MERCK & CO INC
424B2, 1998-11-24
PHARMACEUTICAL PREPARATIONS
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<PAGE>   1
 
PROSPECTUS SUPPLEMENT                           Filed Pursuant to Rule 424(b)(2)
(To Prospectus dated October 3, 1997)                      File Number 333-36383
 
[MERCK LOGO]
 
MERCK & CO., INC.
 
$500,000,000
 
5.95% Debentures due 2028
 
Interest payable June 1 and December 1
 
ISSUE PRICE: 99.170%
 
The debentures will mature on December 1, 2028. Interest will accrue from
November 30, 1998. We may redeem the debentures, in whole or in part, at any
time at a redemption price described on page S-3. The debentures will be issued
in minimum denominations of $1,000 increased in multiples of $1,000.
 
Neither the Securities and Exchange Commission nor any state securities
commission has approved or disapproved of these securities or passed upon the
adequacy or accuracy of this Prospectus Supplement or the accompanying
Prospectus. Any representation to the contrary is a criminal offense.
 
<TABLE>
<CAPTION>
- ---------------------------------------------------------------------------------------------------------------------
                                           PRICE TO                  DISCOUNTS AND               PROCEEDS TO
                                            PUBLIC                    COMMISSIONS                THE COMPANY
- ---------------------------------------------------------------------------------------------------------------------
<S>                                     <C>                     <C>                      <C>
Per Debenture                           99.170%                 .875%                    98.295%
- ---------------------------------------------------------------------------------------------------------------------
Total                                   $495,850,000            $4,375,000               $491,475,000
- ---------------------------------------------------------------------------------------------------------------------
</TABLE>
 
The debentures will not be listed on any national securities exchange.
Currently, there is no public market for the debentures.
 
We expect that the debentures will be ready for delivery to investors in
book-entry form only through The Depository Trust Company, on or about November
30, 1998.
 
J.P. MORGAN & CO.
                 MORGAN STANLEY DEAN WITTER
 
                                SALOMON SMITH BARNEY
 
                                             MERRILL LYNCH & CO.
 
November 23, 1998
<PAGE>   2
 
No person is authorized to give any information or to make any representations
other than those contained or incorporated by reference in this Prospectus
Supplement or the Prospectus, and, if given or made, such information or
representations must not be relied upon as having been authorized. This
Prospectus Supplement and the Prospectus do not constitute an offer to sell or
the solicitation of an offer to buy any securities other than the securities
described in this Prospectus Supplement or an offer to sell or the solicitation
of an offer to buy such securities in any circumstances in which such offer or
solicitation is unlawful. Neither the delivery of this Prospectus Supplement or
the Prospectus, nor any sale made hereunder and thereunder shall, under any
circumstances, create any implication that there has been no change in the
affairs of Merck & Co., Inc. (the "Company") since the date hereof or that the
information contained or incorporated by reference herein or therein is correct
as of any time subsequent to the date of such information.
 
                               TABLE OF CONTENTS
 
                             PROSPECTUS SUPPLEMENT
 
<TABLE>
<CAPTION>
                                                              PAGE
                                                              ----
<S>                                                           <C>
Description of the Debentures...............................  S-3
Underwriting................................................  S-7
 
                            PROSPECTUS
 
Available Information.......................................    2
Incorporation of Certain Information by Reference...........    2
The Company.................................................    4
Use of Proceeds.............................................    4
Ratios of Earnings to Fixed Charges.........................    4
Description of Debt Securities..............................    4
Plan of Distribution........................................   10
Validity of Debt Securities.................................   10
Experts.....................................................   11
</TABLE>
 
                                       S-2
<PAGE>   3
 
                         DESCRIPTION OF THE DEBENTURES
 
The following description of the particular terms of the 5.95% Debentures due
2028 (the "Debentures") offered hereby supplements the general description of
Debt Securities set forth in the Prospectus, to which description reference is
hereby made. Capitalized terms not defined herein have the meanings assigned to
them in the Prospectus or the Indenture referred to in the Prospectus.
 
GENERAL
 
The Debentures will be limited to $500,000,000 aggregate principal amount and
will mature on December 1, 2028. The Debentures will bear interest from November
30, 1998 at the rate per annum shown on the cover page of this Prospectus
Supplement. Such interest will be payable on June 1 and December 1 of each year,
commencing June 1, 1999, to the person in whose name the Debentures were
registered at the close of business on the preceding May 15 or November 15, as
the case may be.
 
The defeasance and covenant defeasance provisions of the Indenture described
under "Description of Debt Securities -- Defeasance and Covenant Defeasance" in
the Prospectus will apply to the Debentures.
 
REDEMPTION AT THE OPTION OF THE COMPANY
 
The Debentures will be redeemable, in whole or from time to time in part, at the
option of the Company on any date, at a redemption price equal to the greater of
(i) 100% of the principal amount of the Debentures to be redeemed and (ii) the
sum of the present values of the remaining scheduled payments of principal and
interest thereon (exclusive of interest accrued to such redemption date)
discounted to such redemption date on a semiannual basis (assuming a 360-day
year consisting of twelve 30-day months) at the Treasury Rate plus 10 basis
points, plus, in either case, accrued and unpaid interest on the principal
amount being redeemed to such redemption date; provided that installments of
interest on Debentures which are due and payable on an interest payment date
falling on or prior to the relevant redemption date shall be payable to the
holders of such Debentures, registered as such at the close of business on the
relevant record date according to their terms and the provisions of the
Indenture.
 
"Treasury Rate" means, with respect to any redemption date for the Debentures,
(i) the yield, under the heading which represents the average for the
immediately preceding week, appearing in the most recently published statistical
release designated "H.15(519)" or any successor publication which is published
weekly by the Board of Governors of the Federal Reserve System and which
establishes yields on actively traded United States Treasury securities adjusted
to constant maturity under the caption "Treasury Constant Maturities" for the
maturity corresponding to the Comparable Treasury Issue (if no maturity is
within three months before or after the maturity of the Debentures, yields for
the two published maturities most closely corresponding to the Comparable
Treasury Issue shall be determined and the Treasury Rate shall be interpolated
or extrapolated from such yields on a straight line basis, rounding to the
nearest month) or (ii) if such release (or any successor release) is not
published during the week preceding the calculation date or does not contain
such yields, the rate per annum equal to the semi-annual equivalent yield to
maturity of the Comparable Treasury Issue, calculated using a price for the
Comparable Treasury Issue (expressed as a percentage of its principal amount)
equal to the Comparable Treasury Price for such redemption date. The Treasury
Rate shall be calculated on the third Business Day preceding the redemption
date.
 
"Comparable Treasury Issue" means the United States Treasury security selected
by the Independent Investment Banker as having a maturity comparable to the
remaining term of the Debentures to be redeemed that would be utilized, at the
time of selection and in accordance with customary financial practice, in
pricing new issues of corporate debt securities of comparable maturity to the
remaining term of the Debentures.
 
                                       S-3
<PAGE>   4
 
"Independent Investment Banker" means J.P. Morgan Securities Inc. or, if such
firm is unwilling or unable to select the Comparable Treasury Issue, an
independent banking institution of national standing appointed by the Trustee
after consultation with the Company.
 
"Comparable Treasury Price" means, with respect to any redemption date for the
Debentures, (i) the average of three Reference Treasury Dealer Quotations for
such redemption date, after excluding the highest and lowest such Reference
Treasury Dealer Quotations, or (ii) if the Trustee obtains fewer than three such
Reference Treasury Dealer Quotations, the average of all such quotations.
 
"Reference Treasury Dealer" means each of J.P. Morgan Securities Inc., Morgan
Stanley & Co. Incorporated and Salomon Smith Barney Inc. and their respective
successors; provided, however, that if any of the foregoing shall cease to be a
primary U.S. Government securities dealer in New York City (a "Primary Treasury
Dealer"), the Company will substitute therefor another Primary Treasury Dealer.
 
"Reference Treasury Dealer Quotations" means, with respect to each Reference
Treasury Dealer and any redemption date, the average, as determined by the
Trustee, of the bid and asked prices for the Comparable Treasury Issue
(expressed in each case as a percentage of its principal amount) quoted in
writing to the Trustee by such Reference Treasury Dealer at 5:00 p.m., New York
City time, on the third Business Day preceding such Redemption Date.
 
Notice of any redemption by the Company will be mailed at least 30 days but not
more than 60 days before any redemption date to each holder of Debentures to be
redeemed. If less than all the Debentures are to be redeemed at the option of
the Company, the Trustee shall select, in such manner as it shall deem fair and
appropriate, the Debentures to be redeemed.
 
Unless the Company defaults in payment of the redemption price, on and after any
redemption date interest will cease to accrue on the Debentures or portions
thereof called for redemption.
 
BOOK-ENTRY SYSTEM
 
Upon issuance, the Debentures will be represented by one or more global
debentures (the "Global Debentures"). Each Global Debenture will be deposited
with, or on behalf of, The Depository Trust Company, as Depository (the
"Depository"), and registered in the name of a nominee of the Depository.
 
Ownership of beneficial interests in a Global Debenture will be limited to
institutions that have accounts with the Depository or its nominee
("participants") or persons that may hold interests through participants. The
Company has been advised by the Depository that upon receipt of any payment of
principal of, or premium, if any, or interest in respect of, a Global Debenture,
the Depository will credit, on its book-entry registration and transfer system,
accounts of participants with payments in amounts proportionate to their
respective beneficial interests in the principal amount of such Global
Debentures as shown on the records of the Depository. Ownership of beneficial
interests by participants in such a Global Debenture will be evidenced only by,
and the transfer of that ownership interest will be effected only through,
records maintained by the Depository or its nominee. Ownership of beneficial
interests in such Global Debenture by persons that hold through participants
will be evidenced only by, and the transfer of that ownership interest with such
participant will be effected only through, records maintained by such
participant. The laws of some jurisdictions require that certain purchasers of
securities take physical delivery of such securities in definitive form. Such
laws may impair the ability to transfer beneficial interests in such Global
Debenture.
 
Payment of principal of, and premium, if any, and interest on, any Global
Debenture registered in the name of or held by the Depository or its nominee
will be made to the Depository or its nominee, as the case may be, as the holder
of the Global Debenture. Payments by participants to owners of beneficial
interests in a Global Debenture held through such participants will be governed
by standing instructions and customary practices, as is now the case with
securities held for the accounts of customers registered in "street name", and
will be the sole responsibility of such participants. Neither the Company, the
Trustee, nor any agent of the Company or the Trustee will have any
responsibility or liability for any aspects of the Depository's records or any
participant's records relating to or payments made on account of beneficial
 
                                       S-4
<PAGE>   5
 
ownership interests in a Global Debenture or for maintaining, supervising or
reviewing any of the Depository's records or any participant's records relating
to such beneficial ownership interests.
 
No Global Debenture described above may be transferred except as a whole by the
Depository to a nominee of the Depository or by a nominee of the Depository to
the Depository or another nominee of the Depository.
 
No Global Debenture may be exchanged in whole or in part for Debentures
registered, and no transfer of a Global Debenture in whole or in part may be
registered, in the name of any person other than the Depository or any nominee
of the Depository unless (i) the Depository has notified the Company that it is
unwilling or unable to continue a Depository for such Global Debenture or has
ceased to be qualified to act as such as required by the Indenture, (ii) there
shall have occurred and be continuing an Event of Default with respect to such
Global Debenture or (iii) the Company determines in its sole discretion at any
time that such Global Debenture shall be so exchangeable.
 
Any Global Debenture that is exchangeable pursuant to the preceding sentence
shall be exchangeable in whole for separate Debentures in registered form of any
authorized denomination and of like tenor and aggregate principal amount. Such
Debentures shall be registered in the name or names of such person or persons as
the Depository shall instruct the Trustee. It is expected that such instructions
would be based upon directions received by the Depository from its participants
with respect to ownership of beneficial interests in such Global Debenture.
 
As long as the Depository, or its nominee, is the registered holder of a Global
Debenture, the Depository or such nominee, as the case may be, will be
considered the sole owner and holder of such Global Debenture for all purposes
under the Debentures and the Indenture. Except in the limited circumstances
referred to above, owners of beneficial interests in a Global Debenture will not
be entitled to have such Global Debenture registered in their names, will not
receive or be entitled to receive physical delivery of Debentures in exchange
therefor and will not be considered to be the owners or holders of such Global
Debenture for any purpose under the Debentures or the Indenture. Accordingly,
each person owning a beneficial interest in such Global Debenture must rely on
the procedures of the Depository and, if such person is not a participant, on
the procedures of the participant through which such person owns its interest,
to exercise any rights of a holder under the Indenture.
 
The Indenture provides that the Depository, as a holder, may appoint agents and
otherwise authorize participants to give or take any request, demand,
authorization, direction, notice, consent, waiver, or other action which a
holder is entitled to give or take under the Indenture. The Company understands
that, under existing industry practices, in the event that the Company requests
any action of holders or an owner of beneficial interest in such Global
Debenture desires to give or take any action that a holder is entitled to give
or take under the Indenture, the Depository would authorize the participants
holding the relevant beneficial interests to give or take such action, and such
participants would authorize beneficial owners owning through such participants
to give or take such action or would otherwise act upon the instructions of
beneficial owners owning through them.
 
The Depository has advised the Company as follows: the Depository is a
limited-purpose trust company organized under the New York Banking Law, a
"banking organization" within the meaning of the New York Banking Law, a member
of the Federal Reserve System, a "clearing corporation" within the meaning of
the New York Uniform Commercial Code, and a "clearing agency" registered
pursuant to the provisions of Section 17A of the Securities Exchange Act of
1934, as amended. The Depository was created to hold securities of its
participants and to facilitate the clearance and settlement of securities
transactions, such as transfers and pledges, among its participants in such
securities through electronic computerized book-entry changes in accounts of the
participants, thereby eliminating the need for physical movement of securities
certificates. The Depository's participants include securities brokers and
dealers, banks, trust companies, clearing corporations, and certain other
organizations, some of whom (and/or their representatives) own the Depository.
Access to Depository's book-entry system is also available to others, such as
banks, brokers, dealers and trust companies that clear through or maintain a
custodial relationship with a participant, either directly or indirectly.
 
                                       S-5
<PAGE>   6
 
The Depository has advised the Company that management of the Depository is
aware that some computer applications, systems, and the like for processing data
("Systems") that are dependent upon calendar dates, including dates before, on,
and after January 1, 2000, may encounter "Year 2000 problems". The Depository
has informed its direct and indirect participants and other members of the
financial community (the "Industry") that it has developed and is implementing a
program so that its Systems, as the same relate to the timely payment of
distributions (including principal and interest payments) to securityholders,
book-entry deliveries, and settlement of trades within the Depository
("Depository Services"), continue to function appropriately. This program
includes a technical assessment and a remediation plan, each of which is
complete. Additionally, the Depository's plan includes a testing phase, which is
expected to be completed within appropriate time frames.
 
However, the Depository's ability to perform properly its services is also
dependent upon other parties, including, but not limited to, issuers and their
agents, as well as the Depository's direct participants and indirect
participants, third party vendors from whom the Depository licenses software and
hardware, and third party vendors on whom the Depository relies for information
or the provision of services, including telecommunication and electrical utility
service providers, among others. The Depository has informed the Industry that
it is contacting (and will continue to contact) third party vendors from whom
the Depository acquires services to: (i) impress upon them the importance of
such services being Year 2000 compliant; and (ii) determine the extent of their
efforts for Year 2000 remediation (and, as appropriate, testing) of their
services. In addition, the Depository is in the process of developing such
contingency plans as it deems appropriate.
 
According to the Depository, the foregoing information in the preceding two
paragraphs with respect to the Depository has been provided to the Industry for
informational purposes only and is not intended to serve as a representation,
warranty, or contract modification of any kind.
 
SAME-DAY SETTLEMENT AND PAYMENT
 
Settlement for the Debentures will be made in immediately available funds. So
long as the Debentures are represented by one or more Global Debentures, all
payments of principal and premium, if any, and interest thereon will be made by
the Company in immediately available funds.
 
So long as the Debentures are represented by one or more Global Debentures
registered in the name of the Depository or its nominee and its procedures so
permit, the Debentures will trade in the Depository's Same-Day Funds Settlement
System, and secondary market trading activity in the Debentures will therefore
be required by the Depository to settle in immediately available funds.
 
                                       S-6
<PAGE>   7
 
                                  UNDERWRITING
 
Subject to the terms and conditions set forth in the Underwriting Agreement
incorporated to the Pricing Agreement, dated the date hereof, the Company has
agreed to sell to each of the Underwriters named below, severally, and each of
the Underwriters, for whom J.P. Morgan Securities Inc., Morgan Stanley & Co.
Incorporated and Salomon Smith Barney Inc. are acting as representatives (the
"Representatives"), has severally agreed to purchase, the principal amount of
the Debentures set forth opposite its name below:
 
<TABLE>
<CAPTION>
                                                               PRINCIPAL AMOUNT
UNDERWRITER                                                     OF DEBENTURES
- -----------                                                    ----------------
<S>                                                            <C>
J.P. Morgan Securities Inc.................................      $250,000,000
Morgan Stanley & Co. Incorporated..........................       125,000,000
Salomon Smith Barney Inc...................................       100,000,000
Merrill Lynch, Pierce, Fenner & Smith
             Incorporated..................................        25,000,000
                                                                 ------------
Total......................................................      $500,000,000
                                                                 ============
</TABLE>
 
Under the terms and conditions of the Underwriting Agreement, if the
Underwriters take any of the Debentures, then the Underwriters are obligated to
take and pay for all of the Debentures.
 
The Debentures are a new issue of securities with no established trading market
and will not be listed on any national securities exchange. The Representatives
have advised the Company that they intend to make a market for the Debentures,
but they have no obligations to do so and may discontinue market making at any
time without providing any notice. No assurance can be given as to the liquidity
of any trading market for the Debentures.
 
The Underwriters initially propose to offer part of the Debentures directly to
the public at the offering prices described on the cover page and in part to
certain dealers at a price that represents a concession not in excess of .50% of
the principal amount of the Debentures. Any Underwriters may allow, and any such
dealer may reallow, a concession not in excess of .25% of the principal amount
of the Debentures to certain other dealers. After initial offering of the
Debentures, the Underwriters may from time to time vary the offering price and
other selling terms.
 
The Company has also agreed to indemnify the Underwriters against certain
liabilities, including liabilities under the Securities Act of 1933, as amended,
or to contribute to payments which the Underwriters may be required to make in
respect of any such liabilities.
 
In connection with the offering of the Debentures, the Representatives may
engage in transactions that stabilize, maintain or otherwise affect the price of
the Debentures. Specifically, the Representatives may overallot in connection
with the offering of the Debentures, creating a syndicate short position. In
addition, the Representatives may bid for, and purchase, Debentures in the open
market to cover syndicate short positions or to stabilize the price of the
Debentures. Finally, the underwriting syndicate may reclaim selling concessions
allowed for distributing the Debentures in the offering of the Debentures, if
the syndicate repurchases previously distributed Debentures in syndicate
covering transactions, stabilization transactions or otherwise. Any of these
activities may stabilize or maintain the market price of the Debentures above
independent market levels. The Representatives are not required to engage in any
of these activities, and may end any of them at any time.
 
Expenses associated with this offering, to be paid by the Company, are estimated
to be $100,000.
 
In the ordinary course of their respective businesses, the Underwriters and
their affiliates have engaged, and may in the future engage, in commercial
banking and/or investment banking transactions with the Company and its
affiliates. Dennis Weatherstone, a member of the Board of Directors of J.P.
Morgan & Co. Incorporated, of which J.P. Morgan Securities Inc. is a subsidiary,
is also a member of the Board of Directors of the Company.
 
                                       S-7
<PAGE>   8
 
PROSPECTUS
 
                                 $1,670,000,000
 
[MERCK LOGO]                   MERCK & CO., INC.
                                DEBT SECURITIES
                            ------------------------
 
     Merck & Co., Inc. (the "Company") may offer from time to time in one or
more series its debt securities (the "Debt Securities") at an aggregate initial
offering price not to exceed $1,670,000,000 (or its equivalent in foreign
currencies or currency units). The Company will offer Debt Securities to the
public on terms determined by market conditions.
 
                            ------------------------
 
     The accompanying Prospectus Supplement sets forth the specific designation,
aggregate principal amount, purchase price, maturity, interest rate (or manner
of calculation thereof), time of payment of interest (if any), listing (if any)
on a securities exchange, the form of the Debt Securities (which may be in
registered form or book-entry form) and any other specific terms of the Debt
Securities and the name of and compensation to each dealer, underwriter, or
agent (if any) involved in the sale of the Debt Securities covered by the
Prospectus Supplement.
 
                            ------------------------
 
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.
 
                            ------------------------
 
     Debt Securities may be offered through dealers, through underwriters, or
through agents designated from time to time, as set forth in the Prospectus
Supplement, and Debt Securities may be offered to other purchasers directly or
through agents. Net proceeds to the Company will be the purchase price in the
case of a purchaser or dealer, the public offering price less discount in the
case of an underwriter, or the purchase price less commission in the case of an
agent -- in each case, less other expenses attributable to issuance and
distribution. See "Plan of Distribution" for possible indemnification
arrangements for dealers, underwriters, and agents.
 
                            ------------------------
 
     This Prospectus may not be used to consummate the sale of any Securities
unless accompanied by a Prospectus Supplement.
 
                            ------------------------
 
                 THE DATE OF THIS PROSPECTUS IS OCTOBER 3, 1997
<PAGE>   9
 
     NO PERSON HAS BEEN AUTHORIZED TO GIVE ANY INFORMATION OR TO MAKE ANY
REPRESENTATION OTHER THAN THOSE CONTAINED IN THIS PROSPECTUS AND ANY
ACCOMPANYING PROSPECTUS SUPPLEMENT IN CONNECTION WITH THE OFFERING DESCRIBED
HEREIN AND THEREIN, AND, IF GIVEN OR MADE, SUCH OTHER INFORMATION OR
REPRESENTATION MUST NOT BE RELIED UPON AS HAVING BEEN AUTHORIZED BY THE COMPANY
OR BY ANY UNDERWRITER, DEALER OR AGENT. NEITHER THIS PROSPECTUS NOR ANY
PROSPECTUS SUPPLEMENT SHALL CONSTITUTE AN OFFER TO SELL OR A SOLICITATION OF AN
OFFER TO BUY ANY SECURITIES OFFERED HEREUNDER IN ANY JURISDICTION TO ANY PERSON
TO WHOM IT IS UNLAWFUL TO MAKE SUCH OFFER OR SOLICITATION OR SALE IN SUCH
JURISDICTION. NEITHER THE DELIVERY OF THIS PROSPECTUS OR ANY PROSPECTUS
SUPPLEMENT NOR ANY SALE MADE HEREUNDER IMPLIES THAT THERE HAS BEEN NO CHANGE IN
THE AFFAIRS OF THE COMPANY AT ANY TIME SUBSEQUENT TO THE DATE HEREOF OR THAT THE
INFORMATION HEREIN IS CORRECT AS OF ANY TIME SUBSEQUENT TO ITS DATE.
 
                             AVAILABLE INFORMATION
 
     The Company is subject to the informational requirements of the Securities
Exchange Act of 1934, as amended (the "Exchange Act"), and in accordance
therewith files reports, proxy statements and other information with the
Securities and Exchange Commission (the "Commission").
 
     All such reports, proxy statements and other information, including the
documents incorporated by reference herein, can be inspected and copied at
prescribed rates at the public reference facilities maintained by the Commission
at 450 Fifth Street, N.W., Washington, D.C. 20549, and at the Commission's
regional offices at 7 World Trade Center, 13th floor, New York, New York 10048,
and 1400 Citicorp Center, 500 West Madison Street, Suite 1400, Chicago, Illinois
60661. Certain of such reports, proxy statements and other information are also
available over the Internet at http://www.sec.gov. Such material can also be
inspected at the office of the New York Stock Exchange, 20 Broad Street, New
York, New York 10005, and at the office of the Philadelphia Stock Exchange, 1900
Market Street, Philadelphia, Pennsylvania 19130.
 
     The Company has filed a registration statement on Form S-3 (herein,
together with all amendments and exhibits, referred to as the "Registration
Statement") under the Securities Act of 1933, as amended (the "Securities Act"),
with respect to the securities offered hereby. This Prospectus does not contain
all of the information set forth in the Registration Statement, certain parts of
which are omitted in accordance with the rules and regulations of the
Commission. For further information, reference is made to the Registration
Statement and the exhibits filed as a part thereof. Statements contained herein
concerning any document filed as an exhibit are not necessarily complete and, in
each instance, reference is made to the copy of such document filed as an
exhibit to the Registration Statement. Each such statement is qualified in its
entirety by such reference.
 
               INCORPORATION OF CERTAIN INFORMATION BY REFERENCE
 
     The following documents filed by the Company (Exchange Act File No. 1-3305)
with the Commission are hereby incorporated by reference into this Prospectus:
 
          (a) Annual Report on Form 10-K, filed March 19, 1997, for the fiscal
     year ended December 31, 1996.
 
          (b) Quarterly Report on Form 10-Q, filed on May 13, 1997, for the
     quarter ended March 31, 1997.
 
          (c) Current Report on Form 8-K, filed May 15, 1997.
 
          (d) Quarterly Report on Form 10-Q, filed August 13, 1997, for the
     quarter ended June 30, 1997.
 
     All documents filed by the Company pursuant to Section 13(a), 13(c), 14 or
15(d) of the Exchange Act after the date of this Prospectus and prior to the
termination of the offering of the Debt Securities hereby shall be deemed to be
incorporated by reference into this Prospectus and to be a part of this
Prospectus from the date of filing of such document.
 
     Any statement contained in a document incorporated or deemed to be
incorporated by reference herein shall be deemed to be modified or superseded
for purposes of this Prospectus and the Registration Statement
                                        2
<PAGE>   10
 
of which it is a part to the extent that a statement contained herein or in any
other subsequently filed document which is also incorporated or deemed to be
incorporated by reference herein modifies or supersedes such statement. Any
statement so modified or superseded shall not be deemed, except as so modified
or superseded, to constitute a part of this Prospectus or such Registration
Statement.
 
     The Company will provide without charge to each person to whom a copy of
this Prospectus has been delivered, upon written or oral request of such person,
a copy of any or all of the documents which have been or may be incorporated
herein by reference, other than exhibits to such documents (unless such exhibits
are specifically incorporated by reference into the information that the
Registration Statement incorporates). Requests for such copies should be
directed to the Office of the Secretary, Merck & Co., Inc., P.O. Box 100, One
Merck Drive, Whitehouse Station, New Jersey 08889-0100, telephone number (800)
613-2104.
 
                                        3
<PAGE>   11
 
                                  THE COMPANY
 
     The Company is a leading research-driven pharmaceutical company that
discovers, develops, manufactures and markets a broad range of human and animal
health products and services.
 
     Human health products include therapeutic and preventive agents, generally
sold by prescription, for the treatment of human disorders. Among these are
elevated cholesterol products, hypertension/heart failure products,
anti-ulcerants, antibiotics, ophthalmologicals, vaccines/biologicals, benign
prostatic hyperplasia products, osteoporosis products, an HIV protease
inhibitor, anti-inflammatories/analgesics, psychotherapeutics and a muscle
relaxant. The Company also provides human health services, principally managed
prescription drug programs.
 
     A portion of the Company's human health products business is conducted
through joint ventures, including joint ventures with Astra AB, Johnson &
Johnson, E.I. DuPont de Nemours and Company, Pasteur-Merieux Connaught and
American Home Products Corporation.
 
     Through a joint venture with Rhone-Poulenc, the Company also conducts an
animal health and poultry genetics business. The joint venture, which is equally
owned by the Company and Rhone-Poulenc, conducts the Company's and Rhone
Poulenc's former animal health and poultry genetics businesses. Animal health
products include medicinals used to control and alleviate disease in livestock,
small animals and poultry. These products are primarily antiparasitics and also
include coccidiostats for the treatment of poultry diseases. The poultry
genetics business products include poultry breeding stock selected for increased
or improved meat or egg production.
 
     The Company was incorporated in the State of New Jersey in 1927 and
maintains its principal offices at Whitehouse Station, New Jersey. The Company's
address is P.O. Box 100, One Merck Drive, Whitehouse Station, New Jersey
08889-0100 and its telephone number is (908) 423-1000.
 
                                USE OF PROCEEDS
 
     Except as otherwise described in the applicable Prospectus Supplement, the
Company intends to use the net proceeds from the sale of the Debt Securities for
general corporate purposes, including the reduction of short-term debt. Funds
not required immediately for such purposes may be invested temporarily in
short-term marketable securities.
 
                      RATIOS OF EARNINGS TO FIXED CHARGES
 
     The following table sets forth the Company's consolidated ratios of
earnings to fixed charges for the indicated periods:
 
<TABLE>
<CAPTION>
                                            SIX
                                           MONTHS
                                           ENDED            YEAR ENDED DECEMBER 31,
                                          JUNE 30,    ------------------------------------
                                            1997      1996    1995    1994    1993    1992
                                          --------    ----    ----    ----    ----    ----
<S>                                       <C>         <C>     <C>     <C>     <C>     <C>
Ratio of earnings to fixed charges......     29        23      38      28      27      34
</TABLE>
 
     For purposes of computing these ratios, "earnings" consist of income before
income taxes, cumulative effect of accounting changes, one-third of rents
(deemed by the Company to be representative of the interest factor inherent in
rents), interest expense, net of amounts capitalized, and dividends on preferred
stock of subsidiary companies. "Fixed charges" consist of one-third of rents,
interest expense as reported in the Company's consolidated financial statements
and dividends on preferred stock of subsidiary companies.
 
                         DESCRIPTION OF DEBT SECURITIES
 
     The Debt Securities are to be issued under the Indenture dated as of April
1, 1991, as amended and supplemented (the "Indenture"), between the Company and
First Trust of New York, National Association,
 
                                        4
<PAGE>   12
 
as Trustee (the "Trustee"), a copy of which is filed (or incorporated by
reference) as an exhibit to the Registration Statement. The following summaries
of certain provisions of the Indenture do not purport to be complete and are
subject to, and are qualified in their entirety by reference to, all the
provisions of the Indenture, including the definitions therein of certain terms.
Wherever particular Sections or defined terms of the Indenture are referred to,
such Sections or defined terms are incorporated herein by reference.
 
     The following sets forth certain general terms and provisions of the Debt
Securities offered hereby. The particular terms of the Debt Securities offered
by any Prospectus Supplement (the "Offered Debt Securities") will be described
in the Prospectus Supplement relating to such Offered Debt Securities (the
"Applicable Prospectus Supplement").
 
GENERAL
 
     The Indenture does not limit the amount of Debt Securities that may be
issued thereunder and Debt Securities may be issued thereunder from time to time
in one or more series. The Debt Securities will be unsecured and unsubordinated
obligations of the Company and will rank equally and ratably with other
unsecured and unsubordinated obligations of the Company.
 
     Unless otherwise indicated in the Applicable Prospectus Supplement,
principal of, premium, if any, and interest on the Debt Securities will be
payable, and the transfer of Debt Securities will be registrable, at the office
or agency to be maintained by the Company in The City of New York and at any
other office or agency maintained by the Company for such purpose. (Sections
301, 305 and 1002) The Debt Securities will be issued only in fully registered
form without coupons and, unless otherwise indicated in the Applicable
Prospectus Supplement, in denominations of $1,000 or integral multiples thereof.
(Section 302) No service charge will be made for any registration of transfer or
exchange of the Debt Securities, but the Company may require payment of a sum
sufficient to cover any tax or other governmental charge imposed in connection
therewith. (Section 305)
 
     The Applicable Prospectus Supplement will describe the following terms of
the Offered Debt Securities: (1) the title of the Offered Debt Securities; (2)
any limit on the aggregate principal amount of the Offered Debt Securities; (3)
the Person to whom any interest on the Offered Debt Securities shall be payable,
if other than the Person in whose name that Security (or one or more Predecessor
Securities) is registered at the close of business on the Regular Record Date
for such interest; (4) the date or dates on which the principal of the Offered
Debt Securities is payable; (5) the rate or rates at which the Offered Debt
Securities shall bear interest, if any, the date or dates from which any such
interest shall accrue, the Interest Payment Dates on which any such interest
shall be payable and the Regular Record Date for the interest payable on any
Interest Payment Date; (6) the place or places where the principal of and any
premium and interest on the Offered Debt Securities shall be payable; (7) the
period or periods within which, the price or prices at which and the terms and
conditions upon which the Offered Debt Securities may be redeemed, in whole or
in part, at the option of the Company; (8) the obligation, if any, of the
Company to redeem or purchase the Offered Debt Securities pursuant to any
sinking fund or analogous provisions or at the option of a Holder thereof and
the period or periods within which, the price or prices at which and the terms
and conditions upon which the Offered Debt Securities shall be redeemed or
purchased, in whole or in part, pursuant to such obligation; (9) if other than
denominations of $1,000 and any integral multiple thereof, the denominations in
which the Offered Debt Securities shall be issuable; (10) the currency,
currencies or currency units in which payment of the principal of and any
premium and interest on any Offered Debt Securities shall be payable if other
than the currency of the United States of America; (11) if the amount of
payments of principal of or any premium or interest on any Offered Debt
Securities may be determined with reference to an index or formula, the manner
in which such amounts shall be determined; (12) if the principal of or any
premium or interest on any Offered Debt Securities is to be payable, at the
election of the Company or a Holder thereof, in one or more currencies or
currency units other than that or those in which the Securities are stated to be
payable, the currency, currencies or currency units in which payment of the
principal of and any premium and interest on the Offered Debt Securities as to
which such election is made shall be payable, and the periods within which and
the terms and conditions upon which such election is to be made; (13) if other
than the principal amount thereof, the portion of the principal amount of the
Offered Debt Securities which shall be payable upon
                                        5
<PAGE>   13
 
declaration of acceleration of the Maturity thereof; (14) the applicability of
the provisions described under "Defeasance and Covenant Defeasance"; (15) if the
Offered Debt Securities will be issuable only in the form of a Book-Entry
Security as described under "Book-Entry Debt Securities," the Depository or its
nominee with respect to the Offered Debt Securities and the circumstances under
which the Book-Entry Security may be registered for transfer or exchange or
authenticated and delivered in the name of a Person other than the Depository or
its nominee; and (16) any other terms of the Offered Debt Securities. (Section
301)
 
     The Debt Securities may be issued as Original Issue Discount Debt
Securities to be offered and sold at a substantial discount below their stated
principal amount. Federal income tax consequences and other special
considerations applicable to Original Issue Discount Debt Securities and any
Debt Securities treated as having been issued with original issue discount for
Federal income tax purposes will be described in the Applicable Prospectus
Supplement. "Original Issue Discount Debt Securities" means any Debt Security
which provides for an amount less than the principal amount thereof to be due
and payable upon the declaration of acceleration of the Maturity thereof upon
the occurrence of an Event of Default and the continuation thereof. (Section
101)
 
BOOK-ENTRY DEBT SECURITIES
 
     The Debt Securities of a series may be issued in the form of one or more
Book-Entry Securities that will be deposited with a Depository or its nominee
identified in the Applicable Prospectus Supplement. In such a case, one or more
Book-Entry Securities will be issued in a denomination or aggregate
denominations equal to the portion of the aggregate principal amount of
Outstanding Debt Securities of the series to be represented by such Book-Entry
Security or Securities. Unless and until it is exchanged in whole or in part for
Debt Securities in definitive registered form, a Book-Entry Security may not be
registered for transfer or exchange except as a whole by the Depository for such
Book-Entry Security to a nominee or such Depository and except in the
circumstances described in the Applicable Prospectus Supplement. (Sections 204
and 305)
 
     The specific terms of the depository arrangement with respect to any
portion of a series of Debt Securities to be represented by a Book-Entry
Security will be described in the Applicable Prospectus Supplement.
 
CERTAIN COVENANTS OF THE COMPANY
 
     Subsidiaries.  The term "Subsidiary" is defined in the Indenture as a
corporation more than 50% of the outstanding stock of which is owned directly or
indirectly by the Company and/or one or more Subsidiaries. The term "Domestic
Subsidiary" is defined in the Indenture as a Subsidiary substantially all the
fixed assets of which are located, or substantially all the business of which is
carried on, within the United States (including Puerto Rico), or which owns or
leases any Principal Domestic Manufacturing Property, but such term excludes any
Subsidiary the principal business of which is the financing of the operations of
the Company or its Subsidiaries outside the United States (including Puerto
Rico) (but such Subsidiary is excluded only so long as it neither owns nor
leases any Principal Domestic Manufacturing Property). (Section 101)
 
     Restrictions on Secured Debt.  The Indenture provides that if the Company
or any Domestic Subsidiary shall incur, issue, assume or guarantee any Debt
secured by a Mortgage on any Principal Domestic Manufacturing Property of the
Company or any Domestic Subsidiary or on any shares of stock or Debt of any
Domestic Subsidiary, the Company will secure, or cause such Domestic Subsidiary
to secure, the Outstanding Debt Securities equally and ratably with (or prior
to) such secured Debt, unless after giving effect thereto the aggregate amount
of all such secured Debt together with all Attributable Debt of the Company and
of any Domestic Subsidiary in respect of sale and leaseback transactions
involving Principal Domestic Manufacturing Properties would not exceed 10% of
the Consolidated Net Tangible Assets of the Company and its consolidated
Subsidiaries. For the purpose of providing such equal and ratable security, the
principal amount of Outstanding Debt Securities of any series of Original Issue
Discount Securities shall be such portion of the principal amount as specified
in the terms of that series that would be payable upon acceleration of the
Maturity thereof at the time of such determination. This restriction will not
apply to, and there shall be excluded in computing secured Debt for the purpose
of such restriction, Debt secured by (a) Mortgages on property of, or on any
shares of stock or Debt of, any corporation existing at the time such
corporation
 
                                        6
<PAGE>   14
 
becomes a Domestic Subsidiary, (b) Mortgages in favor of the Company or a
Domestic Subsidiary, (c) Mortgages in favor of governmental bodies of the United
States or any State or Puerto Rico or any other country or any political
subdivision thereof to secure partial, progress or advance payments, (d)
Mortgages on property, shares of stock or Debt, purchase money Mortgages and
construction Mortgages existing at or incurred within 120 days of the time of
acquisition thereof (including acquisition through merger or consolidation), and
(e) certain extensions, renewals or replacements of Mortgages referred to in the
foregoing clauses (a) through (d) inclusive. (Section 1008) The Indenture does
not restrict the incurrence of unsecured Debt by the Company or its
Subsidiaries.
 
     "Principal Domestic Manufacturing Property" is defined in the Indenture to
include any facility (together with the land on which it is erected and fixtures
comprising a part thereof) used primarily for manufacturing, processing or
warehousing of the Company's products and located in the United States
(including Puerto Rico), owned or leased by the Company or a Subsidiary and
having a gross book value in excess of 1% of Consolidated Net Tangible Assets,
other than any such facility or portion thereof (i) which is financed by certain
governmental obligations the interest on which is excludable from gross income
of the holder thereof pursuant to the provisions of Section 103 (a) of the
Internal Revenue Code or Section 745 of Title 48 of the United States Code or
(ii) which in the opinion of the Board of Directors of the Company is not of
material importance to the total business conducted by the Company and its
Subsidiaries as an entirety. "Consolidated Net Tangible Assets" is defined as
the aggregate amount of all assets (after deducting intangible assets and the
amount of all current liabilities) of the Company and its consolidated
Subsidiaries. "Mortgage" is defined as any mortgage, pledge, lien, security
interest, conditional sale or other title retention agreement or similar
encumbrance. "Attributable Debt" is defined to mean the total net amount of rent
(discounted at the rate of 1% per annum over the weighted average Yield to
Maturity of the Outstanding Debt Securities compounded semi-annually) required
to be paid during the remaining term of any lease. (Section 101)
 
     Restrictions on Sales and Leaseback Transactions.  The Indenture provides
that neither the Company nor any Domestic Subsidiary may, after the effective
date of the Indenture, enter into any sale and leaseback transaction involving
any Principal Domestic Manufacturing Property which has been or is to be sold or
transferred, more than 120 days after the acquisition thereof or the completion
of construction and commencement of full operations thereof, unless (a) the
Company or such Domestic Subsidiary could create Debt secured by a Mortgage on
such property as described under "Restrictions on Secured Debt" in an amount
equal to the Attributable Debt with respect to the sale and leaseback
transaction without equally and ratably securing the Outstanding Debt Securities
or (b) the Company, within 120 days, applies to the retirement of its Funded
Debt which is pari passu (as defined in the Indenture) with the Outstanding
Securities an amount equal to the greater of (i) the net proceeds of the sale of
the Principal Domestic Manufacturing Property leased pursuant to such
arrangement or (ii) the fair market value of the Principal Domestic
Manufacturing Property so leased (subject to credits for certain voluntary
retirements of Funded Debt). (Section 1009) "Funded Debt" is defined as
indebtedness for money borrowed having a maturity at or being renewable or
extendible to a date more than 12 months from the date of determination.
(Section 101) This restriction does not apply to any sale and leaseback
transaction (a) between the Company and a Subsidiary or between Subsidiaries, or
(b) involving the taking back of a lease for a period of three years or less.
(Section 1009)
 
     Unless otherwise indicated in the Applicable Prospectus Supplement, the
Indenture does not contain covenants specifically designed to protect Holders in
the event of a highly leveraged transaction involving the Company.
 
EVENTS OF DEFAULT
 
     Any one of the following events constitutes an Event of Default under the
Indenture with respect to Securities of any series: (a) failure to pay any
interest on any Debt Security of that series when due, continued for 30 days;
(b) failure to pay principal of or any premium on any Debt Security of that
series when due; (c) failure to deposit any sinking fund payment, when due, in
respect of any Debt Security of that series; (d) failure to perform, or breach
of, any covenant or warranty of the Company in the Indenture (other than a
                                        7
<PAGE>   15
 
covenant included in the Indenture solely for the benefit of a series of Debt
Securities thereunder other than that series) continued for 90 days after
written notice as provided in the Indenture; (e) certain events in bankruptcy,
insolvency or reorganization of the Company; or (f) any other Event of Default
provided with respect to Debt Securities of that series. (Section 501)
 
     If any Event of Default with respect to the Debt Securities of any series
at the time Outstanding occurs and is continuing, either the Trustee or the
Holders of at least 25 percent in aggregate principal amount of the Outstanding
Debt Securities of that series may declare the principal amount (or, if the Debt
Securities of that series are Original Issue Discount Debt Securities, such
portion of the principal amount as may be specified in the terms thereof) of all
the Debt Securities of that series to be due and payable immediately. At any
time after a declaration of acceleration with respect to Debt Securities of any
series has been made, but before a judgment or decree based on acceleration has
been obtained, the Holders of a majority in aggregate principal amount of
Outstanding Debt Securities of that series may, under certain circumstances,
rescind and annul such acceleration. (Section 502)
 
     Reference is made to the Applicable Prospectus Supplement relating to any
series of Offered Debt Securities that are Original Issue Discount Debt
Securities for the particular provisions relating to acceleration of the Stated
Maturity of a portion of the principal amount of such series of Original Issue
Discount Debt Securities upon the occurrence of an Event of Default and the
continuation thereof.
 
     The Indenture provides that, subject to the duty of the Trustee during
default to act with the required standard of care, the Trustee will be under no
obligation to exercise any of its rights or powers under the Indenture at the
request or direction of any of the Holders, unless such Holders shall have
offered to the Trustee reasonable indemnity. (Section 603) Subject to such
provisions for the indemnification of the Trustee and to certain other
conditions, the Holders of a majority in aggregate principal amount of the
Outstanding Debt Securities of any series will have the right to direct the
time, method and place of conducting any proceeding for any remedy available to
the Trustee, or exercising any trust or power conferred on the Trustee, with
respect to the Debt Securities of that series. (Section 512)
 
     No Holder of any series of Debt Securities will have any right to institute
any proceeding with respect to the Indenture or for any remedy thereunder,
unless such Holder shall have previously given to the Trustee written notice of
a continuing Event of Default and unless the Holders of at least 25 percent in
principal amount of the Outstanding Debt Securities of that series shall have
made written request, and offered reasonable indemnity, to the Trustee to
institute such proceeding as trustee, and the Trustee shall not have received
from the Holders of a majority in aggregate principal amount of the Outstanding
Debt Securities of that series a direction inconsistent with such request and
shall have failed to institute such proceeding within 60 days. (Section 507)
However, such limitations do not apply to a suit instituted by a Holder of a
Debt Security for enforcement of payment of the principal of and premium, if
any, or interest on such Debt Security on or after the respective due dates
expressed in such Debt Security. (Section 508)
 
     The Company is required to furnish to the Trustee annually a statement as
to the performance by the Company of certain of its obligations under the
Indenture and as to any default in such performance. (Section 1004)
 
MODIFICATION AND WAIVER
 
     Modifications and amendments of the Indenture may be made by the Company
and the Trustee with the consent of the Holders of not less than a majority in
aggregate principal amount of the Outstanding Debt Securities of each series
issued under the Indenture and affected by the modification or amendments;
provided, however, that no such modification or amendment may, without the
consent of the Holders of all Debt Securities affected thereby, (i) change the
Stated Maturity of the principal of, or any installment of principal of or
interest on, any Debt Security, (ii) reduce the principal amount of, or the
premium, if any, or (except as otherwise provided in the Applicable Prospectus
Supplement) interest on, any Debt Security (including in the case of an Original
Issue Discount Debt Security the amount payable upon acceleration of the
Maturity thereof); (iii) change the place or currency of payment of principal
of, premium, if any, or interest on any Debt Security; (iv) impair the right to
institute suit for the enforcement of any payment on any
                                        8
<PAGE>   16
 
Debt Security on or after the Stated Maturity thereof (or in the case of
redemption, on or after the Redemption Date); or (v) reduce the percentage in
principal amount of Outstanding Debt Securities of any series, the consent of
whose Holders is required for modification or amendment of the Indenture or for
waiver of compliance with certain provisions of the Indenture or for waiver of
certain defaults. (Section 902)
 
     The Holders of at least a majority in aggregate principal amount of the
Outstanding Debt Securities of any series may, on behalf of all Holders of that
series, waive compliance by the Company with certain restrictive provisions of
the Indenture. (Section 1010) The Holders of not less than a majority in
aggregate principal amount of the Outstanding Debt Securities of any series may,
on behalf of all Holders of that series, waive any past default under the
Indenture, except a default in the payment of principal, premium or interest or
in respect of a covenant or provision of the Indenture that cannot be modified
or amended without the consent of the Holder of each Outstanding Debt Security
of such series affected thereby. (Section 513)
 
CONSOLIDATION, MERGER AND SALE OF ASSETS
 
     The Company may not consolidate with or merge into any other Person or
transfer or lease its assets substantially as an entirety to any Person and may
not permit any Person to merge into or consolidate with the Company or transfer
or lease its assets substantially as an entirety to the Company, unless (i) any
successor or purchaser is a corporation, partnership, or trust organized under
the laws of the United States of America, any State or the District of Columbia,
and any such successor or purchaser expressly assumes the Company's obligations
on the Debt Securities under a supplemental Indenture, (ii) immediately after
giving effect to the transaction no Event of Default, and no event which, after
notice or lapse of time or both, would become an Event of Default, shall have
occurred and be continuing, (iii) if properties or assets of the Company become
subject to a Mortgage not permitted by the Indenture, the Company or such
successor Person, as the case may be, takes such steps as shall be necessary
effectively to secure the Securities equally and ratably with (or prior to) all
indebtedness secured thereby, and (iv) the Company has delivered to the Trustee
an Officers' Certificate and an Opinion of Counsel stating compliance with these
provisions. (Section 801)
 
DEFEASANCE AND COVENANT DEFEASANCE
 
     The Indenture provides, unless otherwise indicated in the Applicable
Prospectus Supplement with respect to the Offered Debt Securities, that the
Company, at the Company's option, (a) will be discharged from any and all
obligations in respect of the Debt Securities of any series (except for certain
obligations to register the transfer of or exchange of Debt Securities of such
series, replace stolen, lost or mutilated Debt Securities of such series,
maintain paying agencies and hold moneys for payment in trust) or (b) need not
comply with certain restrictive covenants of the Indenture, including those
described under "Certain Covenants", and the occurrence of an event described in
clause (e) under "Events of Default" shall no longer be an Event of Default, in
each case, if the Company deposits, in trust, with the Trustee money or U.S.
Government Obligations, which through the payment of interest thereon and
principal thereof in accordance with their terms will provide money, in an
amount sufficient to pay all the principal of and interest on the Debt
Securities of such series on the dates such payments are due (which may include
one or more redemption dates designated by the Company) in accordance with the
terms of the Debt Securities of such series. Such a trust may only be
established if, among other things, (i) no Event of Default or event which with
the giving of notice or lapse of time, or both, would become an Event of Default
under the Indenture shall have occurred and be continuing on the date of such
deposit, (ii) such deposit will not cause the Trustee to have any conflicting
interest with respect to other securities of the Company and (iii) the Company
shall have delivered an Opinion of Counsel to the effect that the Holders will
not recognize income, gain or loss for Federal income tax purposes as a result
of such deposit or defeasance and will be subject to Federal income tax in the
same manner as if such defeasance had not occurred, which Opinion of Counsel, in
the case of clause (a) above, must refer to and be based upon a published ruling
of the Internal Revenue Service, a private ruling of the Internal Revenue
Service addressed to the Company, or otherwise a change in applicable Federal
income tax law occurring after the date of the Indenture. In the event the
Company omits to comply with its remaining obligations under the Indenture after
a defeasance of the Indenture with respect to the Debt Securities of any series
as described under clause (b) above and the Debt Securities of such series are
declared due and payable
 
                                        9
<PAGE>   17
 
because of the occurrence of any Event of Default, the amount of money and U.S.
Government Obligations on deposit with the Trustee may be insufficient to pay
amounts due on the Debt Securities of such series at the time of the
acceleration resulting from such Event of Default. However, the Company will
remain liable in respect of such payments. (Article Thirteen)
 
CONCERNING THE TRUSTEE
 
     First Trust of New York, National Association, is Trustee under the
Indenture. The Trustee performs services for the Company in the ordinary course
of business.
 
                              PLAN OF DISTRIBUTION
 
     The Company may sell the Debt Securities being offered hereby through
agents, through underwriters and through dealers, and Debt Securities may be
sold to other purchasers directly or through agents.
 
     The distribution of the Debt Securities may be effected from time to time
in one or more transactions at a fixed price or prices, which may be changed, or
at market prices prevailing at the time of sale, at prices related to such
prevailing market prices or at negotiated prices.
 
     In connection with the sale of Debt Securities, underwriters may receive
compensation from the Company or from purchasers of Debt Securities for whom
they may act as agents in the form of discounts, concessions or commissions.
Underwriters may sell Debt Securities to or through dealers, and such dealers
may receive compensation in the form of discounts, concessions or commissions
from the underwriters and/or commissions from the purchasers for whom they may
act as agents. Underwriters, dealers and agents that participate in the
distribution of Debt Securities may be deemed to be underwriters, and any
discounts or commissions received by them from the Company, and any profit on
the resale of Debt Securities by them, may be deemed to be underwriting
discounts and commissions, under the Securities Act. Any such underwriter or
agent will be identified, and any such compensation received from the Company
will be described, in the Applicable Prospectus Supplement.
 
     Underwriters, dealers and agents that participate in the distribution of
the Debt Securities or their affiliates may be customers of, extend credit to or
engage in transactions with or perform services for the Company in the ordinary
course of business.
 
     The Debt Securities are not proposed to be listed on a securities exchange,
and any underwriters or dealers will not be obligated to make a market in Debt
Securities. The Company cannot predict the activity or liquidity of any trading
in the Debt Securities.
 
     Underwriters participating in the offering of the Debt Securities may
purchase and sell Debt Securities in the open market. These transactions may
include overallotment and stabilizing transactions and purchasees to cover short
positions created by such underwriters in connection with the offering. Such
underwriters may also impose a penalty bid, whereby selling concessions allowed
to broker-dealers in respect of the Debt Securities sold in the offering may be
reclaimed by such underwriters if such Debt Securities are repurchased by the
underwriters in stabilizing transactions. These activities may stabilize,
maintain or otherwise affect the market price of the Debt Securities, which may
be higher than the price that might otherwise prevail in the open market; and
these activities, if commenced, may be discontinued at any time.
 
                          VALIDITY OF DEBT SECURITIES
 
     The validity of Debt Securities offered hereby will be passed upon for the
Company by Mary M. McDonald, Esq., Senior Vice President and General Counsel of
the Company, and for any underwriters or agents by Sullivan & Cromwell, New
York, New York. Ms. McDonald and her husband beneficially own an aggregate of
35,622 shares of Common Stock and hold options to acquire 600 shares which are
exercisable within 60 days.
 
                                       10
<PAGE>   18
 
                                    EXPERTS
 
     The consolidated financial statements of the Company at December 31, 1996
and 1995 and for each of the three years in the period ended December 31, 1996,
appearing in its Annual Report on Form 10-K, for the fiscal year ended December
31, 1996 and incorporated in this Prospectus by reference, have been audited by
Arthur Andersen LLP, independent public accountants, as indicated in their
reports with respect thereto and incorporated by reference herein. The financial
statements referred to above are included in reliance upon the reports of said
firm and upon the authority of said firm as experts in auditing and accounting.
 
                                       11


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