordinary items and cumulative effects of
     accounting changes.............................................  $      .06     $      .18
  Extraordinary items...............................................        (.80)          (.04)
  Cumulative effect of change in accounting for postretirement
     benefits other than pensions...................................                       (.08)
  Cumulative effect of change in accounting for income taxes........                      (2.27)
                                                                      ----------     ----------
          Net (loss)................................................  $     (.74)    $    (2.21)
                                                                       =========      =========
</TABLE>
 
                See notes to consolidated financial statements.
 
                                      F-26
<PAGE>   82
 
             AMERISOURCE DISTRIBUTION CORPORATION AND SUBSIDIARIES
 
                     CONSOLIDATED STATEMENTS OF CASH FLOWS
                             (DOLLARS IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                                          THREE MONTHS ENDED
                                                                             DECEMBER 31,
                                                                       -------------------------
                                                                          1994           1993
                                                                       -----------     ---------
                                                                               (UNAUDITED)
<S>                                                                    <C>             <C>
OPERATING ACTIVITIES
  Net (loss).........................................................   $  (10,863)    $ (32,675)
  Adjustments to reconcile net (loss) to net cash (used in) operating
     activities:
     Depreciation....................................................        1,700         1,589
     Amortization....................................................          812         2,242
     Provision for losses on accounts receivable.....................        2,737           961
     (Gain) on disposal of property and equipment....................          (26)           (8)
     Deferred income taxes...........................................         (184)         (782)
     Loss on early retirement of debt................................       15,426           679
     Cumulative effects of accounting changes........................                     34,598
     Changes in operating assets and liabilities:
       Restricted cash...............................................       (6,748)
       Accounts receivable...........................................      (33,221)      (34,080)
       Merchandise inventories.......................................     (162,804)      (51,104)
       Prepaid expenses..............................................         (107)          429
       Accounts payable, accrued expenses and income taxes...........       29,062        30,037
       Debentures issued in lieu of payment of interest..............        3,957         3,558
     Miscellaneous...................................................          307          (637)
                                                                       -----------     ---------
       NET CASH (USED IN) OPERATING ACTIVITIES.......................     (159,952)      (45,193)
INVESTING ACTIVITIES
  Capital expenditures...............................................       (3,364)       (1,946)
  Proceeds from sales of property and equipment......................        1,627            73
                                                                       -----------     ---------
       NET CASH (USED IN) INVESTING ACTIVITIES.......................       (1,737)       (1,873)
                                                                       -----------     ---------
FINANCING ACTIVITIES
  Long-term debt borrowings..........................................      593,505       244,400
  Long-term debt repayments..........................................     (420,393)     (205,893)
  Deferred financing costs...........................................       (6,253)          (55)
  Exercise of stock options..........................................          114
  Purchases of treasury stock........................................       (1,270)
                                                                       -----------     ---------
       NET CASH PROVIDED BY FINANCING ACTIVITIES.....................      165,703        38,452
                                                                       -----------     ---------
Increase (decrease) in cash..........................................        4,014        (8,614)
Cash at beginning of period..........................................       25,311        27,136
                                                                       -----------     ---------
CASH AT END OF PERIOD................................................   $   29,325     $  18,522
                                                                         =========     =========
</TABLE>
 
                See notes to consolidated financial statements.
 
                                      F-27
<PAGE>   83
 
             AMERISOURCE DISTRIBUTION CORPORATION AND SUBSIDIARIES
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)
 
NOTE 1 -- BASIS OF PRESENTATION
 
     AmeriSource Distribution Corporation ("Distribution"), is a Delaware
corporation organized by an affiliate of 399 Venture Partners, Inc. ("VPI"), and
other investors, including members of management of AmeriSource Corporation
("AmeriSource"). Distribution was formed in November, 1988 to acquire
AmeriSource in a leveraged buyout transaction (the "Acquisition"). The
accompanying financial statements present the consolidated financial position,
results of operations and cash flows of Distribution and its wholly-owned
subsidiary AmeriSource Corporation (collectively, the "Company") as of the dates
and for the periods indicated. All material intercompany accounts and
transactions have been eliminated in consolidation.
 
     The accompanying unaudited condensed consolidated financial statements have
been prepared in accordance with generally accepted accounting principles for
interim financial information and with the instructions to Form 10-Q and Rule
10-01 of Regulation S-X. In the opinion of management, all adjustments
(consisting only of normal recurring accruals) considered necessary to present
fairly the financial position as of December 31, 1994, the results of operations
for the three months ended December 31, 1994 and 1993 and the cash flows for the
three months ended December 31, 1994 and 1993 have been included. Certain
information and footnote disclosures normally included in financial statements
presented in accordance with generally accepted accounting principles, but which
are not required for interim reporting purposes, have been omitted. The
accompanying unaudited condensed consolidated financial statements should be
read in conjunction with the financial statements and notes thereto included in
the Company's Annual Report on Form 10-K for the fiscal year ended September 30,
1994.
 
     The Company's (loss) per share and share data in the financial statements
have been retroactively restated to reflect the effect of the 2.95-for-1 stock
split declared in connection with the public offering by the Company of its
Common Stock discussed in Note 6.
 
NOTE 2 -- INDEBTEDNESS AND FINANCIAL ARRANGEMENTS
 
     In December 1994, the Company sold substantially all of its trade accounts
and notes receivable (the "Receivables") to AmeriSource Receivables Corporation
("ARC"), a special purpose wholly-owned subsidiary, pursuant to a trade
receivables securitization program (the "Receivables Program").
Contemporaneously, the Company entered into a Receivables Purchase Agreement
with ARC, whereby ARC agreed to purchase on a continuous basis Receivables
originated by the Company. Pursuant to the Receivables Program, ARC will
transfer such Receivables to a master trust in exchange for, among other things,
certain trade receivables-backed certificates (the "Certificates").
Contemporaneously, Certificates in an aggregate principal amount of up to $230
million face amount were sold to investors. During the five year term of the
Receivables Program, the cash generated by collections on the Receivables will
be used to purchase, among other things, additional Receivables originated by
the Company. The Certificates bear interest at a rate selected by the Company
equal to (i) the higher of (a) the prime lending rate and (b) the federal funds
rate plus 50 basis points or (ii) LIBOR plus 50 basis points. In addition,
during the first seventy five days of the Receivables Program, the Company may
select an interest rate equal to the federal funds rate plus 125 basis points
(7.05% at December 31, 1994). The interest rates for the Certificates are
subject to the following step-ups: (i) with respect to the ABR tranche (based on
the higher of the prime rate or federal funds rate plus 50 basis points), an
additional 50 basis points beginning one year after the closing date (December
13, 1994) and (ii) with respect to the LIBOR tranche, an additional 12 1/2 basis
points beginning six months after the closing date, an additional 12 1/2 basis
points beginning nine months after the closing date, and an additional 75 basis
points beginning one year after the closing date. Pursuant to the Receivables
Program, on December 13, 1994, the Company sold $305 million in Receivables to
ARC in exchange for cash of $201 million and a subordinated note. ARC in turn
transferred the Receivables to the master trust for the Certificates and a
residual interest in the master trust. The Company has accounted for the
transactions contemplated by the terms of the
 
                                      F-28
<PAGE>   84
 
             AMERISOURCE DISTRIBUTION CORPORATION AND SUBSIDIARIES
 
     NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED) -- (CONTINUED)
 
NOTE 2 -- INDEBTEDNESS AND FINANCIAL ARRANGEMENTS -- (CONTINUED)
Receivables Purchase Agreement as a sale of Receivables from AmeriSource to ARC
and as a financing transaction by ARC on the Company's consolidated financial
statements. The Certificates represent fractional undivided interests in the
Receivables and other assets of the master trust, and do not otherwise represent
recourse obligations of the Company. The assets and liabilities of the master
trust have been consolidated with the Company at December 31, 1994. According to
its terms, the Receivables Program is expected to liquidate beginning in October
1999, whereupon the payment of the then-outstanding principal of the
Certificates will commence. The Certificates are also subject to early
liquidation upon the occurence of certain events. In the event of a liquidation,
losses on Receivables will first be absorbed by the residual certificate held by
ARC and collections on Receivables will first be allocated to make payments of
outstanding principal of the Certificates in accordance with their ratable
interests in the assets of the master trust, after giving effect to the
allocation of losses to the residual interest. Fees of $706,000 incurred through
December 31, 1994 in connection with establishing the Receivables Program have
been deferred and are being amortized on a straight-line basis over five years.
Interest expense on the Certificates during the three months ended December 31,
1994 was $752,000. The $202 million in Certificates outstanding at December 31,
1994 bore interest at 7.05%. Restricted cash of $6,748,000 at December 31, 1994,
represents amounts deposited in the master trust from collections on the
Receivables, which are designated for specific purposes pursuant to the
Receivables Program.
 
     At the same time that it entered into the Receivables Program, the Company
and its senior lenders amended its existing Credit Agreement. Among other
things, the Amended and Restated Credit Agreement: (i) extended the term of the
Credit Agreement until January 3, 2000; (ii) established the amount the Company
may borrow at $380 million; (iii) reduced the initial borrowing rate to LIBOR
plus 225 basis points from LIBOR plus 300 basis points and provided for further
interest rate stepdowns upon the occurrence of certain events; (iv) modified the
borrowing base availability from inventory and receivable based to inventory
based; and (v) increased the Company's ability to make acquisitions and pay
dividends.
 
     Contemporaneously with the consummation of the Receivables Program and the
execution of the Amended and Restated Credit Agreement, the Company called for
optional redemption all of the outstanding 14 1/2% senior subordinated notes at
a redemption price of 106% of the principal amount plus accrued interest through
the redemption date of January 12, 1995. In connection with the amendment of the
Credit Agreement and the redemption of the 14 1/2% senior subordinated notes,
the Company recorded an extraordinary charge of $11,749,000 during the three
months ended December 31, 1994 relating to the write-off of unamortized
financing fees and premiums to be paid on the redemption of the 14 1/2% senior
subordinated notes, net of tax benefits.
 
NOTE 3 -- EXCESS OF COST OVER NET ASSETS ACQUIRED
 
     During the third quarter of the fiscal year ended September 30, 1994, the
Company concluded that the carrying value of its excess of cost over net assets
acquired ("goodwill") could not be recovered from expected future operations and
accordingly wrote off its remaining goodwill balance of $179.8 million. See
Management's Discussion and Analysis of Financial Condition and Results of
Operations.
 
NOTE 4 -- LEGAL MATTERS AND CONTINGENCIES
 
     In the ordinary course of its business, the Company becomes involved in
lawsuits, administrative proceedings and governmental investigations, including
antitrust, environmental, product liability and regulatory agency matters. In
some of these proceedings, plaintiffs may seek to recover large and sometimes
unspecified amounts and the matters may remain unresolved for several years. The
Company does not believe that these matters, individually or in the aggregate,
will have a material adverse effect on its business or financial condition.
 
                                      F-29
<PAGE>   85
 
             AMERISOURCE DISTRIBUTION CORPORATION AND SUBSIDIARIES
 
     NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED) -- (CONTINUED)
 
NOTE 4 -- LEGAL MATTERS AND CONTINGENCIES -- (CONTINUED)
     In November 1993, the Company was named a defendant, along with six other
wholesale distributors and twenty-four pharmaceutical manufacturers, in fourteen
civil actions filed by independent retail pharmacies in the United States
District Court for the Southern District of New York. Plaintiffs seek to
establish these lawsuits and over thirty-four others (to which the Company is
not a party) filed by other pharmacies as class actions. In essence, these
lawsuits all claim that the manufacturer and wholesaler defendants have
combined, contracted and conspired to fix the prices charged to plaintiffs and
class members for prescription brand name pharmaceuticals. Specifically,
plaintiffs claim that the defendants use "chargeback agreements" to give some
institutional pharmacies discounts that are not made available to retail drug
stores. Plaintiffs seek injunctive relief, treble damages, attorneys' fees and
costs. These actions have been transferred to the United States District Court
for the Northern District of Illinois for consolidated and coordinated pretrial
proceedings. Effective October 26, 1994, the Company entered into a Judgement
Sharing Agreement with other wholesaler and pharmaceutical manufacturer
defendants. Under the Judgement Sharing Agreement: (a) the manufacturer
defendants agreed to reimburse the wholesaler defendants for litigation costs
incurred, up to an aggregate of $9 million; and (b) if a judgement is entered
into against both manufacturers and wholesalers, the total exposure for joint
and several liability of the Company is limited to the lesser of 1% of such
judgement or one million dollars. In addition, the Company has released any
claims which it might have had against the manufacturers for the claims
presented by the plaintiffs in these lawsuits. The Judgement Sharing Agreement
covers the federal court litigation as well as the cases which have been filed
in various state courts. The Company believes it has meritorious defenses to the
claims asserted in these lawsuits and intends to vigorously defend itself in all
of these cases.
 
     The Company has become aware that its former Charleston, South Carolina
distribution center was previously owned by a fertilizer manufacturer and that
there is evidence of residual soil contamination remaining from the fertilizer
manufacturing process operated on that site over thirty years ago. The Company
engaged an environmental consulting firm to conduct a soil survey and initiated
a groundwater study during fiscal 1994. The preliminary results of the
groundwater study indicate that there is lead in the groundwater at levels
requiring further investigation and response. A preliminary engineering analysis
was prepared by outside consultants during the third quarter of fiscal 1994, and
indicated that, if both soil and groundwater remediation are required, the most
likely cost of remediation efforts at the Charleston site is estimated to be
$4.1 million. Accordingly, a liability of $4.1 million was recorded during the
third quarter of fiscal 1994 to cover future consulting, legal and remediation
and ongoing monitoring costs. The Company has notified the appropriate state
regulatory agency from whom approval must be received before proceeding with any
further tests or with the actual site remediation. The approval process and
remediation could take several years to accomplish and the actual costs may
differ from the liability which has been recorded. The accrued liability, which
is reflected in other long-term liabilities on the accompanying consolidated
balance sheet, is based on an estimate of the extent of contamination and choice
of remedy, existing technology and presently enacted laws and regulations,
however, changes in remediation standards, improvements in cleanup technology
and discovery of additional information concerning the site could affect the
estimated liability in the future. The Company is investigating the possibility
of asserting claims against responsible parties for recovery of these costs.
Whether or not any recovery may be forthcoming is unknown at this time, although
the Company intends to vigorously enforce its rights and remedies.
 
     The Company has been named as a defendant in a lawsuit based upon alleged
injuries and deaths attributable to the product L-Tryptophan. The Company did
not manufacture L-Tryptophan; however, prior to an FDA recall, The Company did
distribute products containing L-Tryptophan obtained from several of its
vendors. The Company believes that it is entitled to full indemnification by its
suppliers and the manufacturer of L-Tryptophan with respect to this lawsuit and
any other lawsuits involving L-Tryptophan in which the Company may be named in
the future. To date, the indemnity to the Company in similar suits has not been
in
 
                                      F-30
<PAGE>   86
 
             AMERISOURCE DISTRIBUTION CORPORATION AND SUBSIDIARIES
 
     NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED) -- (CONTINUED)
 
NOTE 4 -- LEGAL MATTERS AND CONTINGENCIES -- (CONTINUED)
dispute and, the Company believes it is unlikely it will incur any loss as a
result of such lawsuits. The Company further believes that its insurance
coverage and supplier indemnification are adequate to cover any losses should
they occur. The Company has recently been informed that this matter has been
settled, without cost to the Company.
 
     The Company has received notices from the Internal Revenue Service
asserting deficiencies in federal corporate income taxes for the Company's
taxable years 1987 through 1991. The notices indicate an aggregate increase in
net taxable income for these years of approximately $24 million and relate
principally to the deductibility of costs incurred with respect to the
Acquisition. The Company has analyzed these matters with tax counsel and
believes it has meritorious defenses to the deficiencies asserted by the
Internal Revenue Service. The Company will contest the asserted deficiencies
through the administrative appeals process and, if necessary, litigation. The
Company believes that any amounts assessed will not have a material effect on
the financial statements of the Company.
 
     At December 31, 1994, there were contingent liabilities with respect to
taxes, guarantees of borrowings by certain customers, lawsuits and environmental
and other matters occurring in the ordinary course of business. On the basis of
information furnished by counsel and others, management believes that none of
these contingencies will materially affect the Company.
 
NOTE 5 -- EARNINGS PER SHARE
 
     For the three months ended December 31, 1994 and December 31, 1993,
earnings (loss) per share are based on 14,750,000 shares (as adjusted for the
2.95-for-1 stock split as discussed in Note 6), representing the weighted
average number of shares of all classes of Distribution's common stock
outstanding during those periods including the effect of stock options.
Substantially all of the options outstanding will be satisfied with shares
purchased or to be purchased from VPI at $.34 per share, pursuant to a prior
agreement.
 
NOTE 6 -- SUBSEQUENT EQUITY TRANSACTIONS
 
     On April 3, 1995, the Company filed a registration statement which became
effective with respect to a public offering by the Company of up to 7,590,000
shares of Class A common stock, including an over-allotment option of up to
990,000 shares. The net proceeds to the Company will be applied to fund the
redemption of one-half of the 11 1/4% senior debentures outstanding for 110% of
the principal amount plus accrued interest through date of redemption which will
result in an estimated extraordinary charge of $9.8 million. The balance of the
net proceeds will be used to fund internal growth and further expansion and for
working capital and other general corporate purposes. Prior to the sale of
common stock contemplated by the public offering, AmeriSource Distribution
Corporation amended its certificate of incorporation to change its corporate
name to AmeriSource Health Corporation.
 
     In conjunction with the sale of common stock, the Company authorized a
2.95-for-1 stock split. All references to earnings per share and share data in
the financial statements have been restated to give effect to the stock split.
In conjunction with the public offering described above, the Company anticipates
that the Company will issue 2,571,478 shares of common stock upon the exercise
of the options issued under the Distribution Plan and the 1991 Option Plan which
expire 90 days after the closing of the offering. Also pursuant to a prior
agreement, the Company expects to repurchase 1,338,894 shares of common stock
from VPI upon the exercise of the Distribution Plan and the 1991 Option Plan at
a price of $.34 per share. The Company adopted the 1995 Option Plan and the
Directors Plan which will provide for the granting over time of stock options to
acquire shares of Class A Common Stock. In conjunction with the offering, the
Company eliminated all authorized shares of preferred stock, increased the
authorized number of shares of Class A Common stock and decreased the authorized
number of shares of Class B Common Stock.
 
                                      F-31
<PAGE>   87
 
               INDEX TO UNAUDITED PRO FORMA FINANCIAL STATEMENTS
 
<TABLE>
<CAPTION>
                                                                                         PAGE
                                                                                         ----
<S>                                                                                      <C>
Consolidated Statement of Operations for the year ended September 30, 1994
  (unaudited)..........................................................................  P-3
Consolidated Statement of Operations for the three months ended December 31,
  1994 (unaudited).....................................................................  P-4
Consolidated Statement of Operations for the three months ended December 31, 1993
  (unaudited)..........................................................................  P-5
Consolidated Balance Sheet as of December 31, 1994 (unaudited).........................  P-6
</TABLE>
 
                                       P-1
<PAGE>   88
 
                    UNAUDITED PRO FORMA FINANCIAL STATEMENTS
                (DOLLARS IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)
 
     The unaudited pro forma statements of operations for the fiscal year ended
September 30, 1994 and for the three months ended December 31, 1994 and 1993 set
forth below give effect to the Refinancing, the Option Exercises and the use of
the proceeds from the Offering of $138,600 assuming the sale of 6,600,000 shares
of Common Stock offered by this Prospectus at an offering price of $21.00 per
share less estimated issuance costs of $9,662 as if such transactions had
occurred as of the beginning of the periods presented.
 
     The unaudited pro forma balance sheet as of December 31, 1994 set forth
below gives effect to the Refinancing, the Option Exercises and the Offering as
if such transactions had occurred on December 31, 1994.
 
     The unaudited pro forma financial statements are not necessarily indicative
of what the Company's results of operations and balance sheet would have been
had the Refinancing, the Option Exercises and the Offering been consummated at
the assumed dates, nor are they necessarily indicative of the Company's results
of operations and balance sheet for any future period. The unaudited pro forma
financial statements should be read in conjunction with the consolidated
financial statements and related notes thereto, "The Refinancing," "The
Offering" and "Use of Proceeds" included elsewhere in this Prospectus.
 
                                       P-2
<PAGE>   89
 
                  UNAUDITED PRO FORMA STATEMENT OF OPERATIONS
                (DOLLARS IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)
 
<TABLE>
<CAPTION>
                                                     FISCAL YEAR ENDED SEPTEMBER 30, 1994
                                        ---------------------------------------------------------------
                                                            PRO FORMA ADJUSTMENTS
                                                       -------------------------------
                                                                            OPTION
                                                                         EXERCISES AND           AS
                                        HISTORICAL     REFINANCING         OFFERING           ADJUSTED
<S>                                     <C>            <C>               <C>                 <C>
Revenues..............................  $4,301,832      $      --          $      --         $4,301,832
Cost of goods sold....................   4,066,641                                            4,066,641
Selling and administrative expenses...     142,497                                              142,497
Environmental remediation.............       4,075                                                4,075
Depreciation..........................       6,640                                                6,640
Amortization of intangibles...........       4,147                                                4,147
Write-off of excess of cost over net
  assets acquired.....................     179,824                                              179,824
                                        ----------                                           ----------
Operating income (loss)...............    (101,992)                                            (101,992)
Interest expense......................      62,611        (19,095)(1)        (10,447)(2)         33,069
                                        ----------     -----------       -------------       ----------
(Loss) before taxes, extraordinary
  items and cumulative effects of
  accounting changes..................    (164,603)        19,095             10,447           (135,061)
Taxes on income.......................       7,814          5,380(3)           2,999(3)          16,193
                                        ----------     -----------       -------------       ----------
(Loss) before extraordinary items and
  cumulative effects of accounting
  changes(4)..........................  $ (172,417)     $  13,715          $   7,448         $ (151,254)
                                         =========       ========         ==========          =========
(Loss) before extraordinary items and
  cumulative effects of accounting
  changes per share(4)................  $   (11.69)                                          $    (7.13)
                                         =========                                            =========
Weighted average common shares
  outstanding(5)......................      14,750                                               21,212
                                         =========                                            =========
</TABLE>
 
- ---------------
(1) Adjusted for interest savings consisting of: (i) a $24,712 reduction due to
    the redemption of the 14 1/2% senior subordinated notes; and (ii) a $3,539
    reduction in amortization of deferred financing fees related to the senior
    subordinated notes and the old revolving credit facility, offset by
    additional interest of $7,605 associated with the amended and restated
    revolving credit facility and Receivables Program and $1,551 of amortization
    of deferred financing fees. The Receivables Program is assumed to bear a
    cost of 5.9% per annum (representative of historical rates on fixed
    principal certificates) on the assumed $201,000 in Certificates sold to
    investors. The amended and restated revolving credit facility is assumed to
    bear a weighted average interest rate of 6.1% per annum, which is
    representative of historical interest rates.
 
(2) Adjusted for interest savings consisting of: (i) a $7,452 reduction due to
    the redemption of one-half of the 11 1/4% senior debentures; (ii) a $217
    reduction in amortization of deferred financing fees related to the senior
    debentures and (iii) a $2,778 reduction due to an assumed pay down of
    $53,373 in borrowings under the amended and restated revolving credit
    facility. The amended and restated revolving credit facility is assumed to
    bear a weighted average interest rate of 6.1% per annum, which is
    representative of historical interest rates.
 
(3) Tax provision arising from the pro forma adjustments.
 
(4) Does not reflect an extraordinary charge of $656, net of tax benefits,
    representing the write-off of unamortized financing fees relating to the
    purchase and retirement of a portion of the senior subordinated notes, the
    cumulative effect of $1,199 for the change in the accounting for
    postretirement benefits other than pensions, the cumulative effect of
    $33,399 for the change in the accounting for income taxes or a pro forma
    extraordinary charge due to the Refinancing and Offering, consisting of
    $16,293 from the early extinguishment of debt and a $11,613 write-off of
    deferred financing fees.
 
(5) The historical weighted average common shares outstanding have been restated
    for the 2.95-for-1 stock split declared in connection with the Offering. The
    pro forma weighted average common shares outstanding reflects the additional
    number of shares issued in connection with the Offering and the Option
    Exercises.
 
                                       P-3
<PAGE>   90
 
                  UNAUDITED PRO FORMA STATEMENT OF OPERATIONS
                (DOLLARS IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)
 
<TABLE>
<CAPTION>
                                                     THREE MONTHS ENDED DECEMBER 31, 1994
                                        ---------------------------------------------------------------
                                                            PRO FORMA ADJUSTMENTS
                                                       -------------------------------
                                                                            OPTION
                                                                         EXERCISES AND           AS
                                        HISTORICAL     REFINANCING         OFFERING           ADJUSTED
<S>                                     <C>            <C>               <C>                 <C>
Revenues..............................  $1,157,100      $      --           $    --          $1,157,100
Cost of goods sold....................   1,093,863                                            1,093,863
Selling and administrative expenses...      39,598                                               39,598
Depreciation..........................       1,700                                                1,700
                                        ----------                                           ----------
Operating income......................      21,939                                               21,939
Interest expense......................      17,323         (3,864)(1)        (2,827)(2)          10,632
                                        ----------     -----------       -------------       ----------
Income before taxes and extraordinary
  items...............................       4,616          3,864             2,827              11,307
Taxes on income.......................       3,730          1,388(3)          1,017(3)            6,135
                                        ----------     -----------       -------------       ----------
Income before extraordinary
  items(4)............................  $      886      $   2,476           $ 1,810          $    5,172
                                         =========       ========        ==========           =========
Income before extraordinary items per
  share(4)............................  $      .06                                           $      .24
                                         =========                                            =========
Weighted average common shares
  outstanding(5)......................      14,750                                               21,212
                                         =========                                            =========
</TABLE>
 
- ---------------
(1) Adjusted for interest savings consisting of: (i) a $6,876 reduction due to
    the redemption of the 14 1/2% senior subordinated notes; and (ii) a $599
    reduction in amortization of deferred financing fees related to the senior
    subordinated notes and the old revolving credit facility, offset by
    additional interest of $3,289 associated with the amended and restated
    revolving credit facility and Receivables Program and $322 of amortization
    of deferred financing fees. The Receivables Program is assumed to bear a
    cost of 8.1% per annum (representative of historical rates on fixed
    principal certificates) on the assumed $201,000 in Certificates outstanding.
    The amended and restated revolving credit facility is assumed to bear a
    weighted average interest rate of 8.2% per annum, which is representative of
    historical interest rates.
 
(2) Adjusted for interest savings consisting of: (i) a $1,979 reduction due to
    the redemption of one-half of the 11 1/4% senior debentures; (ii) a $54
    reduction in amortization of deferred financing fees related to the senior
    debentures and (iii) a $794 reduction due to an assumed pay down of $45,213
    in borrowings under the amended and restated revolving credit facility. The
    amended and restated revolving credit facility is assumed to bear a weighted
    average interest rate of 8.2% per annum, which is representative of
    historical interest rates.
 
(3) Tax provision arising from the pro forma adjustments.
 
(4) Does not reflect an extraordinary charge of $11,749, net of tax benefits,
    relating to the amendment of the revolving credit facility and the
    redemption of the 14 1/2% senior subordinated notes or a pro forma
    extraordinary charge due to the Offering, consisting of $7,034 from the
    early extinguishment of debt and a $2,341 write-off of deferred financing
    fees.
 
(5) The historical weighted average common shares outstanding have been restated
    for the 2.95-for-1 stock split declared in connection with the Offering. The
    pro forma weighted average common shares outstanding reflects the additional
    number of shares issued in connection with the Offering and the Option
    Exercises.
 
                                       P-4
<PAGE>   91
 
                  UNAUDITED PRO FORMA STATEMENT OF OPERATIONS
                (DOLLARS IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)
 
<TABLE>
<CAPTION>
                                                     THREE MONTHS ENDED DECEMBER 31, 1993
                                        ---------------------------------------------------------------
                                                            PRO FORMA ADJUSTMENTS
                                                       -------------------------------
                                                                            OPTION
                                                                         EXERCISES AND           AS
                                        HISTORICAL     REFINANCING         OFFERING           ADJUSTED
<S>                                     <C>            <C>               <C>                 <C>
Revenues..............................  $1,045,776       $    --            $    --          $1,045,776
Cost of goods sold....................     991,777                                              991,777
Selling and administrative expenses...      33,034                                               33,034
Depreciation..........................       1,589                                                1,589
Amortization of intangibles...........       1,376                                                1,376
                                        ----------                                           ----------
Operating income......................      18,000                                               18,000
Interest expense......................      15,233        (4,460)(1)         (2,490)(2)           8,283
                                        ----------     -----------       -------------       ----------
Income before taxes, extraordinary
  items and cumulative effects of
  accounting changes..................       2,767         4,460              2,490               9,717
Taxes on income.......................         188         1,287(3)             730(3)            2,205
                                        ----------     -----------       -------------       ----------
Income before extraordinary items and
  cumulative effects of accounting
  changes(4)..........................  $    2,579       $ 3,173            $ 1,760          $    7,512
                                         =========      ========         ==========           =========
Income before extraordinary items and
  cumulative effects of accounting
  changes per share(4)................  $      .18                                           $      .35
                                         =========                                            =========
Weighted average common shares
  outstanding(5)......................      14,750                                               21,212
                                         =========                                            =========
</TABLE>
 
- ---------------
(1) Adjusted for interest savings consisting of: (i) a $6,022 reduction due to
    the redemption of the 14 1/2% senior subordinated notes; and (ii) a $758
    reduction in amortization of deferred financing fees related to the senior
    subordinated notes and the old revolving credit facility, offset by
    additional interest of $1,932 associated with the amended and restated
    revolving credit facility and Receivables Program and $388 of amortization
    of deferred financing fees. The Receivables Program is assumed to bear a
    cost of 5.9% per annum (representative of historical rates on fixed
    principal certificates) on the assumed $201,000 in Certificates outstanding.
    The amended and restated revolving credit facility is assumed to bear a
    weighted average interest rate of 5.7% per annum, which is representative of
    historical interest rates.
 
(2) Adjusted for interest savings consisting of: (i) a $1,779 reduction due to
    the redemption of one-half of the 11 1/4% senior debentures; (ii) a $54
    reduction in amortization of deferred financing fees related to the senior
    debentures and (iii) a $657 reduction due to an assumed pay down of $53,373
    in borrowings under the amended and restated revolving credit facility. The
    amended and restated revolving credit facility is assumed to bear a weighted
    average interest rate of 5.7% per annum, which is representative of
    historical interest rates.
 
(3) Tax provision arising from the pro forma adjustments.
 
(4) Does not reflect an extraordinary charge of $656, net of tax benefits,
    representing the write-off of unamortized financing fees relating to the
    purchase and retirement of a portion of the senior subordinated notes, the
    cumulative effect of $1,199 for the change in the accounting for
    postretirement benefits other than pensions, the cumulative effect of
    $33,399 for the change in the accounting for income taxes or a pro forma
    extraordinary charge due to the Refinancing and Offering, consisting of
    $16,293 from the early extinguishment of debt and a $11,613 write-off of
    deferred financing fees.
 
(5) The historical weighted average common shares outstanding have been restated
    for the 2.95-for-1 stock split declared in connection with the Offering. The
    pro forma weighted average common shares outstanding reflects the additional
    number of shares issued in connection with the Offering and the Option
    Exercises.
 
                                       P-5
<PAGE>   92
 
                       UNAUDITED PRO FORMA BALANCE SHEET
                             (DOLLARS IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                                  DECEMBER 31, 1994
                                              ----------------------------------------------------------
                                                                 PRO FORMA ADJUSTMENTS
                                                            -------------------------------
                                                                                 OPTION
                                                                              EXERCISES AND       AS
                                              HISTORICAL    REFINANCING(1)     OFFERING(2)     ADJUSTED
<S>                                           <C>           <C>               <C>              <C>
ASSETS
Current assets
  Cash......................................  $   29,325      $       --        $      --      $  29,325
  Restricted cash...........................       6,748                                           6,748
  Accounts receivable.......................     302,765                                         302,765
  Merchandise inventories...................     514,480                                         514,480
  Prepaid expenses..........................       2,549                                           2,549
                                              ----------    --------------                     ---------
         Total current assets...............     855,867                                         855,867
Property and equipment, net.................      41,214                                          41,214
Deferred financing costs and other..........      18,646                           (2,287)        16,359
                                              ----------    --------------    -------------    ---------
         Total assets.......................  $  915,727      $       --        $  (2,287)     $ 913,440
                                              ===========   =============     ============     ===========
LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities
  Current portion of other debt.............  $      116      $       --        $      --      $     116
  Accounts payable..........................     473,757                                         473,757
  Accrued expenses..........................      43,932         (17,848)          (5,490)        20,594
  Accrued income taxes......................      10,305                           (3,374)         6,931
  Deferred income taxes.....................      29,258                                          29,258
                                              ----------    --------------    -------------    ---------
         Total current liabilities..........     557,368         (17,848)          (8,864)       530,656
Long-term debt
  Revolving credit facility.................     147,041         183,982          (44,391)       286,632
  Receivables securitization financing......     202,000                                         202,000
  14 1/2% Senior subordinated notes.........     166,134        (166,134)                             --
  Other debt................................       1,308                                           1,308
  6 1/4% Convertible subordinated
    debentures..............................         238                                             238
  11 1/4% Senior debentures.................     147,970                          (73,985)        73,985
                                              ----------    --------------    -------------    ---------
                                                 664,691          17,848         (118,376)       564,163
Other liabilities...........................       6,413                                           6,413
Stockholders' equity (deficit)
  Common stock..............................         153                               92            245
  Capital in excess of par value............       4,787                          134,793        139,580
  Retained earnings (deficit)...............    (315,847)                          (5,947)      (321,794)
  Cost of common stock in treasury..........      (1,838)                          (3,985)        (5,823)
                                              ----------    --------------    -------------    ---------
         Total stockholders' equity
           (deficit)........................    (312,745)                         124,953       (187,792)
                                              ----------    --------------    -------------    ---------
         Total liabilities and stockholders'
           equity (deficit).................  $  915,727      $       --        $  (2,287)     $ 913,440
                                              ===========   =============     ============     ===========
</TABLE>
 
- ---------------
(1) The Refinancing assumes the redemption of the 14 1/2% senior subordinated
    notes for $183,982 representing a price equal to 106% of the principal
    amount plus accrued interest through the date of redemption.
 
(2) Reflects the issuance of 2,571,478 shares of Common Stock upon the exercise
    of options under the Purchase Plan and the 1991 Option Plan and buyback of
    168,127 shares of Common Stock valued at $3,531 to satisfy minimum tax
    withholding obligations; and the repurchase from VPI of 1,338,894 shares of
    Common Stock for $454 upon the exercise of options under the Purchase Plan
    and the 1991 Option Plan. Assumes the Company would have used the net
    proceeds of $128,938 from the Offering to redeem one-half of the 11 1/4%
    senior debentures for $81,019 representing a price equal to 110% of the
    principal amount plus accrued interest through the date of redemption and to
    pay down borrowings under the amended and restated revolving credit facility
    by $44,391. Pro forma adjustments to retained earnings (deficit) include
    extraordinary charges due to the Offering of $7,034 from the early
    extinguishment of debt, $2,287 from the write-off of deferred financing
    costs, net of a $3,374 tax benefit. Pro forma adjustments to common stock
    and capital in excess of par value include: $128,938 of net proceeds from
    the Offering; reclassification of $5,490 in accrued expenses associated with
    the 1991 Option Plan and $456 of cash proceeds from the Option exercises.
    Pro forma adjustments to the cost of common stock in treasury includes
    $3,531 related to the buyback of shares to satisfy minimum tax withholding
    obligations related to the Option Exercises and $454 related to common stock
    repurchased from VPI. Pro forma adjustments to stockholders' equity
    (deficit) do not include estimated tax benefits of $15,651 related to the
    exercise of the non-qualified options under the option plans noted above,
    which will be recorded as an addition to capital in excess of par value when
    realized by the Company.
 
                                       P-6
<PAGE>   93
 
- ------------------------------------------------------
- ------------------------------------------------------
 
    NO DEALER, SALESPERSON OR OTHER PERSON HAS BEEN AUTHORIZED TO GIVE
INFORMATION OR TO MAKE ANY REPRESENTATION NOT CONTAINED IN THIS PROSPECTUS, AND,
IF GIVEN OR MADE, SUCH INFORMATION OR REPRESENTATION MUST NOT BE RELIED UPON AS
HAVING BEEN AUTHORIZED BY THE COMPANY, AMERI-SOURCE CORPORATION OR THE
UNDERWRITERS. THIS PROSPECTUS DOES NOT CONSTITUTE AN OFFER TO SELL OR THE
SOLICITATION OF ANY OFFER TO BUY ANY SECURITY OTHER THAN THE SECURITIES OFFERED
HEREBY, NOR DOES IT CONSTITUTE AN OFFER TO SELL OR THE SOLICITATION OF AN OFFER
TO BUY ANY OF THE SECURITIES TO ANY PERSON IN ANY JURISDICTION IN WHICH IT IS
UNLAWFUL TO MAKE SUCH AN OFFER OR SOLICITATION TO SUCH PERSON. NEITHER THE
DELIVERY OF THIS PROSPECTUS NOR ANY SALE MADE HEREUNDER SHALL UNDER ANY
CIRCUMSTANCES CREATE ANY IMPLICATION THAT THE INFORMATION CONTAINED HEREIN IS
CORRECT AS OF ANY DATE SUBSEQUENT TO THE DATE HEREOF OR THAT THERE HAS BEEN NO
CHANGE IN THE AFFAIRS OF THE COMPANY OR AMERISOURCE CORPORATION SINCE SUCH DATE.
 
                               ------------------
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                            PAGE
<S>                                        <C>
Prospectus Summary........................     3
Risk Factors..............................     9
The Refinancing...........................    12
Use of Proceeds...........................    13
Dividend Policy...........................    13
Dilution..................................    13
Capitalization............................    14
Selected Financial Data...................    15
Management's Discussion and Analysis of
  Financial Condition and Results of
  Operations..............................    18
Business..................................    26
Management................................    34
Certain Relationships and Transactions....    40
Principal Stockholders....................    42
Description of Capital Stock..............    43
Description of Indebtedness and
  Securitization Program..................    45
Shares Eligible for Future Sale...........    48
Certain United States Federal Tax
  Considerations for Non-U.S. Holders of
  Common Stock............................    49
Underwriting..............................    51
Legal Matters.............................    54
Experts...................................    54
Additional Information....................    55
Incorporation of Certain Documents by
  Reference...............................    55
Index to Financial Statements.............   F-1
Index to Unaudited Pro Forma Financial
  Statements..............................   P-1
</TABLE>
 
- ------------------------------------------------------
- ------------------------------------------------------
 
- ------------------------------------------------------
- ------------------------------------------------------
 
                                6,600,000 SHARES
 
                               [AMERISOURCE LOGO]
 
                                  COMMON STOCK
                              --------------------
                                   PROSPECTUS
                              --------------------
                          DONALDSON, LUFKIN & JENRETTE
                             SECURITIES CORPORATION
 
                               SMITH BARNEY INC.
 
                           BT SECURITIES CORPORATION
 
                                 APRIL 4, 1995
             ------------------------------------------------------
             ------------------------------------------------------


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