ENTROPIN INC
SB-2/A, 1998-08-19
MANAGEMENT SERVICES
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      As filed with the Securities and Exchange Commission on August 19, 1998
    
                                                      Registration No. 333-51737
- --------------------------------------------------------------------------------

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
   
                                 AMENDMENT NO. 2
    
                                       to
                                    FORM SB-2

                             REGISTRATION STATEMENT
                                    under the
                             SECURITIES ACT OF 1933

                                 ENTROPIN, INC.
                 (Name of small business issuer in its charter)

      Colorado                        283                      84-1090424
- ----------------------     ----------------------------   ----------------------
(State or jurisdiction     (Primary Standard Industrial     (I.R.S. Employer
 of incorporation or       Classification Code Number)    Identification Number)
    organization)             
                                 Entropin, Inc.
                               45926 Oasis Street
                             Indio, California 92201
                                 (760) 775-8333
                   (Address and telephone number of principal
               executive offices and principal place of business)
                                ----------------

                                Higgins D. Bailey
                              Chairman of the Board
                                 Entropin, Inc.
                               45926 Oasis Street
                             Indio, California 92201
                                 (760) 775-8333
                  (Name, address and telephone number of agent
                                  for service)

                        Copies of all communications to:

                            A. Thomas Tenenbaum, Esq.
                               Judy A. Gooch, Esq.
                       Brenman Bromberg & Tenenbaum, P.C.
                             Mellon Financial Center
                         1775 Sherman Street, Suite 1001
                             Denver, Colorado 80203
                                 (303) 894-0234
                               (303) 839-1633 FAX

APPROXIMATE  DATE OF PROPOSED SALE TO PUBLIC:  AS SOON AS PRACTICABLE  AFTER THE
EFFECTIVE DATE OF THE REGISTRATION STATEMENT.

     If this Form is filed to  register  additional  securities  for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following box
and list  the  Securities  Act  registration  statement  number  of the  earlier
effective registration statement for the same offering. [ ]

     If this Form is a  post-effective  amendment  filed pursuant to Rule 462(c)
under the  Securities  Act,  check the following box and list the Securities Act
registration  statement number of the earlier effective  registration  statement
for the same offering. [ ]

     If delivery of the  prospectus is expected to be made pursuant to Rule 434,
please check the following box. [ ]

     The Registrant  hereby amends this  registration  statement on such date or
dates as may be necessary to delay its effective date until the registrant shall
file a further  amendment  which  specifically  states  that  this  registration
statement shall  thereafter  become effective in accordance with section 8(a) of
the  Securities  Act of 1933 or until the  registration  statement  shall become
effective on such date as the Commission,  acting pursuant to said section 8(a),
may determine.
<PAGE>
<TABLE>
<CAPTION>
                                          CALCULATION OF REGISTRATION FEE
============================================================================================================================
                                                                                          Proposed
                                                    Amount            Proposed             maximum            Amount of
Title of each class of                               to be             maximum            aggregate         registration
securities to be registered                        registered      offering price(1)   offering price(1)        fee
- ----------------------------------------------------------------------------------------------------------------------------
<S>                                                 <C>               <C>               <C>                  <C>
Common Stock ($.001 Par Value)                      5,754,546         $  7.50           $43,159,095          $ 12,731.93
- ----------------------------------------------------------------------------------------------------------------------------
Common Stock Underlying Options                       296,668            7.50             2,225,010               656.38
- ----------------------------------------------------------------------------------------------------------------------------
TOTAL                                               6,051,214         $  7.50           $45,384,105           $13,388.31
- -----------------------------------------------------------------------------------------------------------------------------
(1)      Estimated solely for the purpose of calculating the registration fee pursuant to Rules 457(a) and (g).
</TABLE>










<PAGE>
<TABLE>
<CAPTION>
                                              CROSS REFERENCE SHEET


Form SB-2
Item No.                                                                       Sections in Prospectus
- ---------                                                                      ----------------------
<S>       <C>                                                                  <C>
1         Front of Registration Statement and Outside Front
          Cover of Prospectus................................................. Cover Page



2         Inside Front and Outside Back Cover Pages of
          Prospectus.......................................................... Inside Front Cover Pages (I)(ii);
                                                                               Table of Contents


3         Summary Information and Risk Factors................................ Prospectus Summary; Risk Factors

4         Use of Proceeds..................................................... Prospectus Summary; Use of Proceeds

5         Determination of Offering Price..................................... Cover Page; Plan of Distribution

6         Selling Security Holders............................................ Selling Security Holders

7         Plan of Distribution................................................ Prospectus Summary; Plan of Distribution

8         Legal Proceedings................................................... Legal Proceedings

9         Directors, Executive Officers, Promoters and
          Control Persons..................................................... Management - Directors and Executive Officers

10        Security Ownership of Certain Beneficial Owners
          and Management...................................................... Security Ownership of Certain Beneficial Owners
                                                                               and Management

11        Description of Securities........................................... Description of Securities

12        Interest of Named Experts and Counsel............................... Experts

13        Disclosure of Commission Position on
          Indemnification for Securities Act Liabilities...................... Statement as to Indemnification

14        Organization within Last Five Years................................. The Company; Interests of Management and
                                                                               Others in Certain Transactions

15        Description of Business............................................. Prospectus Summary; Risk Factors; The Company

16        Management's Discussion and Analysis or Plan of
          Operation........................................................... Management's Discussion and Analysis or Plan of
                                                                               Operation

17        Description of Property............................................. The Company

18        Certain Relationships and Related Transactions...................... Interests of Management and Others in Certain
                                                                               Transactions
19        Market for Common Equity and Related
          Stockholder Matters................................................. Risk Factors; Market for Common Equity,
                                                                               Dividend Policy and Related Shareholder Matters


<PAGE>

20        Executive Compensation.............................................. Management - Executive Compensation

21        Financial Statements................................................ Index to Financial Statements

22        Changes In and Disagreements With Accountants
          on Accounting and Financial Disclosure.............................. Experts

23        Indemnification of Directors and Officers........................... Indemnification of Directors and Officers

24        Other Expenses of Issuance and Distribution......................... Other Expenses of Issuance and Distribution

25        Recent Sales of Unregistered Securities............................. Recent Sales of Unregistered Securities

26        Exhibits............................................................ Exhibits

27        Undertakings........................................................ Undertakings
</TABLE>




<PAGE>

PROSPECTUS


                                 ENTROPIN, INC.

                                6,051,214 Shares

         This  Prospectus  relates to the resale by the  holders  (the  "Selling
Security  Holders")  named herein,  for their own  accounts,  of up to 6,051,214
shares of Common Stock,  $.001 par value  (hereinafter  sometimes referred to as
the "Shares") of Entropin,  Inc., a Colorado  corporation (the  "Company").  The
Company is  obligated  to  register:  (a)  5,400,001  Shares and 180,001  Shares
underlying options pursuant to the terms of an Agreement and Plan of Merger (the
"Merger Agreement");  (b) 300,000 Shares in accordance with certain registration
rights granted to purchasers in a private placement offering of securities; and,
(c) 54,545 Shares and an additional  116,667 Shares underlying  options pursuant
to contract agreements to register such shares . See Description of Securities -
Options for the terms of the options.
   
         All common stock owned by the  Company's  officers and  directors  have
been  registered  for sale.  Pursuant  to an  agreement  among  certain  Selling
Security  Holders  (the  "Shareholders  Agreement")  who are  Company  officers,
directors and major  shareholders,  an aggregate of 4,748,388  Shares which they
own may be sold or otherwise  disposed of for a period of one year from the date
of this Prospectus only as the Company may permit.  The  Shareholders  Agreement
was entered in anticipation  that potential funding sources at times may require
or request a  restriction  on  disposition  of  securities  owned by a company's
management  and major  shareholders.  The  Shares  subject  to the  Shareholders
Agreement  may be offered or sold under this  Prospectus  during the term of the
Shareholders  Agreement upon the Company's  consent and after  expiration of the
Shareholders  Agreement  without such consent.  Sales of substantial  amounts of
Common Stock by the persons subject to the Shareholders  Agreement are likely to
have a  depressive  effect on the  market  price of the  Common  Stock and could
impair the  Company's  ability to raise  capital  through the sale of its equity
securities. See The Company and Selling Security Holders.
    
         The  Company  was  formerly  known  as  Vanden   Capital  Group,   Inc.
("Vanden").  In January  1998,  the Company and  Entropin,  Inc.,  a  California
corporation, ("Old Entropin") consummated the Merger Agreement pursuant to which
the Company  acquired all of the issued and  outstanding  shares of stock of Old
Entropin. In connection with the Merger Agreement,  the Company changed its name
to Entropin, Inc. and succeeded to the business activity of Old Entropin,  which
ceased to exist.

         The Company's  Common Stock is traded on the Electronic  Bulletin Board
under the trading symbol "ETOP". See Market for Common Equity,  Dividend Policy,
The Company and Description of Securities.

         The  shares  of  Common  Stock  being  offered  hereby  are  not  being
underwritten  in this  offering,  and the Company  will not receive any proceeds
from their sale.  The Company will receive cash proceeds  from the exercise,  if
any, of outstanding options. See Selling Security Holders.

THESE SECURITIES ARE SPECULATIVE AND INVOLVE A HIGH DEGREE OF RISK TO INVESTORS.
PROSPECTIVE PURCHASERS SHOULD CONSIDER CAREFULLY THE DISCUSSION UNDER RISK
FACTORS COMMENCING ON PAGE 4 OF THIS PROSPECTUS.

         Brokers and dealers  who propose to effect  transactions  in the Shares
should assure  themselves of the existence of  appropriate  exemptions  from the
securities  registration  requirements  of the securities laws of the applicable
jurisdictions or effectuate such  registrations in connection with any offers or
sales of the Shares.
                              -------------------

  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.
                              -------------------

                 The date of this Prospectus is          , 1998
                                                ---------

<PAGE>

NO  PERSON  HAS  BEEN  AUTHORIZED  TO  GIVE  ANY  INFORMATION  OR  TO  MAKE  ANY
REPRESENTATIONS OTHER THAN THOSE CONTAINED IN THIS PROSPECTUS IN CONNECTION WITH
THE OFFER MADE BY THIS  PROSPECTUS  AND, IF GIVEN OR MADE,  SUCH  INFORMATION OR
REPRESENTATIONS  MUST  NOT BE  RELIED  UPON AS  HAVING  BEEN  AUTHORIZED  BY THE
COMPANY. THIS PROSPECTUS DOES NOT CONSTITUTE AN OFFER TO SELL OR SOLICITATION OF
AN  OFFER  TO  BUY  ANY  OF THE  SECURITIES  OFFERED  HEREBY  BY  ANYONE  IN ANY
JURISDICTION  IN WHICH SUCH OFFER OR  SOLICITATION IS NOT AUTHORIZED OR IN WHICH
THE PERSON MAKING SUCH OFFER OR SOLICITATION IS NOT QUALIFIED TO DO SO OR TO ANY
PERSON TO WHOM IT IS  UNLAWFUL TO MAKE SUCH OFFER OR  SOLICITATION.  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 TIME SUBSEQUENT TO THE DATE OF THIS PROSPECTUS.

<TABLE>
<CAPTION>
                                            TABLE OF CONTENTS
   
<S>                                             <C>      <C>                                                  <C>
Summary........................................  1       Security Ownership of Certain
Risk Factors...................................  4         Beneficial Owners and Management.................. 37
Use of Proceeds................................ 14       Interests of Management and Others in Certain
Capitalization................................. 14       Transactions........................................ 39
Market For Common Equity,                                Description of Securities........................... 41
 Dividend Policy and                                     Selling Security Holders............................ 43
 Related Shareholder Matters................... 15       Plan of Distribution................................ 47
Management's Discussion and                              Legal Matters....................................... 48
 Analysis or Plan of Operations................ 15       Experts............................................. 48
The Company.................................... 18       Shares Eligible for Future Sale..................... 48
Legal Proceedings.............................. 28       Additional Information.............................. 49
Management..................................... 28       Glossary............................................ 50
Executive Compensation......................... 34       Financial Statements............................... F-1
    
</TABLE>










                                                     ii

<PAGE>
                                     SUMMARY

          The  following  summary  is  qualified  in its  entirety  by the  more
detailed  information  and  financial  statements  appearing  elsewhere  in this
Prospectus.  Technical  terms used  herein  are  defined  in the  Glossary.  See
Glossary.

                                   THE COMPANY

          Entropin,  Inc. (the "Company") is a developing  stage company engaged
in the pharmaceutical  research business.  The Company is currently developing a
patented medicinal preparation known as Esterom(R), formulated for the treatment
of impaired  range of motion  associated  with acute lower back sprain and acute
painful shoulder.

          The Company's  scientific advisor,  Dr. James E. Wynn and the inventor
of Esterom(R),  Dr. Lowell M. Somers,  have identified three new molecules which
serve as the basis for seven U.S.  patents  owned by the  Company.  The  Company
estimates  that an  average  of 17 years of  patent  protection  remain.  Patent
applications  have been filed in 29 foreign countries which the Company believes
will provide protection for a significant market worldwide. Future plans include
the  research  and  development  of  additional  drugs  related to  Esterom(R)'s
technology.

          The Company has a current and open  Investigational  New Drug  ("IND")
file with the U.S.  Food and Drug  Administration  ("FDA") and is in Phase II of
the approval process.  Four preclinical  animal studies and FDA Phase I Clinical
Studies on Esterom(R) have been successfully completed. The results of the Phase
II study indicate that the drug is safe and effective.  The Company has designed
the Phase III Protocol and must complete the Phase III Study prior to completion
of the New Drug Application  ("NDA") required by the FDA for final approval of a
new prescription drug.

          The two indications tested with the topical  application of Esterom(R)
were acute lower back sprain and acute painful shoulder.  The range of motion of
each condition was improved  significantly when compared with patients receiving
a placebo.  The Company  believes that these two  conditions  affect about sixty
million Americans each year and represent a substantial  domestic market.  There
is no estimate  available for the size of the international  market,  which also
appears  to have  potential.  Additional  markets  under  consideration  are the
domestic and international veterinary markets.
   
         The Company was incorporated in the State of Colorado in 1987 as Vanden
Capital Group, Inc. for the primary purpose of providing business and management
advisory services.  The Company also had been considering business acquisitions.
On January 15, 1998, the Company and Entropin,  Inc., a California  corporation,
("Old  Entropin")  consummated  an  Agreement  and Plan of Merger ( the  "Merger
Agreement"),  whereby the  Company  acquired  all of the issued and  outstanding
shares of Old  Entropin  stock in exchange  for:  (i) the  issuance of 5,700,001
shares of the  Company's  Common Stock (which  amount  includes  300,000  shares
issued pursuant to a private placement conducted by Old Entropin); (ii) issuance
under an option of 180,001 shares of the Company's Common Stock;  and, (iii) the
issuance of 3,210,487  shares of the  Company's  Series A redeemable  non-voting
preferred stock. In connection with the Merger,  the Company changed its name to
Entropin,  Inc., and succeeded to the business activity of Old Entropin. For the
period from  inception  through  June 30, 1998,  the Company had an  accumulated
deficit of $5,515,015.
    
                                       -1-

<PAGE>

          The Company is obligated to register: (a) 5,400,001 Shares and 180,001
Shares  underlying  options  pursuant to the terms of an  Agreement  and Plan of
Merger (the "Merger  Agreement");  (b) 300,000 Shares in accordance with certain
registration  rights  granted to purchasers in a private  placement  offering of
securities;  and, (c) 54,545 Shares and an additional  116,667 Shares underlying
options  pursuant  to  contractual  agreements  to  register  such  shares.  See
Description of Securities - Options for the terms of the options.

          The Company has entered an agreement  with its officers and  directors
and major shareholders  pursuant to which 4,748,388 Shares owned by such persons
may be sold only as the  Company  may  permit  for a period of one year from the
date of this Prospectus.  The Shareholders Agreement was entered in anticipation
that potential  funding sources at times may require or request a restriction on
disposition   of  securities   owned  by  a  company's   management   and  major
shareholders. See The Company.

          The  Company's  executive  offices are located at 45926 Oasis  Street,
Indio, California 92201 and its telephone number is (760) 775-8333.
<TABLE>
<CAPTION>
                                  THE OFFERING

<S>                                             <C>
Common Stock Offered for
Selling Security Holders....................    6,051,214 shares of Common Stock $0.001 par value.
                                                (includes 296,668 shares underlying options held by
                                                certain Selling Security Holders).  See Security Holders.

Use of Proceeds.............................    The Company will not receive any proceeds from the sale
                                                of the Shares. The Company will receive cash proceeds
                                                from the exercise, if any, of outstanding options. See Use
                                                of Proceeds and The Company.

Risk Factors................................    An investment in the securities offered by this Prospectus
                                                involves a high degree of risk and should be considered
                                                only by persons who can afford the loss of their entire
                                                investment.  Prospective purchasers should review
                                                carefully the entire Prospectus and should consider,
                                                among other things the matters set forth under Risk
                                                Factors.
</TABLE>

                             SELECTED FINANCIAL DATA

          The following  selected  financial  data should be read in conjunction
with  Management's  Discussion  and  Analysis  or  Plan of  Operations,  and the
financial  statements and notes thereto  included  elsewhere in this Prospectus.
The  statements  of  operations  data for the years ended  December 31, 1997 and

                                      -2-
<PAGE>

1996,  and the balance sheet data at December 31, 1997 and 1996 are derived from
and should be read in conjunction  with the financial  statements of the Company
and notes thereto audited by Causey Demgen & Moore Inc., independent auditors.
   
         The selected  financial  data as of and for the six month period ending
June 30, 1998 and 1997,  and for the period from August 27, 1984  (inception) to
June 30,  1998  are  derived  from the  unaudited  financial  statements  of the
Company,  which,  in  the  opinion  of the  Company  reflected  all  adjustments
(consisting of only normal recurring accruals) necessary for a fair presentation
of the  results for the six months  ended June 30, 1998 and 1997,  which are not
necessarily indicative of the results for a full year.
<TABLE>
<CAPTION>
 
                                                                                                               Unaudited
                                                                                                               Cumulative
                                                                                                              Amounts from
                                                                                    Unaudited                  Inception
STATEMENTS OF OPERATIONS                                                         Six Months ended               through
 DATA:                                  Years Ended December 31,                    June 30                     June 30
                                        ------------------------               ------------------             ------------
                                         1996               1997              1997             1998               1998
                                         ----               ----              ----             ----               ----
<S>                                   <C>              <C>                 <C>             <C>                <C>
Revenues                              $       -        $         -         $       -       $        -         $         -

Research and development                167,818            877,209            68,956          254,228           4,201,082

Other costs and expenses (net)          207,320            474,239            94,682          446,612           1,313,933
                                      ---------        -----------         ---------       ----------         -----------
Net loss                              $(375,138)       $(1,351,448)        $(163,638)      $( 700,840)        $(5,515,015)
                                      =========        ===========         =========       ==========         ===========
Basic net loss per common
share(1)                              $    (.07)       $      (.26)        $    (.03)      $     (.12)        $     (1.03)
                                      =========        ===========         =========       ==========         ===========
Common shares used in
computing basic net loss per
common share(1)                       5,220,000          5,220,000         5,220,000        5,935,000           5,330,000
                                      =========          =========         =========        =========           =========
</TABLE>
<TABLE>
<CAPTION>
BALANCE SHEET DATA:                                                                                    Unaudited Pro
                                      December 31,          December 31,            Unaudited            forma(2)
                                         1996                  1997               June 30, 1998        June 30, 1998 
                                      ------------          ------------          --------------       --------------
<S>                                   <C>                   <C>                    <C>                   <C>
Cash and cash equivalents             $     1,677           $       291            $   138,715           $ 1,288,715

Working capital (deficit)             $  (162,916)          $  (423,395)           $    34,122           $ 1,184,122

Total assets                          $   225,003           $   282,493            $   429,051           $ 1,579,051

Long-term liabilities                 $ 3,143,137           $ 3,365,982            $   162,639           $   162,639

Series A Redeemable preferred
stock                                           -                     -              3,210,487             3,210,487

Series B Convertible preferred
stock                                           -                     -                      -             1,150,000

Stockholders' equity (deficit)        $(3,087,727)          $(3,512,175)           $(3,048,668)          $(3,048,668)

</TABLE>
    
(1)  See Note 5 to the Financial Statements for a description of the computation
     of net income (loss) from continuing operations per common share.
   
(2)  Adjusted  to give  effect to net  proceeds  from sale of 250,500  shares of
     Series B convertible redeemable preferred stock at $5.00 per share.
    
                                       -3-
<PAGE>
                                  RISKS FACTORS

         The Shares offered hereby are  speculative in nature and involve a high
degree of risk. The Shares should be purchased only by persons who can afford to
lose their entire  investment.  Therefore,  prior to making any  purchase,  each
prospective  investor should consider very carefully the following risk factors,
as well as all of the other  information set forth elsewhere in this Prospectus,
including the information contained in the financial statements.

SUBSTANTIAL CAPITAL NEEDS; UNCERTAINTY OF ADDITIONAL FUNDING
   
         The  Company's  operations to date have  consumed  substantial  capital
without  generating  any  revenues,  and the  Company  will  continue to require
substantial and increasing  amounts of funds to conduct  necessary  research and
development, preclinical and clinical testing of its products, and to market any
products which may receive  regulatory  approval.  In January 1998 in connection
with the merger, the Company obtained:  (i) $220,000 from Vanden;  (ii) proceeds
of $825,000  from a private  placement  of  securities;  and,  (iii)  additional
liquidity for the Company's  current  operations by the conversion of $3,210,487
in debt to Series A redeemable  nonvoting  Preferred  Stock.  In July 1998,  the
Company sold in a private offering 250,500 shares of convertible preferred stock
for gross proceeds of $1,252,500.  (See Management's  Discussion and Analysis or
Plan of  Operations,  and  Description  of  Securities.)  The  Company  may seek
additional funds within the next 10 to 12 months to fund continuing research and
development  costs. If the Company should require  additional funding within the
next 10 to 12 months,  the Company  believes that it will be able to obtain such
financing.  The Company  anticipates that additional funding of up to $7,000,000
will be required over the following three years to successfully complete the FDA
approval  process.  The Company's  ability to meet its cash  obligations as they
become due and payable in the  subsequent  fiscal year is expected to depend for
at least the next  several  years on its  ability to obtain  equity  and/or debt
capital.
    
         The  Company  is  contractually  obligated  to  pay a  royalty  in  the
aggregate of  approximately  one to three percent (1% to 3%) of gross revenue to
certain  persons  pursuant  to  separate  agreements  of  dissolution  among the
partners of a  partnership.  Under a separate  agreement  entered  into with six
limited  partners and heirs of limited  partners who own in the aggregate 64.28%
of the limited  partnership,  the Company is obligated to pay a bonus payment in
the aggregate of $96,420 at the time the Company is reimbursed by a drug company
for past expenses paid for  development of the medicine,  as well as 64.28% of a
decreasing  payment rate (3% to 1%) on cumulative  annual royalties  received by
the Company. No liability has been accrued with respect to this agreement.

         In a separate  agreement,  the  Company  has agreed to pay two  limited
partners owning the remaining 35.72% interest in the limited partnership, 35.72%
of a decreasing earned payment (3% to 1%) on cumulative annual sales of products
by the Company until  October 10, 2004.  From October 10, 2004 until October 10,
2014,  the  Company  will pay the  partners  17.86% of the earned  payment.  The
Company also agreed to pay the former  limited  partners an aggregate of $40,000

                                      -4-
<PAGE>

and a combined minimum earned payment of $3,572 per calendar  quarter  beginning
December 1, 1989.  The  minimum  earned  payment is payable  when the Company is
either  reimbursed for expenses paid for the development of the medicine or from
the first  income  received by the Company from net sales of the  medicine.  The
Company has accrued the liability  regarding  the minimum  earned  payment.  The
Company  will  receive a credit  against the earned  payments  for 50% of monies
which  are  expended  in  connection  with  preparing,  filing,  obtaining,  and
maintaining patents involved with the sold rights.

         In addition,  the Company has entered  into an  agreement  with Western
Center for Clinical Studies, Inc. ("WCCS"), whereby WCCS will assist the Company
in obtaining FDA approval for its product,  Esterom(R),  implementing a business
plan   and   providing    experienced   personnel   to   bring   Esterom(R)   to
commercialization,  in exchange for a management fee of $880,400 to be paid over
the 33 month term of the agreement, as well as provide stock options to purchase
450,000  shares of the  Company's  Common  Stock over the 33 month  period at an
exercise price of $1.50 per share.  The Company intends to use the proceeds from
the private  placement of its Series B convertible  preferred  stock to meet its
monthly payment obligation to WCCS. The payment  obligation  commenced in April,
1998.

         There  can be no  assurance  that the  Company  will be  successful  in
raising funds necessary to bring Esterom(R) to market.  Additional funds will be
sought,  most likely  through  sale of equity or debt  securities,  which can be
expected to result in substantial dilution to existing  shareholders,  including
purchasers of the Shares. The Company may also seek funds through  collaborative
arrangements with strategic partners or others.  Such arrangements could require
relinquishment of rights to certain  technologies,  products or markets which it
would not otherwise relinquish. If adequate funds are not available, the Company
will delay and may be unable to complete  Phase III testing.  See Risk Factors -
"Substantial  Capital  Needs,  Management's  Discussion  and Analysis or Plan of
Operations, and The Company.

EARLY STAGE OF PRODUCT DEVELOPMENT; SUBSTANTIAL OPERATING LOSSES
   
         The Company has not yet generated any operating  revenues.  The Company
cannot predict when marketing approval for Esterom(R) will be obtained, if ever.
Even if such  approval is obtained,  there can be no assurance  that  Esterom(R)
will be successfully marketed. The Company has experienced significant operating
losses due to substantial  expenses  incurred to acquire and fund development of
the product and, as of June 30, 1998, had an accumulated  deficit of $5,515,015.
The Company  expects its  operating  expenses to increase  over the next several
years as it funds  development,  clinical  testing and other expenses of seeking
FDA approval.  The Company's  ability to achieve a profitable level of operation
is dependent in large part on obtaining  regulatory approvals for Esterom(R) and
any subsequent  products,  entering into agreements for product  development and
commercialization, and expanding from development into successful marketing, all
of which will require significant amounts of capital. There can be no assurance

                                      -5-
<PAGE>

that the  Company  will  ever  achieve a  profitable  level of  operations.  See
Management's Discussion and Analysis or Plan of Operations.
    
POSSIBLE INABILITY TO MEET CASH OBLIGATIONS

         The Company may experience cash flow difficulties from time to time due
to its  substantial  capital needs.  For the foreseeable  future,  the Company's
ability to meet its  obligations  as they become due and payable  will depend on
its ability to obtain debt and/or equity funding.  In the event that the Company
cannot raise sufficient capital when needed to sustain or expand its operations,
the Company would likely suspend research and development  activities.  See Risk
Factors - "Substantial  Capital Needs , Management's  Discussion and Analysis or
Plan of Operations, and The Company.

DEPENDENCE ON ONE PRODUCT AND FDA APPROVAL

         The  Company's  principal  development  efforts  are  centered  on  the
development of a new drug,  Esterom(R),  which management believes shows promise
for the treatment of impaired range of motion  associated  with acute lower back
sprain and acute painful  shoulder.  While limited clinical trials of Esterom(R)
have to date  produced  favorable  results,  significant  additional  trials are
required,  and no  assurance  can be  given  that the drug  will  ultimately  be
approved  by the FDA.  The  Company  intends  to  develop  additional  products;
however,  the Company has not  identified any other  potential  products at this
time and there can be no assurance that any  additional  drugs will be developed
or approved for marketing by the FDA. The Company has never introduced a product
for sale to the public,  and no  assurance  can be given that  marketing  of the
Company's product in any country in which it may be approved will be financially
successful,  which  could  materially  adversely  effect  the  Company.  See The
Company.

TECHNOLOGICAL CHANGE AND COMPETITION

         The pharmaceutical industry is characterized by intense competition and
is subject to rapid and significant  technological  change.  Rapid technological
development may cause the products to become obsolete before the Company recoups
all or any portion of the related expenses.  The Company's  competitors  include
major pharmaceutical  companies,  biotechnology firms and universities and other
research institutions,  both in the United States and abroad, which are actively
engaged in research and development of products in the  therapeutic  areas being
pursued by the Company.  Most of the Company's  competitors  have  substantially
greater  financial,  technical,  manufacturing,  marketing  and  human  resource
capabilities than the Company.  In addition,  many of the Company's  competitors
have  significantly  greater  experience in testing new or improved  therapeutic
products  and  obtaining  regulatory  approvals of  products.  Accordingly,  the
Company's  competitors may succeed in obtaining regulatory approval for products
more rapidly than the Company. If the Company commences  significant  commercial
sales of its products,  it will also be competing with respect to  manufacturing
efficiencies  and  marketing   capabilities,   areas  in  which  it  has  little
experience. See The Company - Competition.


                                       -6-
<PAGE>

GOVERNMENT REGULATION AND PRODUCT APPROVALS

         The research,  preclinical development,  clinical trial, manufacturing,
marketing  and sale of  pharmaceuticals  are subject to extensive  regulation by
governmental authorities.  Products which may be developed by the Company cannot
be  marketed  commercially  in any  jurisdiction  in  which  they  have not been
approved.  In  the  United  States,  pharmaceuticals  are  subject  to  rigorous
regulation   by  the  U.S.  Food  and  Drug   Administration   ("FDA")  via  the
Investigational  New Drug Application  ("IND") and New Drug Application  ("NDA")
approval  process for  bringing  new drug  products to the market.  In addition,
certain  pharmaceuticals  are subject to review by the Drug  Enforcement  Agency
(DEA) to determine the status as a controlled substance.  The Federal Food, Drug
and Cosmetic Act, the regulations promulgated thereunder,  and other federal and
state  statutes  and  regulations  govern,  among  other  things,  the  testing,
manufacture, labeling, storage, record keeping, advertising and promotion of the
Company's potential products.

          The process of obtaining regulatory approvals is lengthy and extremely
expensive.  Approval by U.S.  authorities  does not guarantee,  nor  necessarily
facilitate  or  expedite,  approval  in  other  countries.  Further,  government
regulations  are subject to change and it is possible that  additional  criteria
may be established or imposed which could prevent or delay  regulatory  approval
of  Esterom(R)  or any  subsequent  products of the  Company.  See The Company -
Governmental Regulations.

         The  Company's  product,  Esterom,  contains  chemicals  derived from a
substance that is considered to have abuse potential and therefore, is currently
classified as a controlled substance by the DEA. However, no evidence of central
nervous  or  cardiovascular  systems  stimulation  were  noted  in Phase I or II
trials.  The Company has submitted a petition to the DEA to delist or reclassify
Esterom from its current Schedule II status, based on the data obtained in Phase
I and II clinical  studies in human  beings  which  provides  evidence  that the
product does not have abuse potential and therefore, does not warrant scheduling
as a controlled  substance.  The petition is currently  under review by the U.S.
Attorney  General to determine if it is possible to approve the petition without
violating  U.S.  laws or U.S.  international  treaty  obligations.  A change  in
controlled substance schedule would require FDA concurrence which is unlikely to
be given  before the product is approved  for  marketing.  In the event that the
Company's product is not reclassified,  the extra  requirements of prescribing a
drug product in this category may decrease its sales and  profitability  to some
extent.  However,  the Company  believes that the  restrictions on the number of
doses and refills placed on Schedule II status drugs will not present a material
risk for the Company because Esterom(R) has been demonstrated in a double-blind,
placebo  controlled  Phase II study of back  sprains  and  strains  and  certain
shoulder  injuries to be effective after only two doses. It may also be possible
for orthopedic  surgeons and sports medicine  physicians to apply  Esterom(R) in
their  office,  bypassing  the need of the patient to take a  prescription  to a
pharmacy for filling. See The Company- Governmental Regulations, DEA Status.

                                       -7-

<PAGE>

DEPENDENCE ON AGREEMENT WITH WESTERN CENTER FOR CLINICAL STUDIES, INC.

         The Company has entered into an agreement  with the Western  Center for
Clinical  Studies,  Inc.  ("WCCS"),  a  California  corporation  experienced  in
providing  assistance  to  companies  in the  process  of taking  pharmaceutical
products  through the FDA approval process (the  "Agreement").  The Company will
rely on WCCS for its  expertise in assisting  the Company to obtain FDA approval
for its product,  Esterom(R), in exchange for a management fee of $880,400 to be
paid over the 33 month term of the Agreement,  as well as grant stock options to
WCCS  within  thirty  days after  execution  of the  Agreement  to  purchase  an
aggregate of 450,000 shares of Entropin  common stock,  exercisable for a period
of five years from date of vesting at an exercise  price of $1.50 per share.  In
the event that the Company can not pay the financial obligations required by the
Agreement,  the Company  would be forced to terminate the Agreement by giving 60
days' notice, and make a cash payment to WCCS in the amount of three (3) months'
management  fees,  or $76,400.  The loss of the services  provided by WCCS would
adversely  affect the  Company's  ability to obtain  timely FDA  approval on its
product,  Esterom,  and the Company would likely  suspend  further  research and
development  activities.  See  Risk  Factors  -  "Substantial  Capital  Needs  ,
Management's Discussion and Analysis or Plan of Operations, and The Company.

DEPENDENCE ON MANUFACTURER AGREEMENT

         In January  1997,  the  Company  entered  into  Development  and Supply
Agreements with Mallinckrodt,  Inc.  ("Mallinckrodt") for ten (10) year terms to
develop all of the  chemistry,  manufacturing  and controls  necessary to comply
with the bulk drug master file requirements of the FDA. If the Company must seek
an  alternative  manufacturer  of its  product and is unable to obtain or retain
third party  manufacturing on commercially  acceptable terms, it may not be able
to  commercialize   pharmaceutical  products  as  planned.  Moreover,   contract
manufacturers that the Company may use must adhere to current Good Manufacturing
Practices  ("GMP")  which  are  regulations  enforced  by the  FDA  through  its
facilities  inspection program.  These facilities must pass a pre-approval plant
inspection  before the FDA will issue an  approval  to market the  product.  The
Company's  dependence upon third parties for the  manufacture of  pharmaceutical
products may adversely  affect the Company's  profit  margins and its ability to
develop and deliver  pharmaceutical  products on a timely and competitive basis.
See Management's Discussion and Analysis or Plan of Operations,  and The Company
- - Proposed Manufacturing Plans.

DEPENDENCE ON SOLE-SOURCE SUPPLIER

         In January  1997,  the Company  entered  into a Supply  Agreement  with
Mallinckrodt,  Inc.  ("Mallinckrodt")  for a ten (10) year  term to  supply  the
cocaine  essential  to  its  product.  The  Company  will  rely  exclusively  on
Mallinckrodt  as the sole supplier of the bulk active  product in North America.
Therefore,  Mallinckrodt  is  currently  the sole  source  for  cocaine  and for
manufacturing the Company's product, Esterom(R). For the year ended December 31,
1997,  the  contract  price of the  ingredient  was fixed based on the number of
liters ordered by the Company.  In subsequent  years, the cost per liter will be
adjusted  based on changes  in the price of the  components  in the bulk  active
product.

                                       -8-

<PAGE>

          If the Company is unable to obtain a sufficient  supply of the product
from  Mallinckrodt  or such supplies are delayed,  the Company could  experience
significant  delays in bringing the product to market as well as delays in human
clinical  testing  schedules  and  delays  in  submissions  of the  product  for
regulatory approval and initiation of further development progress, any of which
could have a material  adverse  effect on the Company's  business and results of
operations. In addition, if the Company must seek an alternative supplier and is
unable to obtain or retain third party manufacturing on commercially  acceptable
terms, it may not be able to commercialize  pharmaceutical  products as planned.
See Management's Discussion and Analysis or Plan of Operations,  and The Company
- - Proposed Manufacturing Plans.

DEPENDENCE ON THIRD PARTIES TO MARKET THE COMPANY'S PRODUCT

         The Company does not intend to manufacture any pharmaceutical products.
The Company  believes that its strategy for  outsourcing  manufacturing  is cost
effective  since it avoids the high fixed  costs of plant,  equipment  and large
manufacturing  staff, and thereby enables the Company to conserve its resources.
However,  there can be no assurance  that the Company would be able to outsource
manufacture any of such products  successfully and in a  cost-effective  manner.
The  Company  will  seek to  identify  and  propose  strategic  partners  and/or
distributors for the Company's  product.  If the Company should encounter delays
or  difficulties  in  establishing  relationships  with  drug  manufacturers  to
produce,  package and distribute its finished  pharmaceutical  products,  market
introduction and subsequent sales of such products would be adversely  affected.
See The Company.

DEPENDENCE ON OFFICERS AND FUTURE EMPLOYEES

         The Company is dependent on its officers and  directors.  The following
officers of the Company are also officers of WCCS, a  subcontractor  employed to
assist the Company in obtaining  FDA  approval  for its product,  and will serve
only during the term of the WCCS  contract  (33  months):  President,  Daniel L.
Azarnoff,  M.D.;  Vice  President of  Science/Regulatory  Affairs,  Lois Rezler,
Ph.D.;  and,  Chief  Operating  Officer,  Roy S.  Azarnoff,  Ph.D.  If the  WCCS
agreement is  terminated  for any reason prior to the  Company's  obtaining  FDA
approval of its product, the loss of services by any of the above officers would
adversely  affect the  management  of the Company.  In addition,  if the Company
fails to retain the services of its Chief  Executive  Officer or Chief Financial
Officer, the Company's operations would be adversely affected.  The Company does
not have key man insurance on any of its officers or directors. See Management.

MANAGEMENT OF GROWTH

         The Company's  ability to manage its growth, if any, will require it to
continue to improve and expand its management, operational and financial systems
and  controls.   If  the  Company's   management  is  unable  to  manage  growth
effectively,  the Company's business and results of operations will be adversely
affected. See The Company and Management.

                                       -9-

<PAGE>

TECHNOLOGICAL UNCERTAINTIES

         All of  the  Company's  product  development  efforts  are  based  upon
technologies  and  therapeutic  approaches  that have not been widely  tested or
used.  There is,  therefore,  a significant  risk that these approaches will not
prove to be successful.  While the Company believes that the results obtained to
date in preclinical and limited  clinical  studies support further  research and
development,  those results are not necessarily  indicative of results that will
be obtained in further human clinical testing. See The Company.

PHARMACEUTICAL PRICING; PENDING HEALTH CARE REFORMS

         Government  health  administration  authorities,  together with private
health  insurers,  increasingly  are  attempting to contain health care costs by
limiting the price or reimbursement levels for medical products and services. In
certain   foreign   markets,    pricing   or   profitability   of   prescriptive
pharmaceuticals is subject to government  control.  In the United States,  there
have  been a  number  of  federal  and  state  proposals  to  implement  similar
government controls or otherwise  significantly  reform the existing health care
system.  Due to uncertainties  as to the ultimate  features of this or any other
reform  initiatives  that may be enacted,  the Company cannot predict which,  if
any, of such reform proposals will be adopted, when they may be adopted, or what
impact they may have on the Company.  It is possible that any legislation  which
is enacted  will  include  provisions  resulting  in price  limits,  utilization
controls or other  consequences  that may adversely affect the Company.  See The
Company - Governmental Regulations.

PATENTS AND PROPRIETARY RIGHTS

         Although the Company has been issued certain patents, patents are not a
guarantee of protection from competitors, especially in an area characterized by
rapid advances.  Enforcement of patents and proprietary rights in many countries
can be expected to be  problematic or  unpredictable.  There can be no assurance
that any  patents  issued or licensed  to the  Company  will not be  challenged,
invalidated,  infringed  upon,  or designed  around by others or that the claims
contained  in such  patents  will not  infringe  the  patent  claims of  others.
Furthermore,  there  can be no  assurance  that  others  will not  independently
develop  similar  products.  Although  management  believes that patents provide
significant  protection for the Company's product, the Company's business may be
adversely  affected  by  competitors  who  develop  a  substantially  equivalent
product. Patent litigation can be extremely expensive,  and the Company may find
that it is unable to fund  litigation  necessary  to defend its rights.  See The
Company - Patent.

PRODUCT LIABILITY; LACK OF INSURANCE

         The Company's  business will expose it to potential  product  liability
risks which are inherent in the testing,  manufacturing,  marketing  and sale of
pharmaceutical  products,  and product  liability claims may be asserted against
the  Company.  Product  liability  insurance  for  the  pharmaceutical  industry
generally  is  expensive.  The  Company  intends  to  obtain  product  liability
insurance prior to the commencement of Phase III clinical studies.  There can be

                                      -10-
<PAGE>

no assurance  that adequate  insurance  coverage will be available at acceptable
costs, or that a product liability claim would not adversely affect the business
or financial condition of the Company.

AUTHORIZED STOCK AVAILABLE FOR ISSUANCE BY THE COMPANY
   
         There are  presently  outstanding  6,000,051  shares  out of a total of
50,000,000 shares of Common Stock,  $.001 par value. There are 10,000,000 shares
of Preferred  Stock  authorized  for issuance  under the  Company's  Articles of
Incorporation:  3,210,487  shares have been  designated  as Series A  redeemable
nonvoting  Preferred Stock, $.001 par value, and are all issued and outstanding;
400,000  have  been  designated  as  Series  B  convertible   Preferred   Stock,
convertible  on a 1 for 1 basis into Common Stock of which  250,500  shares have
been issued and are  outstanding.  The  remaining  shares of Common Stock and/or
Preferred  Stock not issued or  reserved  for  specific  purposes  may be issued
without  any action or  approval of the  Company's  shareholders.  To the extent
persons holding the Company's  options exercise their options and receive shares
of Common Stock, the number of shares of Common Stock outstanding will increase;
however,  there can be no assurance that any of the option holders will exercise
their options. Other than the option exercise,  management has no present plans,
agreements  or  undertakings  involving  the  issuance of such shares  except as
disclosed in this  Prospectus.  Any such issuances  could be used as a method of
discouraging, delaying or preventing a change in control of the Company or could
dilute the  shareholders'  ownership of the  Company.  There can be no assurance
that  management  will  not  undertake  to  issue  such  shares  if it  deems it
appropriate to do so. See Description of Securities.
    

ANTI-TAKEOVER PROVISIONS

         The Company's  Board of Directors can,  without  obtaining  shareholder
approval,  issue shares of Preferred  Stock having  rights that could  adversely
affect the voting power of the Common Stock. The possible  issuance of shares of
Preferred Stock can be used to oppose hostile takeover attempts.
See Description of Securities.

POSSIBLE VOLATILITY OF PRICE OF SHARES OF COMMON STOCK

         The  prices of  securities  of  publicly  traded  corporations  tend to
fluctuate  widely.  It  can be  expected,  therefore,  that  there  may be  wide
fluctuations in the price of the Company's Common Stock. A public market for the
Common Stock has  developed  only  recently  and there is no assurance  that the
market in the Common  Stock will be  sustained.  The  Company's  Common Stock is
traded on the  Electronic  Bulletin  Board  under  the  trading  symbol  "ETOP".
Fluctuations in trading interest and changes in the Company's operating results,
financial  condition and prospects could have a significant impact on the market
prices for the Common Stock.  See Market for Common Equity,  Dividend Policy and
Related Shareholder Matters.

Lack of Dividends

         The Company has never paid any cash  dividends  on its Common Stock and
does not  anticipate  paying  dividends  in the  foreseeable  future.  No person
seeking  dividend  income from an  investment  should  purchase  Shares  offered

                                      -11-
<PAGE>

hereby.  The Company is  obligated  to pay  dividends on its Series A redeemable
nonvoting  Preferred  Stock;  however,  the  obligation  is  non-cumulative.  In
addition,  the Company is obligated to pay an annual dividend equivalent to $.50
per share  for each  outstanding  share of its  convertible  Series B  Preferred
Stock;  the obligation is cumulative  and, at the Company's  discretion,  may be
paid in cash or Common Stock. See Description of Securities.

INDEMNIFICATION AND LIMITED MONETARY DAMAGES

         The Company's Amended Articles of Incorporation  limit the liability of
the  directors to  shareholders  for monetary  damages for breach of a fiduciary
duty except in cases of  liability  for: (i) any breach of their duty of loyalty
to the Company or its shareholders;  (ii) acts or omissions not in good faith or
which  involve  intentional  misconduct  or a knowing  violation  of law;  (iii)
certain  unlawful  distributions;  or, (iv)  transaction from which the director
derived an improper  personal benefit.  Shareholders  cannot recover in full for
improper acts of the Board and its members.

SHARES  ELIGIBLE FOR FUTURE  SALE;  POSSIBLE  ADVERSE  EFFECT ON PRICE OF COMMON
STOCK

         Future sales of Common Stock by current shareholders and option holders
could adversely  affect the market price of the Company's  Common Stock.  All of
the Shares  registered  hereunder  can be resold  pursuant  to this  Prospectus.
However,  the  Company has  entered  into an  agreement  with its  officers  and
directors and major  shareholders  pursuant to which  4,748,388  Shares owned by
such persons, including all shares held by the Company's officers and directirs,
may be sold only as the  Company  may  permit  for a period of one year from the
date of this Prospectus.  The Shareholders Agreement was entered in anticipation
that potential  funding sources at times may require or request a restriction on
disposition   of  securities   owned  by  a  company's   management   and  major
shareholders.  Sales of  substantial  amounts  of  Common  Stock by the  persons
subject to the Shareholders  Agreement are likely to have a depressive effect on
the market price of the Common Stock and could impair the  Company's  ability to
raise  capital  through  the sale of its equity  securities.  (See The  Company,
Selling  Security Holders and Shares Eligible for Future Sale.)

         In the event the Shares are not sold under this Prospectus,  the Shares
remain  "restricted  securities" as that term is defined in Rule 144 promulgated
under the  Securities  Act. In general,  under Rule 144, as currently in effect,
any person (or persons whose shares are aggregated), including persons deemed to
be affiliates, whose restricted securities have been fully paid for and held for
at least one year from the later of the date of payment  therefor to the Company
or acquisition  thereof from an affiliate,  may sell such securities in brokers'
transactions  or directly to market  makers,  provided that the number of shares
sold in any three  month  period may not  exceed  the  greater of 1% of the then
outstanding  Common  Stock or the average  weekly  trading  volume of the Common
Stock during the four calendar weeks  preceding such sale.  Sales under Rule 144
are also subject to certain notice  requirements and the availability of current
public  information  about the  Company.  After two years have  elapsed from the
later  of the  issuance  of  restricted  securities  by  the  Company  or  their
acquisition from an affiliate, such securities may be sold without limitation by
persons who are not affiliates under Rule 144.

         Sales of  substantial  amounts of Common Stock by  shareholders  of the
Company under Rule 144 or otherwise,  or even the potential for such sales,  are
likely to have a  depressive  effect on the market price of the Common Stock and
could  impair the  Company's  ability to raise  capital  through the sale of its
equity securities.
                                      -12-
<PAGE>

RISKS ASSOCIATED WITH FORWARD-LOOKING STATEMENTS

         This Prospectus contains certain forward-looking  statements within the
meaning of Section 27A of the  Securities  Act and Section 21E of the Securities
Exchange Act of 1934, as amended  ("Exchange Act"), and the Company intends that
such  forward-looking  statements  be  subject  to the  safe  harbors  for  such
statements under such sections. The Company's forward-looking statements include
the plans and objectives of management for future  operations,  including  plans
and objectives  relating to the Company's  planned  marketing efforts and future
economic  performance  of  the  Company.  The  forward-looking   statements  and
associated risks set forth in the Prospectus include or relate to the ability of
the Company to: (i) obtain regulatory approval for its product,  including,  but
not  limited to, the FDA;  (ii)  obtain  meaningful  consumer  acceptance  and a
successful  market  for the  product on a national  and  international  basis at
competitive  prices;  (iii)  develop and  maintain  an  effective  national  and
international sales network;  (iv) forecast demand for its product; (v) maintain
pricing and thereby maintain adequate profit margins; and, (vi) achieve adequate
intellectual property protection.

         The forward-looking statements herein are based on current expectations
that  involve  a  number  of  risks  and  uncertainties.   Such  forward-looking
statements  are based on  assumptions  that:  (i) the  Company  will  obtain the
necessary governmental and regulatory approval for its product and subsequently,
market and provide the product on a timely  basis;  (ii) the Company will obtain
equity and/or debt capital;  (iii) there will be no material adverse competitive
or technological change in condition of the Company's business;  (iv) there will
be a demand for the Company's product;  (v) the Company's  forecasts  accurately
anticipate market demand;  and, (vi) there will be no material adverse change in
the Company's  operations,  business or  governmental  regulation  affecting the
Company or its suppliers.  The foregoing assumptions are based on judgments with
respect  to,  among  other  things,  future  economic,  competitive  and  market
conditions,  and  future  business  decisions,  all of which  are  difficult  or
impossible  to predict  accurately  and many of which are  beyond the  Company's
control.  Accordingly,  although  the  Company  believes  that  the  assumptions
underlying the  forward-looking  statements are reasonable,  any such assumption
could prove to be inaccurate  and therefore  there can be no assurance  that the
results  contemplated  in  forward-looking   statements  will  be  realized.  In
addition, as disclosed elsewhere in "Risk Factors",  there are a number of other
risks inherent in the Company's  business and  operations  which could cause the
Company's  operating  results to vary markedly and adversely from prior results,
or the  results  contemplated  by  the  forward-looking  statements.  Management
decisions,  including  budgeting,  are  subjective in many respects and periodic
revisions must be made to reflect actual  conditions and business  developments,
the  impact  of which  may cause the  Company  to alter its  marketing,  capital
investment and other  expenditures,  which may also materially  adversely affect
the  Company's  results of  operations.  In light of  significant  uncertainties
inherent in forward-looking  information  included herein, the inclusion of such
information  should not be  regarded as a  representation  by the Company or any
other  person  that the  Company's  objectives  or plans will be  achieved.  See
Management's Discussion and Analysis or Plan of Operations and The Company.

                                      -13-

<PAGE>
                                 USE OF PROCEEDS

         None of the proceeds from the sale of the shares of Common Stock by the
Selling  Security  Holders  will be received by the  Company.  The Company  will
receive cash proceeds from the exercise,  if any, of  outstanding  options.  See
Selling Security Holders and Plan of Distribution.

                                 CAPITALIZATION
   
         The following table sets forth the  capitalization of the Company as of
June 30, 1998, and as adjusted to give effect to the private offering of 250,500
Shares of Series B convertible Preferred Stock.
<TABLE>
<CAPTION>
                                                                                          June 30, 1998
                                                                                          -------------
                                                                                                        Pro Forma
                                                                                    Actual             as adjusted(1)
                                                                                 -----------           --------------
<S>                                                                              <C>                    <C>
Long-term debt                                                                   $   162,639            $   162,639
Series A redeemable nonvoting preferred stock, $.001                               3,210,487              3,210,487
  par value; 3,210,487 shares, issued and outstanding

Series B convertible redeemable nonvoting preferred
 stock, $.001 par value; 250,500 shares, issued and
outstanding, as adjusted
                                                                                         -0-              1,150,000
Stockholders' equity (deficit):

Preferred stock, $.001 par value; 10,000,000 shares
  authorized, Series A and Series B outstanding
  (reported above)

Common stock, $.001 par value; 50,000,000 shares                                       6,000                  6,000
authorized, 6,000,051 shares issued and
outstanding

Additional paid-in capital                                                         5,914,210              5,914,210

Deficit accumulated during the development stage                                  (5,515,015)            (5,515,015)

Unearned Stock Compensation                                                       (3,453,863)            (3,453,863)
                                                                                 -----------            -----------

Total stockholders' equity (deficit)                                              (3,048,668)            (3,048,668)
                                                                                 -----------            -----------
Total capitalization                                                             $   324,458            $ 1,474,458
                                                                                 ===========            ===========
</TABLE>
    
- -------------------
(1)  Adjusted  to give  effect to the  private  offering  of  250,500  shares of
     convertible, non-voting Series B Preferred Stock at $5.00 per share.

                                      -14-

<PAGE>
                  MARKET FOR COMMON EQUITY, DIVIDEND POLICY AND
                           RELATED SHAREHOLDER MATTERS


         MARKET  INFORMATION.  The  Company's  securities  are not  eligible for
listing on the NASDAQ system;  however, the Company's stock commenced trading on
the  Electronic  Bulletin  Board under the trading symbol "ETOP" on February 25,
1998.  The  following  table  sets  forth  the high and low bid  prices  for the
Company's Common Stock since the Common Stock commenced  trading on February 25,
1998. The quotations reflect inter-dealer prices, with retail mark-up, mark-down
or  commissions,  and may not represent  actual  transactions.  The  information
presented has been derived from National Quotation Bureau, Inc.

            1998 Fiscal Year                     High Bid            Low Bid
            ----------------                     --------            -------

First Quarter                                     $3.375              $3.00
Second Quarter                                    $7.875              $3.25
   
Third Quarter (through August 13, 1998)           $7.50               $5.50

        On August  13,  1998,  the last  reported  bid and asked  prices for the
Common Stock were $5.75 and $6.75, respectively.
    
        DIVIDEND  POLICY.  The payment of dividends by the Company is within the
discretion  of its Board of  Directors  and  depends in part upon the  Company's
earnings, capital requirements and financial condition. Since its inception, the
Company has not paid any  dividends on its Common Stock and does not  anticipate
paying such dividends in the foreseeable  future.  The Company intends to retain
earnings, if any, to finance its operations.
   
         SHAREHOLDER  INFORMATION.  As of  August  13,  1998,  the  Company  had
approximately  217 holders of record of the  Company's  Common  Stock,  four (4)
holders of record of the  Company's  Series A Preferred  Stock and 36 holders of
record of the Company's Series B convertible Preferred Stock.
    
           MANAGEMENT'S DISCUSSION AND ANALYSIS OR PLAN OF OPERATIONS


PLAN OF OPERATIONS

        The Company is a development  stage  pharmaceutical  company and has not
generated any revenues for the period from August 27, 1984  (inception) to date.
The  Company has devoted  substantially  all its  resources  to  acquisition  of
patents,  research and development of the medicine,  and expenses related to the
startup of its business.
   
         The Company has been unprofitable  since inception and expects to incur
substantial  additional  operating losses for the next 12 months, as well as for
the next few years, as it increases expenditures on research and development and
begins to allocate  significant  and increasing  resources to clinical  testing,
marketing  and  other  activities.  As  described  below,  in 1998  the  Company
completed a private placement,  exchanged preferred stock for debt and completed

                                      -15-
<PAGE>

a reverse acquisition accounted for as a recapitalization of the Company.  These
events  have  provided   additional   liquidity  for  the  Company  for  current
operations.   The  Company  conducted  a  private  placement  of  $1,252,500  in
convertible Series B preferred stock which funds will be used to fund operations
during the next 12 months. The Company anticipates  requiring additional funding
of up to $7,000,000 over the following three years to successfully  complete the
FDA approval process.

        The Company  recently  entered into an agreement with the Western Center
for Clinical  Studies,  Inc.  (WCCS),  a California  corporation  experienced in
managing pharmaceutical development.  During the 33 month term of the agreement,
WCCS  will  assist  the  Company  in  obtaining  FDA  approval  for its  product
Esterom(R),  implementing a business plan and providing experienced personnel to
bring Esterom(R) to commercialization. The Company is required to pay management
fees of approximately $880,400 over the term of the agreement,  and has provided
stock options to purchase  450,000 shares of the Company's Common Stock over the
33 month period at an exercise price of $1.50 per share.
    
RESULTS OF OPERATIONS
   
        From inception until June 30, 1998, the Company has incurred expenses of
$4,201,082  in  research  and  development  costs,  $1,010,014  in  general  and
administrative  expenses,  $240,635 interest expenses, and other net expenses of
$63,284  resulting in a loss of $5,515,015 for the period from inception (August
27, 1984) to June 30, 1998.

         During the three months ended June 30, 1998, the Company incurred a net
loss of  $599,146,  as compared to $78,754 for the three  months  ended June 30,
1997.  The increase  resulted  primarily from an increase of $336,881 in general
and  administrative  expenses  and an  increase  of  $219,345  in  research  and
development  expenses.  Both  increases  related  primarily to  negotiating  and
initiating  the agreement  with WCCS, as well as other  start-up  organizational
expenses.

        During the six months ended June 30, 1998,  the Company  incurred a loss
of $700,840, as compared to a loss of $163,638 for the six months ended June 30,
1997.  The increase  resulted  primarily from an increase of $425,655 in general
and administrative  expenses,  relating to  recapitalization  of the Company and
negotiation of an agreement  with WCCS.  Interest  expense  decreased in 1998 by
$72,254 as a result of conversion of notes payable to redeemable preferred stock
on January 15, 1998.  Research and development  costs also increased by $185,272
as a result of commencement of the agreement with WCCS.

                                       -16-

<PAGE>

        For the year ended December 31, 1997, the Company  incurred  $877,209 in
research and development fees,  $328,853 in general and administrative  expenses
and $127,386 in interest  expense,  resulting in a loss of $1,351,448.  Research
and  development  fees incurred during 1997 were  approximately  $709,000 higher
than  in  1996.  The  increase  related  primarily  to  recording  research  and
development  expense and  contributed  capital for the  estimated  fair value of
common stock ($712,000)  contributed by certain shareholders to an individual in
exchange for research and development  services  provided since inception of the
Company.   General  and  administrative   expenses  incurred  during  1997  were
approximately  $227,000 higher than in 1996. The increase  related  primarily to
recording legal expense and contributed  capital for the estimated fair value of
common stock ($215,000) contributed by certain shareholders to an individual for
business advisory and legal services.
    
        The  Company's  activities to date are not as broad in depth or scope as
the  activities it must  undertake in the future,  and the Company's  historical
operations and financial  information are not indicative of the Company's future
operating results or financial condition or its ability to operate profitably as
a  commercial  enterprise  when and if it succeeds  in  bringing  any product to
market.

CAPITAL RESOURCES AND LIQUIDITY
   
         In the years since  inception,  the Company has financed its operations
primarily  through the sale of shares of Entropin  common and  preferred  stock,
loans  and  advances  from  shareholders.  At  December  31,  1997,  outstanding
liabilities to shareholders aggregated $1,809,360, including 8% notes payable to
shareholders in an aggregate amount of $1,710,487, including accrued interest of
$169,131,  which  notes  were  due  on  December  31,  2000.  These  notes  were
subsequently  converted  as noted  below  into  Series A  redeemable  nonvoting,
noncumulative Preferred Stock.
    
        On January 15, 1998,  the Company  issued  3,210,487  shares of Series A
redeemable  non-voting,  noncumulative  8%  preferred  stock in exchange  for an
aggregate of $3,210,487 of notes payable to  shareholders  and accrued  interest
and for various other liabilities of the Company.

        On January 15,  1998,  the Company  completed a private  placement of 30
units (each unit consisting of 10,000 shares of its $.001 par value common stock
per unit) at $27,500  per unit,  or $2.75 per  share,  which  resulted  in gross
proceeds  of  $825,000.  Concurrent  with the  private  placement,  the  Company
completed an agreement  and plan of merger with Vanden  Capital  Group,  Inc. to
exchange  all of the issued and  outstanding  common  shares of the  Company for
5,220,000  shares of  Vanden's  $.001 par value  common  stock.  Pursuant to the
agreement, Vanden provided cash of $220,000. The Company was merged into Vanden,
and Vanden  changed its name to  Entropin,  Inc.  For  accounting  purposes  the
acquisition  has been treated as a  recapitalization  of the Company  based upon
historical cost (a reverse acquisition), with the Company as the acquiror.

        In  January  1997,  the  Company  entered  into  Development  and Supply
Agreements with Mallinckrodt,  Inc.  ("Mallinckrodt") for ten (10) year terms to
develop all of the  chemistry,  manufacturing  and controls  necessary to comply
with the drug  master  file of the FDA,  as well as to  supply  the bulk  active
product.  In exchange for these services,  Mallinckrodt  will receive  exclusive
rights as a supplier of the bulk active product to the Company in North America.
For the year ended  December 31, 1997,  the contract price of the ingredient was
fixed based on the number of liters ordered by the Company. In subsequent years,
the  cost per  liter  will be  adjusted  based on  changes  in the  price of the
components in the bulk active product.

                                      -17-

<PAGE>
   
         On July 31, 1998, the Company  completed a private placement of 250,500
shares of convertible  Series B preferred stock (See Description of Securities -
Preferred  Stock)  at $5.00 per  share,  which  resulted  in gross  proceeds  of
$1,252,500. Dividends on the preferred stock will accrue at the rate of $.50 per
share  per  annum,  will be  cumulative  and will be paid  annually  in  arrears
commencing  July 15, 1998. At the Company's  election,  annual  dividends may be
paid in cash and/or in shares of the Company's  common stock valued at $5.00 per
share.
    
EFFECT OF INFLATION AND FOREIGN CURRENCY EXCHANGE

        The  Company has not  experienced  material  unfavorable  effects on its
results of operations  due to currency  exchange  fluctuations  with any foreign
suppliers or material  unfavorable  effects upon its results of  operations as a
result of domestic inflation.

YEAR 2000 ISSUE

        The  Company's  management  does not believe  that the  Company  will be
materially  adversely  affected by the computer  software  Year 2000 issue.  The
Company does not have significant exposure to the Year 2000 issue. The Company's
vendors  and  suppliers  may have some  exposure  to the issue but at this time,
management  does not  anticipate  a  material  adverse  impact on the  Company's
operations.

FORWARD LOOKING INFORMATION

        Statements  of  the  Company's  or  management's  intentions,   beliefs,
anticipations,  expectations and similar  expressions  concerning  future events
contained in this document constitute "forward looking statements" as defined in
the Private Securities  Litigation Reform Act of 1995. As with any future event,
there  can  be no  assurance  that  the  events  described  in  forward  looking
statements  made in this report will occur or that the results of future  events
will not vary materially from those described in the forward looking  statements
made in this document.  Important  factors that could cause the Company's actual
performance and operating  results to differ materially from the forward looking
statements  include,  but are not  limited to, (i) the ability of the Company to
obtain regulatory approval for its product including but not limited to the FDA,
(ii) the ability of the Company to obtain meaningful  consumer  acceptance and a
successful  market  for the  product on a national  and  international  basis at
competitive prices,  (iii) the ability of the Company to develop and maintain an
effective  national and  international  distribution  plan,  (iv) success of the
Company in forecasting demand for its product, (v) the ability of the Company to
maintain pricing and thereby maintain adequate profit margins,  (vi) the ability
of the Company to achieve adequate intellectual property protection.

                                   THE COMPANY

BACKGROUND

         Entropin,  Inc.  (the  "Company")  was  incorporated  in the  State  of
Colorado in 1987 as Vanden  Capital  Group,  Inc.,  for the  primary  purpose of
providing business and management  advisory services.  The Company also had been
considering  business  acquisitions.  On  January  15,  1998,  the  Company  and
Entropin,  Inc., a  California  corporation,  ("Old  Entropin")  consummated  an
Agreement  and Plan of Merger ( the  "Merger  Agreement"),  whereby  the Company
acquired all of the issued and  outstanding  shares of Old Entropin common stock
which  consisted of 5,700,001  shares of common  stock and  3,210,487  shares of
Series A redeemable  non-voting  preferred stock in exchange for the issuance of

                                      -18-
<PAGE>

5,700,001  shares of the Company's Common Stock and 3,210,487 shares of Series A
redeemable  non-voting  preferred  stock.  In  connection  with the Merger,  the
Company  changed  its name to  Entropin,  Inc.  and  succeeded  to the  business
activity  of Old  Entropin.  The terms and  conditions  of the Merger  Agreement
obligate the Company to register all of the Shares of the Company's Common Stock
issued to shareholders of Old Entropin  following the consummation of the Merger
Agreement.

         The  Company  has  entered  into an  agreement  with its  officers  and
directors and major  shareholders  pursuant to which  4,748,388  Shares owned by
such persons may be sold only as the Company may permit for a period of one year
from the date of this  Prospectus.  The  Shareholders  Agreement  was entered in
anticipation  that potential  funding  sources at times may require or request a
restriction  on disposition  of securities  owned by a company's  management and
major shareholders.  See Selling Security Holders and Shares Eligible for Future
Sale.

        The Company is currently engaged in pharmaceutical  research and will be
developing a patented  medicinal  preparation  known as Esterom(R) for potential
sale to the  public.  The  Company is the  beneficiary  of more than 19 years of
extensive  research and  development  with  respect to the product,  Esterom(R),
undertaken  by Lowell M. Somers,  MD, the inventor of the product,  and James E.
Wynn,  Ph.D.,  the Company's  scientific  advisor.  The present  formulation  of
Esterom(R)  is based on early  chemical and clinical  studies  performed by Drs.
Somers and Wynn, in conjunction with other doctors.

        The Company is currently  pursuing approval of the product with the U.S.
Food and Drug  Administration  ("FDA").  Esterom(R)  is a medicinal  preparation
formulated for the treatment of impaired range of motion  associated  with acute
lower back sprain and acute  painful  shoulder.  The  Company has been  assigned
seven patents issued by the U.S.  Patent  Office.  The Company has a current and
open  Investigational  New Drug  ("IND") file with the FDA and is in Phase II of
the approval process.

        The two  indications  tested with the topical  application of Esterom(R)
were acute lower back sprain and acute painful shoulder.  The range of motion of
each condition was improved  significantly when compared with patients receiving
a placebo.  The Company  believes that these two  conditions  affect about sixty
million Americans each year and represent a substantial  domestic market.  There
is no estimate  available for the size of the international  market,  which also
appears to have potential.  Additional markets being considered are the domestic
and international veterinary market.

THE PRODUCT - ESTEROM(R)

        Dr. Somers originally discovered Esterom(R), a medicinal preparation, in
1979. The product name is derived from its chemical identity and medical purpose
since  it is an ester  that  improves  the  range of  motion  (ROM) of  patients
suffering from a painful shoulder or back sprain/strain.

         In 1979, Drs. Somers and Wynn initiated a collaborative effort to study
the chemical  composition  of Esterom(R)  and its clinical  effects which effort
continues  today under the  Company's  aegis.  As Chairman of the  Department of
Pharmaceutical  Sciences,  College  of  Pharmacy,  Medical  University  of South

                                      -19-
<PAGE>

Carolina,  Dr. Wynn  developed a  manufacturing  method that  produced a product
which could satisfy FDA  requirements  for testing  purposes.  The  reproducible
hydrolytic  process that Dr. Wynn  developed  led to the  discovery of three new
molecules in 1993.  The three newly  discovered  molecules  are a novel class of
benzoylecgonine ("BE"), ecgonine ("EC") and ecgonidine derivatives.

GOVERNMENTAL REGULATIONS

        GENERAL.  The  manufacturing  and  marketing of the  Company's  proposed
products and its research and development activities are and will continue to be
subject to regulation by federal,  state and local  governmental  authorities in
the United States and other countries. In the United States, pharmaceuticals are
subject to  rigorous  regulation  by the FDA's  Center for Drug  Evaluation  and
Research,  which reviews and approves marketing of drugs. The Federal Food, Drug
and Cosmetic Act, the regulations promulgated thereunder,  and other federal and
state  statutes  and  regulations  govern,  among  other  things,  the  testing,
manufacture, labeling, storage, record keeping, advertising and promotion of the
Company's potential products. Since the Company's product, Esterom(R),  contains
chemicals that are derived from a substance that has abuse  potential,  the Drug
Enforcement Agency (DEA) in conjunction with the FDA will determine Esterom(R)'s
level of scheduling as a controlled substance.

        APPROVAL  PROCESS.  The process of obtaining FDA approval for a new drug
takes  several  years and  generally  involves the  expenditure  of  substantial
resources. The steps required before a new drug can be produced and marketed for
human use include  clinical trials and the approval of the New Drug  Application
("NDA").

        PRE-CLINICAL  TESTING. The compound is subjected to extensive laboratory
and animal testing to determine if the compound is biologically safe and has the
functionality  for which its  therapeutic  use is  intended.  All animal  safety
studies must be performed under current good laboratory practices ("GLP").

        INVESTIGATIONAL  NEW DRUG (IND).  Before human tests can begin, the drug
sponsor must file an IND application  with the FDA, showing how the drug is made
and the results of animal  testing.  If the FDA does not reject the  application
within 30 days, IND status permits the sponsor to undertake  initial  studies in
human volunteer subjects.

         HUMAN  TESTING  (CLINICAL).  Under an IND, the human  clinical  testing
program involves three phases.  Clinical trials are conducted in accordance with
protocols that detail the objectives of the study,  the parameters to be used to
monitor safety and the efficacy criteria to be evaluated,  including the type of
statistical analysis that will be done. Each protocol is submitted to the FDA as
part of the IND filing. At the present time, two well-controlled clinical trials
are required to establish  efficacy.  Each clinical study is conducted under the
auspices  of  an  independent   Institutional  Review  Board  ("IRB")  for  each
institution at which the study will be conducted.  The IRB will consider,  among

                                      -20-
<PAGE>

other things,  information on the product,  ethical  factors,  the risk to human
subjects, and the potential benefits of therapy relative to risk.

        In Phase I clinical  trials,  studies  usually are  conducted on healthy
volunteers  to  determine  the  maximum  tolerated  dose,   adverse  events  and
pharmacokinetics of a product.  Efficacy endpoints,  even if surrogate measures,
are also obtained if possible. Phase II studies are conducted on a statistically
relevant  number of  patients  having a specific  disease to  determine  initial
efficacy in humans for a specific  disease,  and  possible  adverse  effects and
safety  risks.  Phase  III  normally  involves  the  pivotal  trials  of a drug,
consisting of wide-scale studies on patients with the disease for which the drug
is intended, in order to evaluate the overall benefits and risks of the drug for
the treated  disease.  In addition to a placebo,  these  studies may compare the
Company's  drug  product  with  other  available  products.  Phase I, II and III
studies  are planned to  demonstrate  safety and  efficacy  as required  for FDA
approval.  The FDA continually  reviews the clinical trial plans and results and
may  suggest  design  changes  or may  discontinue  the  trials  at any  time if
significant safety or other issues arise.

        NEW DRUG  APPLICATION  (NDA).  Upon  completion  of Phase III,  the drug
sponsor may file an NDA containing all pre-clinical, pharmacology and toxicology
information,  and  clinical  and  chemical,  manufacturing  and control  ("CMC")
information  that has been gathered,  as well as all other  information  that is
known from any other sources.  The information must include  essentially all the
data   collected   during   the  IND  phase   (e.g.   chemical   structure   and
characterization  of the drug, formula and manufacturing  process,  stability in
the proposed  packaging,  animal and  laboratory  studies,  results of all human
tests,  etc.) and  proposed  labeling.  Once  submitted,  the FDA has 90 days to
accept the application. If the application is accepted, the Company must pay the
FDA  approximately  $200,000 as a user fee in order to continue  with the review
process.

         APPROVAL.  Once a NDA is approved, the manufacturer is required to keep
the FDA  informed  at all  times  regarding  any  adverse  reactions.  Moreover,
contract  manufacturers  that the  Company  may use must  adhere at all times to
current Good  Manufacturing  Practices ("GMP")  regulations  enforced by the FDA
through its facilities  inspection  program.  These  facilities must pass a pre-
approval plant inspection before the FDA will issue a pre-market approval of the
product. The FDA may also require  post-marketing  testing (Phase IV) to support
the  conclusion  of  efficacy  and  safety of the  product,  which  can  involve
significant  expense.  After FDA approval is obtained  for initial  indications,
further  clinical  trials  are  necessary  to gain  approval  for the use of the
product for additional indications.

         The testing and approval process is likely to require  substantial time
and effort,  and there can be no assurance that any FDA approval will be granted
on a timely  basis,  if at all. The approval  process is affected by a number of
factors,  primarily the adverse effects of the drug (safety) and its therapeutic
benefits (efficacy).  Additional  preclinical or clinical trials may be required
during the FDA  review  period and may delay  marketing  approval.  A task force
established by the FDA has recently proposed  significant changes in the design,
analysis and reporting of clinical studies  conducted under INDs, in response to
the  results of a Phase III trial of a drug by another  company in which  severe
complications  and  death  occurred.   The  task  force  recommended   increased
requirements  for reporting  adverse  effects and new, more stringent rules that
would require clinical trial investigators to assume that toxicities reported by

                                      -21-
<PAGE>

patients are drug-related.  If these recommendations are implemented, the length
of time and costs  associated  with  obtaining  market  approval  by the FDA are
likely to be significantly increased.

        Outside  the  United  States,  the  Company  will be  subject to foreign
regulatory  requirements  governing human clinical trials and marketing approval
for its products.  The  requirements  governing the conduct of clinical  trials,
product  licensing,  pricing and  reimbursements  vary  widely  from  country to
country.

FDA STATUS/CONTINUING RESEARCH AND DEVELOPMENT

        IND Application. Drs. Somers and Wynn filed the IND application on March
9, 1987. The results of four pre-clinical animal studies with no toxicity noted,
were incorporated within the IND Application for FDA approval.

         HUMAN  TESTING.  The Phase I Clinical  Study  involving 24 healthy male
subjects, was concluded with little or no toxicity observed.

        Since Esterom(R) maintained a clear toxicity profile and was shown to be
safe in both animals and in healthy male volunteers when applied topically,  the
FDA  approved a protocol  for a Phase II Clinical  Study.  The Phase II clinical
study  involved a  double-blind,  randomized,  placebo-controlled  investigation
designed to continue to look for adverse  effects and to determine  the efficacy
of Esterom(R) as compared to a placebo in patients who have an impaired range of
motion  resulting from acute lower back sprain and acute painful  shoulder.  The
Phase  II  Clinical  Study  involved  97  patients,  each of whom  received  two
applications  of  Esterom(R)  or  placebo,  with the  second  application  being
performed 24 hours after the first. Overall,  Esterom(R) provided relief in both
the back and shoulders which was sustained for at least seven days. There was no
clinically  observed local anesthetic or analgesic  effect.  The range of motion
for each  condition  was improved  significantly  when  compared  with  patients
receiving  a  placebo.  Range of motion for the  shoulder  may be defined as the
number of degrees to which the  patient may move the arm away from the side in a
forward, backward or upward direction.


        The Company has designed  the Phase III  Protocol and must  complete the
Phase III studies prior to completion  of the New Drug  Application  required by
the FDA for final approval of a new prescription drug. As currently planned, the
Phase III studies  will  include  multiple  trials in a number of clinical  site
study centers in differing  geographic areas of the U.S., with approximately 300
patients involved in the study. . The final study design may change according to
possible  new  FDA   requirements.   The  studies  will  be   double-blind   and
placebo-controlled.

                                      -22-

<PAGE>

        The Company  recently  entered into an agreement with the Western Center
for Clinical Studies ("WCCS"), a California corporation  experienced in managing
pharmaceuticals  which  are at an  early  stage  of  development  and  providing
assistance to companies in the process of taking pharmaceutical  products to the
FDA and  through  the IND and NDA  stages of  development  in a timely and cost-
efficient manner.  WCCS has developed a business plan to accomplish the scope of
its work and will assist the Company in implementing  its overall business plan.
In addition, WCCS will provide additional experienced management with the intent
of assisting the Company in developing its product, Esterom(R), to be able to be
used  commercially.  WCCS will  arrange  for and oversee  necessary  studies and
clinical trials of Esterom(R),  appoint and utilize the services of a Scientific
and Medical Advisory Board for the Company,  assist in developing a distribution
plan, and identify and propose  strategic  partners and/or  distributors for the
Company's product.  All work performed by WCCS will be provided by employees and
consultants of WCCS, as the Company's  subcontractor.  It is estimated that WCCS
will complete the scope of its project  within 33 months,  commencing  April 18,
1998.

        Through Phase II, all CMC work was  performed at the Medical  University
of South  Carolina's  Pharmaceutical  Development  Center,  College of Pharmacy.
Mallinckrodt,  Inc.  ("Mallinckrodt"),  a leading  manufacturer of chemicals and
drugs has  agreed to  continue  to  develop  Esterom(R)  to meet all FDA and GMP
requirements, develop a Drug Master File, file all appropriate CMC documentation
with the FDA,  supply Phase III clinical study  material,  and  manufacture  the
product  to be used  commercially.  WCCS  will  advise  the  Company  concerning
appropriate monitoring procedures to manage the Company's manufacturing contract
with  Mallinckrodt and seek  alternative  companies which have the capability of
manufacturing  the  Company's  product,  in an effort to minimize any  potential
delays or setbacks. See The Company - Proposed Manufacturing Plans.

        Esterom(R) is presently a Schedule II controlled substance. However, the
results of Phase I and Phase II Clinical Trials showed no central nervous system
activity,  elevated  blood  pressure,  increase in heart rate or  euphoria.  The
Company  believes  that the  components  of the  medicine do not cross the blood
brain barrier, and consequently,  it is expected that there is no propensity for
abuse.  Therefore,  an  application  has  been  made  to  the  Drug  Enforcement
Administration  ("DEA") to reclassify  Esterom(R)  and delist it as a controlled
substance.

SUMMARY OF PHASE I/II FINDINGS

        Based on its clinical studies,  the Company believes that Esterom(R) may
involve a new and unique  mechanism  of action.  The Phase I Study  demonstrated
that the product does not cause detectable  systemic effects including no effect
on the cardiovascular system. During the Study, Esterom(R) caused no significant
adverse events and was observed to be safe. The Company  confirmed that in Phase
I and Phase II trials, no anesthetic activity or  vasoconstrictive  activity was
observed.

         Although the precise function of Esterom(R) is not known, the medicinal
preparation is neither a local anesthetic nor analgesic.  An anesthetic relieves
pain at rest and pain with  movement.  An analgesic  relieves major pain at rest

                                      -23-
<PAGE>

and provides  minor pain relief with  movement.  In comparison  and according to
patient evaluations,  Esterom(R) provides minor relief of pain at rest and major
relief of pain during movement.


DEA STATUS

        Esterom(R) is presently a Schedule II controlled  substance.  A Schedule
II  controlled  substance  is required to be stored and  shipped  under  secured
conditions.  A log must be kept to account for all of the manufactured  product,
with an entry  made  each  time  the  drug  changes  hands  listing  how much is
distributed to whom and how much is prescribed for each patient. The prescribing
health care provider must have a DEA controlled substance license, and depending
upon the State, may be required to use special  prescription pads. The number of
doses and refills is also  controlled,  depending upon the product's  controlled
substance schedule.

        Entropin  has  submitted a petition  to the DEA to delist or  reclassify
Esterom(R)  from its current  schedule II status,  based on the data obtained in
Phase I and II clinical studies in human beings. The data provides evidence that
Esterom(R) by the route of administration and dose proposed for marketing has no
cardiovascular   or  central  nervous  system  effects.   The  Company  believes
Esterom(R) does not have the abuse potential of its precursor, cocaine, and does
not warrant scheduling as a controlled  substance.  The petition is under review
by the U.S.  Attorney  General to  determine  if it is  possible  to approve the
petition  without  violating  United States laws or United States  international
treaty obligations.  A change in controlled substance schedule would require FDA
concurrence  which is  unlikely to be given  before the product is approved  for
marketing.

PROPOSED MANUFACTURING PLANS

        Esterom(R) is made by the solvolysis of cocaine base in propylene gylcol
and water. The Company believes that the components of the medicine do not cross
the blood brain  barrier,  and  consequently,  it is  expected  that there is no
propensity for abuse.  Cocaine is controlled by the DEA under strict importation
regulations  specified  in  law.  To the  Company's  knowledge,  Stepan  Company
("Stepan")  is the only company that can import coca leaves and process them for
the  extraction  of cocaine  bases.  This base is shipped  to  Mallinckrodt  for
purification  and  sale  on  the  medical  and  scientific  market.  Stepan  and
Mallinckrodt  work with the DEA to set  annual  quotas  for  importing  the coca
leaves  related to projected use and sale of the processed  cocaine.  Because of
federal  restrictions,  Esterom(R) can not be manufactured outside of the United
States for sale in the United States. As a result, Mallinckrodt is currently the
sole source for cocaine and for producing Esterom(R).

         Mallinckrodt  has  supplied  all  of  the  Company's  cocaine  for  the
laboratory manufacturing of the product for use in research and clinical trials,
and has been aware of the  development of the drug since the IND application was
filed. In January 1997, the Company entered into 10 year  Development and Supply
Agreements  with  Mallinckrodt,  Inc.  ("Mallinckrodt")  to  develop  all of the
chemistry,  manufacturing and controls  necessary to comply with the drug master
file of the FDA, as well as supply the bulk active  product  for  marketing.  In

                                      -24-

<PAGE>

exchange for these services,  Mallinckrodt  will receive  exclusive  rights as a
supplier of the bulk active  product to the  Company in North  America.  For the
year ended  December 31, 1997,  the contract  price of the  ingredient was fixed
based on the number of liters ordered by the Company.  In subsequent  years, the
cost per liter will be adjusted  based on changes in the price of the components
in the bulk active product.  Although  Mallinckrodt believes it can increase the
coca leaf  importation  quotas to supply the bulk active  material as  required,
there is no assurance that sufficient  importation quotes can be maintained,  or
that additional  governmental  regulations are not imposed on the Company or its
suppliers, which may affect the Company's ability to market the product.

PROPOSED MARKETING PLANS

        The Company  plans to market its  products  through  strategic  partners
and/or distributors.  WCCS has developed a business plan to accomplish the scope
of its work and will assist the  Company in  implementing  its overall  business
plan. In addition,  WCCS will provide additional experienced management with the
intent of assisting the Company in  developing  its product,  Esterom(R),  to be
able to be used  commercially.  With the  assistance  of WCCS,  the Company will
develop a distribution plan and identify and propose  strategic  partners and/or
distributors for the Company's product.

ROYALTY COMMITMENTS

        The  I.B.C.  Limited  Partnership,  a  California  limited  partnership,
participated in the early  development of Esterom(R) and owned the patent rights
to three patents and all  intellectual  property  rights.  In 1993,  the Company
entered into a 30 year  compensation  agreement with six of the limited partners
and heirs of limited partners of I.B.C. who owned in the aggregate 64.28% of the
limited  partnership in exchange for their respective  rights to the patents and
intellectual  property  rights  owned by the  I.B.C.  Limited  Partnership.  The
Company entered into a separate agreement with the remaining two I.B.C.  limited
partners  whose  interests  totaled  35.72%  in  exchange  for  their  remaining
interest. The partnership was subsequently dissolved.


         Under a separate  agreement  entered into with the limited partners and
heirs of limited  partners  comprising  64.28% of the limited  partnership,  the
Company is obligated to pay a bonus  payment in the  aggregate of $96,420 at the
time the Company is  reimbursed  by a drug  company for past  expenses  paid for
development of the medicine,  as well as 64.28% of a decreasing payment rate (3%
to 1%) on cumulative annual royalties received by the Company.  No liability has
been accrued with respect to this agreement.

         In a separate agreement,  the Company has agreed to pay the two limited
partners owning the remaining 35.72% interest in the limited partnership, 35.72%
of a decreasing earned payment (3% to 1%) on cumulative annual sales of products
by the Company until  October 10, 2004.  From October 10, 2004 until October 10,
2014, the Company will pay the partner 17.86% of the earned payment. The Company
also  agreed to pay the former  limited  partner an  aggregate  of $40,000 and a

                                      -25-
<PAGE>

combined  minimum  earned  payment  of $3,572  per  calendar  quarter  beginning
December 1, 1989. The minimum  earned payment is evidenced by a promissory  note
issued  each  quarter  and payable  when the  Company is either  reimbursed  for
expenses  paid for the  development  of the  medicine  or from the first  income
received by the Company from net sales of the medicine.  The quarterly  payments
are to be applied  against  the  earned  payment  to be  received  by the former
limited partner.  The Company has accrued liability regarding the minimum earned
payment.  The Company will receive a credit against the earned  payments for 50%
of monies which are expended in connection  with preparing,  filing,  obtaining,
and maintaining patents involved with the sold rights. See Financial  Statements
- - Note 6.

PATENTS

        Esterom(R) is protected by a U.S.  Composition  Patent granted  December
27, 1994 which includes  safeguarding the discovery of three new molecules.  The
Company's patents are as follows:  Patent  #5,763,456  granted June 9, 1998 with
the Company as Assignee,  expiring  June 31,  2015;  Patent  #5,663,345  granted
September  2, 1997 with the Company as  Assignee,  expiring  September  2, 2014;
Patent  #5,559,123  granted  September  24, 1996 with the  Company as  Assignee,
expiring  September 24, 2013; Patent  #5,525,613  granted June 11, 1996 with the
Company as Assignee,  expiring June 16, 2014;  and,  Patent  #5,376,667  granted
December 27, 1994 with the Company as Assignee,  expiring  December 31, 2012. In
addition,  Dr. Lowell M. Somers obtained the following  initial patents which he
subsequently  assigned to the Company in  September,  1992:  #4,512,996  granted
April 1985,  expiring April 23, 2002; Patent #4,469,700  granted September 1984,
expiring  September 4, 2001;  and, Patent  #4,556,663  granted  December,  1985,
expiring December 3, 2001.

        The  three  initial  patents  were  drawn to  methods  of  treatment  of
rheutomoid  arthritis  based on  compounds  which were  known to the  scientific
community.  The five subsequent  patents were drawn on different compound claims
which were  derivatives of the known compound claims  represented in the earlier
patents. Since the formula for the Company's product,  Esterom(R),  contains the
derivatives  protected by the subsequent patents,  the expiration of the earlier
patents  in 2001 and 2002  will not  permit a  replication  of  Esterom(R)  by a
competitor.

         Drs.  Wynn and Somers have  assigned to the  Company  their  respective
rights to the U. S. Patents and for foreign  countries.  In December,  1993,  an
International  Patent  Application was filed under the Patent Cooperation Treaty
in the  U.S.  Receiving  Officer,  whereby  the  Company's  technology  will  be
protected for a significant market worldwide.

EMPLOYEES

         As of December 31, 1997, the Company had no full time employees.  As of
the date  hereof,  the  Company  has two full time  employees  at its  corporate
headquarters  in  Indio,  California.  The  Company  has  subcontracted  with an
individual  for  corporate  financial  services.  In  addition,  the Company has
subcontracted  with WCCS for  purposes of  completing  the testing  requirements
necessary for FDA approval for the Company's  product,  Esterom(R) for a term of
33 months.  Officers of WCCS presently  serve in the following  positions in the
Company: Daniel L. Azarnoff, M.D., President; Lois Rezler, Ph.D., Vice President
of Science and Regulatory Affairs; and, Roy S. Azarnoff,  Ph.D., Chief Operating

                                      -26-
<PAGE>

Officer.  Drs.  Azarnoff,  Rezler and Azarnoff will not receive  compensation in
addition to the management fees paid to WCCS by the Company,  for their services
rendered to the Company as its officers.  Dr. Daniel  Azarnoff will serve as the
Company's  president  until  such  time  as the  Company  hires  an  experienced
individual to serve as its President.  Drs.  Rezler and Roy Azarnoff shall serve
in their respective capacities until the termination of the WCCS contract.

        The scientific,  medical and chemical  development of Esterom(R) to date
has been done under  contract  with the Medical  University  of South  Carolina,
College of Medicine and the College of Pharmacy, Charleston, South Carolina. See
Management.

PROPERTIES

         The  Company  leases 800 square feet of office  space as its  corporate
headquarters in Indio, California from one of its principal stockholders, Thomas
T.  Anderson,  for a monthly rent of $1,040,  for a two year term which  expires
February 1, 2000,  which the Company believes is market or below market rate for
comparable office space.


        WCCS  leased  2,700  square  feet of  office  space in  Woodland  Hills,
California  from a  non-affiliated  entity  for a five  year (5) year term for a
monthly rent of $4,086.90  for months 1 through 30, and  $4,517.10 for months 31
through 60,  commencing July 1, 1998 and expiring July,  2003. WCCS will provide
approximately  one-half of the office for the use of Entropin  office  staff for
which the Company will reimurse WCCS on a pro rata square foot basis.

COMPETITION

        The pharmaceutical  industry is characterized by intense competition and
is subject to rapid and significant  technological  change.  Rapid technological
development may cause the products to become obsolete before the Company recoups
all or any portion of the related expenses.  The Company's  competitors  include
major pharmaceutical  companies,  biotechnology firms and universities and other
research institutions,  both in the United States and abroad, which are actively
engaged in research and development of products in the  therapeutic  areas being
pursued by the Company.  Most of the Company's  competitors  have  substantially
greater  financial,  technical,  manufacturing,  marketing  and  human  resource
capabilities than the Company.  In addition,  many of the Company's  competitors
have  significantly  greater  experience in testing new or improved  therapeutic
products  and  obtaining  regulatory  approvals of  products.  Accordingly,  the
Company's  competitors may succeed in obtaining regulatory approval for products
more rapidly than the Company. If the Company commences  significant  commercial
sales of its products,  it will also be competing with respect to  manufacturing
efficiencies  and  marketing   capabilities,   areas  in  which  it  has  little
experience.

                                      -27-
<PAGE>



                                LEGAL PROCEEDINGS

        The  Company is not a party to any legal  proceedings  which  management
believes to be material, and there are no such proceedings which are known to be
contemplated.

                                   MANAGEMENT

        The following table sets forth the names and positions of the directors,
executive officers and key employees of the Company:

      Name                  Age         Officer or Position     Director Since
      ----                  ---         -------------------     --------------
Higgins D. Bailey           68       Chairman of the Board      July, 1992

Daniel L. Azarnoff          71       President and Director     February, 1998

Donald Hunter               64       Secretary and Director     February, 1998

Dewey H. Crim               61       Principal Accounting       February, 1998
                                     Officer, Treasurer and
                                     Director

Lois Rezler                 46       Vice President-Science
                                     and Regulatory Affairs

Roy S. Azarnoff             67       Chief Operating Officer

Wellington A. Ewen          58       Chief Financial Officer

James E. Wynn               56       Director                   February, 1998

         The  directors of the Company are elected to hold office until the next
annual meeting of shareholders and until their  respective  successors have been
elected and qualified. Officers of the Company are elected annually by the Board
of Directors and hold office until their successors are elected and qualified.

          The  following  sets forth  biographical  information  concerning  the
Company's directors and executive officers for at least the past five years.

         HIGGINS D.  BAILEY,  Ed.D.  has been an  officer  and  director  of the
Company since July 1992 serving as its President and Chief Executive Officer and
is currently  the Chairman of the Board of the Company.  From 1995 to 1996,  Mr.
Bailey was Interim President and Chief Executive Officer for the  Pharmaceutical
Educational  and  Development  Foundation  at the  Medical  University  of South
Carolina,   Charleston,   South  Carolina,  which  formulates  and  manufactures
pharmaceutical  products. From 1991 to present, he was also business manager for
Thomas T. Anderson Law Firm, Indio, California.  Prior to 1991, Mr. Bailey owned
and operated various travel and tour related companies which subsequently merged
into larger organizations.  In addition,  Mr. Bailey was an educator for over 25

                                      -28-
<PAGE>

years.  Mr.  Bailey  received a B.A.  degree in biology from Eastern  Washington
University,  a M.S.  degree in  program  planning  and  personnel  and Ed.D.  in
administration  and  management  from the  University of  California,  Berkeley,
California.

         DANIEL L.  AZARNOFF,  M.D.,  has been a director of the  Company  since
February  1998 and was  appointed  President of the Company in April 1998.  From
1988 to  present,  Dr.  Azarnoff  has  served  as  President  of D. L.  Azarnoff
Associates,  a company  engaged in  consulting  for various  pharmaceutical  and
biotechnology  companies  including Sandoz,  Orion Pharma,  DeNovo,  Inc., Cibus
Pharmaceutical and Cellegy Pharmaceuticals, Inc. From 1978 to 1985, Dr. Azarnoff
was  Corporate  Senior Vice  President  of G.D.  Searle & Co., an  international
pharmaceutical company, and from 1978 through 1985 served as President of Searle
Research and  Development,  a division of G. D. Searle & Co. Dr. Azarnoff was on
the  faculty of the  University  of Kansas  Medical  School  ("KUMC")  from 1962
through 1978 rising to the rank of KUMC Distinguished  Professor of Medicine and
Pharmacology.  Dr.  Azarnoff  has also held faculty  positions  at  Northwestern
University  Medical School,  the University of Chicago Medical School, St. Louis
University  School of  Medicine  and was a Fulbright  Scholar at the  Karolinska
Institute in Stockholm,  Sweden. Dr. Azarnoff is a member of various medical and
honorary  societies  including the Institute of Medicine of the National Academy
of Sciences.  He has lectured  extensively within and outside the United States,
and  published  numerous  scientific  articles  and books on various  aspects of
clinical  pharmacology.  Dr. Azarnoff has served on various advisory committees,
including the Endocrine and Metabolism  and other Ad Hoc advisory  committees of
the Food and Drug  Administration,  World Heath  Organization,  American Medical
Association,  National Institutes of Health and National Research Council of the
National  Academy of Sciences.  Dr. Azarnoff has served on the Science  Advisory
Board of various corporations which include  Neurobiological  Technology,  Inc.,
Gilead Science,  Inc.,  Oread,  Inc., Cibus  Pharmaceutical  and Sandoz Research
Institute.  Dr. Azarnoff has served or is serving as a director on the following
privately held pharmaceutical drug and development companies: Oread, Inc., Cibus
Pharmaceutical  and  DeNovo,   Inc.  Dr.  Azarnoff  serves  as  Vice  President,
Medical/Regulatory  Affairs for Cellegy  Pharmaceutical,  Inc. None of the above
corporations  are  developing  drugs  similar  to the  Company's  products.  Dr.
Azarnoff  received a B.S.  degree in biology and a M.S.  degree in zoology  from
Rutgers University.  Dr. Azarnoff received an M.D. degree from the University of
Kansas Medical School.

         DONALD  HUNTER has been a director  and the  Secretary  of the  Company
since January 1998. Since 1994, Mr. Hunter has served as a consultant to Entergy
Corporation   as   well   as   other    industrial    concerns    dealing   with
mergers/acquisitions  and other  business  matters.  From  1991 to 1994,  he was
senior vice president of Entergy  Corporation and was responsible for the merger
activities with Gulf States  Utilities.  Prior to 1991, Mr. Hunter was president
and chief  operating  officer of Louisiana  Power & Light  Company and executive
vice president and chief operating  officer of New Orleans Public Service,  Inc.
In  addition,  he has served on the board of  directors of a number of companies
and service companies. His prior business affiliations include positions as vice
president for Yankee Atomic  Electric,  president and majority  owner of Pioneer
Steel  Company,   and  various   executive   positions  with  Helix   Technology
Corporation.  Mr. Hunter  received a B.S.  degree in chemical  engineering  from
Purdue University and a M.S. in nuclear engineering from Iowa State University.

                                      -29-

<PAGE>

         DEWEY H. CRIM has been a  director  and the  Treasurer  of the  Company
since January 1998. Mr. Crim currently  serves as President and Chief  Executive
Officer of the Links Foundation,  Inc. From 1995 to 1997, he served as Executive
Vice  President  of the  Inspirational  Network,  a  national  cable  television
company. From 1980 to 1995, Mr. Crim was employed with BellSouth Corporation,  a
national  telecommunications  company,  where  he  served  as  President  of two
subsidiaries:  TechSouth,  Inc., and BellSouth Media  Technology,  Inc. Mr. Crim
later  served  as a senior  business  development  strategist  on the  BellSouth
Corporate  staff.  In addition,  his  responsibilities  included  negotiating an
alliance  between Walt Disney  Company and three  regional  telephone  companies
which subsequently became Americast  Corporation.  Mr. Crim was also founder and
President of Central Computer  Services,  Inc., a computer service company which
provided  support  services to more than 50 banks.  Mr. Crim began his career at
Electronic Data Systems Corp. in Dallas, Texas. Mr. Crim serves as a director on
the following  privately held companies:  Telecom  Wireless  Solutions,  Inc., a
wireless  telecommunications company, and Eastside Bank, a federal savings bank.
Mr. Crim received a B.S.  degree in business and accounting  from the University
of Alabama.

         LOIS REZLER,  Ph.D.  became Vice  President  of Science and  Regulatory
Affairs of the Company in April,  1998. For more than ten years,  Dr. Rezler has
been  engaged  in  consulting  for  various   pharmaceutical  and  biotechnology
corporations  including Smith Kline, Smith & Nephew,  Cheesborough  Ponds, CIBA,
Merck Sharpe Dome,  Baxter  Travenol and others.  Since January 1996, Dr. Rezler
has acted as a regulatory consultant for Western Center for Clinical Studies. On
behalf of her various  clients,  Dr. Rezler's duties and  responsibilities  have
included  working  at bench  level to assist  in drug  design  and  development,
preparing and submitting  grant  applications  to various  government  agencies,
consulting  in all  aspects of  preparing  IND and NDA  submissions  to the FDA,
including  biologics  devices,  new drugs,  priority drugs and orphan drugs. Dr.
Rezler's  duties  also  include  responsibility  for  developing  time lines and
budgets for the project.  Dr.  Rezler  received her Ph.D.  in Public Health from
Edinburgh University.

         ROY S. AZARNOFF, Ph.D. became Chief Operating Officer of the Company in
April,  1998. Dr. Azarnoff  currently serves as the chief operating  officer for
Western  Center for  Clinical  Studies  (since  1995),  a  consulting  firm that
provides research support  assistance to community  hospitals and medical groups
for clinical trials with pharmaceutical,  biotechnology,  diagnostic and medical
device companies,  and as Chief Executive Officer of Medical Research Consultant
Associates Inc. (since 1989), a consulting firm that provides  research  support
assistance  to community  hospitals,  research  institutes  and drug and medical
device  companies.  From 1986 to 1989,  Dr.  Azarnoff  served as director of the
Office of Research and Sponsored  Projects at California State  University,  and
from 1977-79 and  1981-83,  served as  administrator  for  Technical  Assistance
Projects at  California  State  University  Foundation.  Dr.  Azarnoff was chief
executive officer for Eldercare Management Group from 1984 to 1986. Dr. Azarnoff
developed  and then  directed  the fourth  largest  area  agency on aging in the
United  States as the  director for the Office for the Aging for the City of Los
Angeles from 1972 to 1977.  In  addition,  Dr.  Azarnoff  has authored  numerous
articles and served as assistant  professor  at Boston  University  from 1957 to
1966. Dr. Azarnoff  received his B.A. from New York University,  M.A. from State
University of Iowa and his Ph.D. in Public Health from University of Missouri.

                                      -30-

<PAGE>

         WELLINGTON A. EWEN,  C.P.A., MBA has been the Company's Chief Financial
Officer  since April,  1998 and has served as a consultant  to the Company since
March,  1998.  From 1988 to the  present,  Mr.  Ewen is the owner and manager of
Wellington  A.  Ewen  &  Associates,  a  business  consulting  firm  in  Malibu,
California.  He has acted as a  financial  and  accounting  officer  for various
businesses during that time. Prior to that, Mr. Ewen served as senior manager at
the public  accounting firms of Coopers & Lybrand,  Los Angeles,  California and
Arthur Andersen & Co., New York, New York. Mr. Ewen is a C.P.A. in the States of
New York and California and has MBA and BS degrees from Cornell University.

         JAMES E. WYNN,  Ph.D. has been a director of the Company since February
1998.  Dr. Wynn has served as Professor and  Assistant  Dean for Research at the
Medical  University of South  Carolina.  His  responsibilities  include  faculty
development and research funding plans for the college which are currently being
implemented.  From 1969 to 1982 Dr. Wynn was a faculty  member at the University
of South  Carolina  College  where he rose to the rank of Professor of Medicinal
Chemistry.  In 1982 he assumed the  position of  Professor  and  Chairman of the
Department of Pharmaceutical Sciences,  College of Pharmacy,  Medical University
of South Carolina. In this position Dr. Wynn implemented a new Ph.D. program and
developed a viable research program in pharmaceutical  sciences.  He established
and operated  South  Carolina's  only Drug  Bioequivalence  Evaluation  Program,
serving  as  the  principal  investigator  on 25  drug  bioavailability/clinical
evaluation   trials.   Dr.  Wynn  led  the  development  of  the  Pharmaceutical
Development  Center  (PDC),  a contract  GMP facility  for the  formulation  and
manufacture of clinical supplies for the pharmaceutical  industry.  Dr. Wynn, as
the Company's scientific advisor,  co-authored the patents, supervised the final
process for laboratory  manufacturing of Esterom(R),  and the analytical work to
identify three newly  discovered  molecules.  Since 1984, Dr. Wynn has served as
co-principal  investigator for Entropin's Phase I and Phase II clinical studies.
Dr. Wynn has authored  numerous  articles  which have  appeared in scholarly and
professional  publications.  Recognized as an outstanding  educator in pharmacy,
Dr.  Wynn  received  45  teaching  awards  over  the  past 20  years,  including
recognition as the 1995 South Carolina  "Governor's  Professor of the Year". Dr.
Wynn received his B.S.  degree in pharmacy and his Ph.D. in medicinal  chemistry
with a minor in  analytical  chemistry  from the  Medical  College of  Virginia,
Virginia Commonwealth University, Richmond, Virginia.


         All directors hold office until the next annual meeting of stockholders
and the  election  and  qualification  of their  successors.  Directors  receive
reimbursement of reasonable  expenses  incurred in attending  meetings.  In June
1998, the Board of Directors adopted a resolution whereby the Company granted to
each director  options to purchase up to 60,000  shares of the Company's  Common
Stock,  exercisable at $3.00 per share, which options vest at the rate of 20,000
shares per year commencing February, 1999 through February,  2001. Should any of
the directors cease to serve on the Board of Directors,  all non-vested  options
shall be forfeited.  Officers are elected annually by the Board of Directors and
serve at the  discretion  of the Board.  The Company  has not  entered  into any
employment  agreements  or  any  other  understandings  with  its  directors  or
executive officers concerning compensation.

                                      -31-

<PAGE>

         Daniel L. Azarnoff, M.D., the Company's President and Director, and Roy
S. Azarnoff, Ph.D., the Company's Chief Operating Officer, are brothers.

         Currently, the Company does not have an Audit Committee. 

SCIENTIFIC AND MEDICAL ADVISORY BOARD

         The  Board of  Directors  has  established  a  Scientific  and  Medical
Advisory  Board to advise  and  consult  with the Board of  Directors  as may be
requested by the Board from time-to-time.  Currently, the Scientific and Medical
Advisory Board consists of: Arthur H. Hayes, Jr., M.D.; Gerhard Levy,  Pharm.D.;
William Charles McMaster,  M.D.; Kenneth L. Melmon,  M.D.; and, Lester Mitscher,
Ph.D.  The members of the  Scientific  and Medical  Advisory  Board will receive
$1,500  per  meeting  as  compensation  from the  Company  for  serving  in that
capacity,  as well as reimbursement  for any expenditures  incurred on behalf of
the Company.  In connection with their appointment to the Scientific and Medical
Advisory Board, in June, 1998, each member was granted options to purchase 3,000
shares of the Company's  Common  Stock,  exercisable  at $1.50 per share,  which
options  vest at the rate of 1,000  shares per year over a three (3) year period
until July, 2001.

         ARTHUR HULL HAYES,  JR.,  M.D.,  currently  Vice  Chairman  and Medical
Director,   Nelson  Communications,   Inc.  and  the  President  of  MediScience
Associates,   Inc.  the   regulatory/medical   consulting   division  of  Nelson
Communications.  Dr. Hayes was awarded an NIH  fellowship  in  neuropharmacology
research at Cornell  University  Medical  College in 1960.  He joined  Cornell's
faculty serving as Associate  Professor of Medicine and Pharmacology,  Associate
Dean for Academic Affairs,  and Attending Physician,  The New York Hospital.  He
established and directed the hospital's first cardiac pacemaker clinic. In 1972,
Dr. Hayes became Professor of Medicine and  Pharmacology,  founding  Director of
the  Division  of  Clinical   Pharmacology,   and  Attending  Physician  at  the
Pennsylvania State University College of Medicine,  Hershey Medical Center where
he also  served as  chairman  of the  admissions  committee  and  established  a
referral-research hypertension clinic. He also chaired the hospital Pharmacy and
Therapeutics  Committee and served on the institutional  review board. In April,
1981 Dr.  Hayes  was  appointed  Commissioner  of Food and  Drugs  (FDA)  and an
Assistant Surgeon General,  positions he held until September,  1983 when he was
named  Provost  and Dean,  Professor  of  Medicine,  Pharmacology  and  Family &
Community  Medicine  (Public  Health),  and  Director of the  Institute of Human
Values in Medical Ethics at the New York Medical  College.  Dr Hayes is the past
president and chief executive officer and member of the board of directors of EM
Pharmaceuticals,  Inc.,  a North  American  subsidiary  of E. Merck,  Darmstadt,
Germany.  He has received  numerous  scientific  and public  service  awards and
honors,  is  a  Charter  Diplomate  of  the  American  Colleges  of  Physicians,
Cardiology,  and  Chest  Physicians,  the  American  Academy  of  Pharmaceutical
Physicians,  the New York Academy of Medicine and the Royal College of Medicine.
He  serves  on a  number  of  academic,  commercial  and  foundation  boards  of
directors,  advisory committees and editorial boards, and is the chairman of the
Council on Family Health. He has published over 100 scientific and public policy
articles and book chapters,  delivered more than 2500 professional  lectures and
testified at 24 Congressional Hearings.

                                      -32-

<PAGE>

         GERHARD  LEVY,  Pharm.D.,  is  University  Distinguished  Professor  of
Pharmaceutics  Emeritus  (active) at the State University of New York at Buffalo
School  of  Pharmacy,  where he has  served  since  1958.  Dr.  Levy's  research
interests  are in the areas of  pharmacokinetics,  kinetics  of drug  action and
biopharmaceutics.  He has  been a member  of the  editorial  board or  editorial
advisory  board of 15  journals,  including  International  Journal of  Clinical
Pharmacology,   Clinical   Pharmacology   and   Therapeutics,   Pharmacy  Today,
Perspectives in Biochemical Pharmacology and Clinical  Pharmacokinetics.  He has
authored  over  550  publications  and is  included  in the  list of Most  Cited
Scientists  in the  November  1990  issue of the  Scientist.  He has served on a
number of  committees  of the Food and Drug  Administration  and was a principal
consultant to Bureau of Drugs  Advisory  Panel System.  He has consulted for the
World  Health  Organization  and  was  appointed  to  a  distinguished  visiting
professor  position at several  universities,  including  Hebrew  University  in
Israel,  University  of Iowa,  University of Leiden in the  Netherlands  and the
University of Manchester in Great Britain.  Among many elected  memberships  and
numerous awards for achievement and excellence, Dr. Levy is the recipient of the
first  Lifetime  Achievement  in  the  Pharmaceutical   Sciences  Award  of  the
International Pharmaceutical Federation.

         KENNETH  LLOYD  MELMON,  M.D.,  is currently  Professor of Medicine and
Pharmacology  and  Associate  Dean for  Postgraduate  Medical  Education  at the
Stanford  University  School of Medicine.  He is past  president of the American
Federation of Clinical Research, the Western Society of Clinical  Investigation,
the American Society of Clinical  Investigation  and the Western  Association of
Advancement  of  Science  and  the  Council  of  the  International  Society  of
Immunopharmacology.  He  was  a  recipient  of  a  Burroughs  Wellcome  Clinical
Pharmacology  Scholar award, a National  Institutes of Health Special Fellowship
award  and  a  John  Simon  Guggenheim   Memorial   Foundation   Fellowship  for
Experimental Studies in Clinical Biochemistry and Immunopharmacology. Dr. Melmon
has  authored  over 300  original  papers and book  chapters,  has served on the
editorial board of a dozen scientific journals, including New England Journal of
Medicine, American Journal of Physiology,  Journal of Clinical Investigation and
the Annals of Internal  Medicine,  and has provided  editorial  consultation for
numerous others.  In recent years, he has been a member of the National Research
Council of the Institute of Medicine, the Committee on Technological  Innovation
in  Medicine  of the  National  Academy of Sciences  and the  National  Board of
Medical   Examiners.   He  served  as  the  chairperson  of  the  Commission  of
Prescription  Drug  Use from  1976 to 1980.  In 1978,  he  joined  the  Stanford
University School of Medicine as Chairman of the Department of Medicine where he
initiated  programs  of  academic-industry  interface  that have  made  possible
numerous technology transfers between basic and clinical science. In 1994 he was
honored  with the Oscar B.  Hunter  Award of the  American  Society of  Clinical
Pharmacology and Therapeutics.

         LESTER  A.  MITSCHER,   Ph.D.  is  currently  University  Distinguished
Professor,  Department of Medicinal Chemistry at the University of Kansas. He is
past  chairman of the  Medicinal  Chemistry  Division of the  American  Chemical
Society and chairman of the American Society for  Pharmacognosy.  He is a fellow
of the American  Association  for Advancement of Science and is the recipient of
the Research  Achievement  Award in Natural  Products  Chemistry of the American
Pharmaceutical  Association  Academy of Pharmaceutical  Sciences,  the Volweiler
Award for  Research  Achievement  of the  American  Association  of  Colleges of
Pharmacy,  the Smissman  Award in Medicinal  Chemistry of the American  Chemical
Society and the Higuchi-Simons  Award in the Biomedical  Sciences.  Dr. Mitscher
has consulted  with numerous  pharmaceutical  companies,  including  Proctor and

                                      -33-
<PAGE>

Gamble,   Panax  Laboratories,   Abbott   Laboratories,   G.D.  Searle,   Sandoz
Laboratories, and DuPont Merck Labs. He has served as chairman of the Biological
and Natural Products Section of the National  Institutes of Health,  chairman of
the Hematology and Chemotherapy Study Section of the American Cancer Society and
chairman  of  the  Cooperative  Drug  Screening  Program  of  the  International
Organization  for  Chemistry  in  Development,  World Health  Organization.  Dr.
Mitscher has authored several books, over 200 original papers and book chapters,
and served as an editor of nearly a dozen professional  journals,  including The
Journal of  Antibiotics,  Allergy and Infectious  Diseases,  Medicinal  Research
Reviews (editor-in-chief) and the Journal of Medicinal Chemistry.

         William  Charles  McMaster,  M.D.  is  currently  Professor  and  Chief
Department of Orthopaedic  Surgery at the University of California,  Irvine.  He
also has a private practice in Orange County,  California. He is a member of the
American  Orthopaedic  Society for Sports  Medicine,  has held numerous  elected
offices in the  California  Orthopaedic  Association,  the  American  Academy of
Orthopaedic Surgery and the Western Orthopaedic Association,  is a fellow of the
American  College  of  Surgeons  and  a  founding  member  of  the  Society  for
Biomaterials  and Association  for Arthritic Hip and Knee Surgery.  He served as
team physician for the 1980 United States Olympic and national  swimming team at
the Hawaii  International  Invitational,  1981 USA/USSR swimming  competition in
Kiev,  the 1984 United  States  Olympic  swimming  team,  Fifth  World  Swimming
Championships in Madrid, Spain and Sixth World Swimming  Championships in Perth,
Australia.  In 1988, he served as Physician Specialist for the XXIII Olympiad in
Los Angeles,  California.  Dr. McMaster has authored over 100  publications  and
presentations,   in  his  area  of  research  specialty,   sports  medicine  and
orthopaedic surgery.

                             EXECUTIVE COMPENSATION

SUMMARY COMPENSATION TABLE

         The following table sets forth information regarding  compensation paid
to the Company's  CEO.  During the year ended December 31, 1997, no executive of
the  Company  received  in excess of $100,000  in salary  and/or  bonuses.  Drs.
Azarnoff,  Rezler and Azarnoff will not receive  compensation in addition to the
management fees paid to WCCS by the Company,  for their services rendered to the
Company as its officers.
<TABLE>
<CAPTION>
                                                                                    Long Term
                                                                               Compensation Awards
                                                                             -----------------------
                                       Annual Compensation ($$)              Restricted
                                       ------------------------                Stock        Options &          Other
Name and Position               Year          Salary           Bonus           Awards(4)      SARs(4)       Compensation
- -----------------               ----          ------           -----         --------       ---------       ------------
<S>                             <C>            <C>              <C>             <C>            <C>              <C>
Higgins D. Bailey               1997           $-0-             $-0-            -0-            -0-              $-0-
President and Chief
Executive Officer
                                1996           $-0-             $-0-            -0-            -0-              $-0-
                                1995           $-0-             $-0-            -0-            -0-              $-0-

A. Thomas Tenenbaum,            1997           $-0-             $-0-            -0-            -0-              $-0-
Former President and
Chief Executive Officer         1996           $-0-             $-0-            -0-            -0-              $-0-
of Vanden  
                                1995           $-0-             $-0-            -0-            -0-              $-0-
</TABLE>

                                      -34-


<PAGE>

STOCK OPTION PLAN


          In July 1988,  the Company  adopted a Stock  Option Plan (the  "Option
Plan")  which  provides for the  issuance of stock  bonuses or stock  options to
purchase up to 16,666 shares of Common Stock, adjusted to reflect the subsequent
recapitalization  of  the  Company,  to  employees,   officers,   directors  and
consultants of the Company. The Option Plan expired July 2, 1998.

OPTION GRANTS

         Prior to the  expiration of the Company's  Stock Option Plan on July 2,
1998,  the Company issued options to purchase all 16,667 shares of the Company's
Common Stock  reserved  under the Option Plan to WCCS,  exercisable at $1.50 per
Share.  WCCS  will  allocate  options  to  purchase;  (i)  15,000  shares of the
Company's  Common Stock to members of the Scientific and Medical  Advisory Board
which  options  will vest pro rata  annually  over a three (3) year period until
July,  2001;  and,  (ii) the remaining  1,667 options to various  administrative
personnel  employed by WCCS,  which  options  will vest pro rata  monthly over a
three (3) year period until July, 2001.

STOCK COMPENSATION PLAN

         In July 1988,  the  Company  adopted a Stock Bonus Plan  ("Stock  Bonus
Plan"),  to support and increase the  Company's  ability to attract,  retain and
compensate  persons of experience  and ability and whose services are considered
valuable.  The Stock Bonus Plan  expired on July 2, 1998.  No shares were issued
pursuant to the Stock Bonus Plan.

LIMITATIONS ON DIRECTORS' AND OFFICERS' LIABILITY

         The Company's Amended Articles of Incorporation  limit the liability of
directors to  shareholders  for monetary  damages for breach of a fiduciary duty
except in the case of liability:  (i) for any breach of their duty of loyalty to
the Company or its shareholders; (ii) for acts or omissions not in good faith or
which involve  intentional  misconduct or a knowing  violation of law; (iii) for
unlawful distributions as provided in Section 7-108-403 of the Colorado Business
Corporation  Act; or (iv) for any transaction from which the director derived an
improper personal benefit.

         The  Company's  Articles of  Incorporation  and Bylaws  provide for the
indemnification  of directors and officers of the Company to the maximum  extent
permitted  by  law,   including  Section  7-109-102  of  the  Colorado  Business
Corporation Act, against all liability and expense  (including  attorneys' fees)
incurred  by reason  of the fact that the  officer  or  director  served in such
capacity for the  Company,  or in a certain  capacity for another  entity at the
request of the Company.  Section 7- 109-102 of the Colorado Business Corporation
Act  provides  generally  for  indemnification  of directors  against  liability
incurred  as a result of  actions,  suits or  proceedings  if they acted in good
faith and in a manner  they  reasonably  believed to be in or not opposed to the
best interests of the Company.

                                      -35-
<PAGE>

         On January  29,  1998,  the Company  obtained  Directors  and  Officers
indemnity liability insurance coverage,  including securities coverages,  in the
amount of $3,000,000  which  indemnifies the Company against claims,  as well as
provides  coverage  against any claims against the officers and directors of the
Company  which (i) the  Company is not legally  permitted  or required to pay or
(ii) when the  Company  is legally  required  or  permitted  to pay such loss as
indemnity  to the  Directors  and  Officers but cannot in fact pay such loss due
solely to the financial insolvency of the Company.

         There is no pending  litigation  or  proceeding  involving  a director,
officer,  employee or other agent of the Company as to which  indemnification is
being or may be sought,  and the  Company  is not aware of any other  pending or
threatened  litigation  that may  result in claims  for  indemnification  by any
director, officer, employee or other agent.


                                      -36-
<PAGE>

                 SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS
                                 AND MANAGEMENT

         On January 15, 1998,  the Company  effected a reverse  stock split of 1
share for each 300 shares of its Common Stock issued and  outstanding.  Pursuant
to the terms of the Merger  Agreement,  the Company  issued shares of its Common
Stock and Series A redeemable  non-voting Preferred Stock to the shareholders of
Old  Entropin as of January 15, 1998 on the basis of one share of the  Company's
Common Stock and Series A  redeemable  non-voting  Preferred  Stock for each one
share of Old Entropin common stock and Series A redeemable  non-voting preferred
stock  issued  and  outstanding  which  resulted  in a change in  control of the
beneficial ownership of the Company.


         The  Company  has  entered  into an  agreement  with its  officers  and
directors and major  shareholders  pursuant to which  4,748,388  Shares owned by
such persons may be sold only as the Company may permit for a period of one year
from the date of this  Prospectus.  The  Shareholders  Agreement  was entered in
anticipation  that potential  funding  sources at times may require or request a
restriction  on disposition  of securities  owned by a company's  management and
major shareholders.

         The following table sets forth, as of the date hereof, the ownership of
the Company's Common Stock and Series A redeemable non-voting Preferred Stock by
(i) each  director  and  executive  officer of the Company,  (ii) all  executive
officers and directors of the Company as a group, and (iii) all persons known by
the  Company to  beneficially  own more than 5% of the  Company's  Common  Stock
and/or Series A redeemable  non-voting  Preferred  Stock. Not included are up to
433,333  options to be issued to WCCS,  certain  officers of which also serve as
officers of the  Company.  See  Interests  of  Management  and Others in Certain
Transactions.
<TABLE>
<CAPTION>
                                                   Common Stock                   Series A Preferred Stock
                                                   ------------                   ------------------------
                                        Amount and                              Amount and
                                        Nature of                               Nature of
Name and Address                        Beneficial             Percent          Beneficial         Percent
 of Shareholder                         Ownership(1)           of Class         Ownership(1)       of Class
- ----------------                         ---------             --------         ---------          --------
<S>                                     <C>                     <C>             <C>                 <C>
Higgins D. Bailey                       1,404,093(2)            23.4%           178,000              5.6%
45926 Oasis Street
Indio, CA 92201

Thomas T. Anderson                      1,404,093(3)            23.4%           710,041(4)          22.1%
45926 Oasis Street
Indio, CA 92201

Milton D. McKenzie                      1,750,417(5)            29.2%               -0-              -0-
45926 Oasis Street
Indio, CA 92201

Caroline T. Somers                        905,793               15.1%           822,446(6)          25.6%
233 Paulin, No. 8512
Calexco, CA 92231
</TABLE>
                                      -37-

<PAGE>
<TABLE>
<CAPTION>
                                                   Common Stock                   Series A Preferred Stock
                                                   ------------                   ------------------------
                                        Amount and                              Amount and
                                        Nature of                               Nature of
Name and Address                        Beneficial             Percent          Beneficial         Percent
 of Shareholder                         Ownership(1)           of Class         Ownership(1)       of Class
- ----------------                        ----------             --------         ---------          --------
<S>                                    <C>                       <C>           <C>                   <C>
Lowell M. Somers                         905,793(7)              15.1%           822,446             25.6%
233 Paulin, No. 8512
Calexco, CA 92231

James E. Wynn                            518,085                  8.6%         1,500,000             46.7%
306 Ayers Circle
Summerville, SC 29485

Donald Hunter                            150,000(8)               2.5%               -0-              -0-
598 Kinzie Island Court
Sanibel, FL 33957

Dewey H. Crim                             20,000(9)               0.3%               -0-              -0-
242 Southern Hills Drive
Duluth, GA 30039

Daniel L. Azarnoff                           -0-                  -0-                -0-              -0-
433 Airport Blvd., Suite 419
Burlingame, CA 94010-2014

Wellington A. Ewen                           -0-                  -0-                -0-              -0-
45926 Oasis Street
Indio, CA 92201

Lois Rezler                                  -0-                  -0-                -0-              -0-
433 Airport Blvd., Suite 419
Burlingame, CA 94010-2014

Roy Azarnoff                                 -0-                  -0-                -0-              -0-
433 Airport Blvd., Suite 419
Burlingame, CA 94010-2014

All Directors and Executive            2,092,178                 34.5%         1,678,000             52.3%
Officers as a group (8 persons)
</TABLE>
- -----------------
(1)  Calculated  pursuant to Rule  13d-3(d) of the  Securities  Exchange  Act of
     1934.  Unless otherwise stated below,  each such person has sole voting and
     investment  power with  respect to all such  shares.  Under Rule  13d-3(d),
     shares not outstanding  which are subject to options,  warrants,  rights or
     conversion privileges exercisable within 60 days are deemed outstanding for
     the purpose of calculating the number and percentage  owned by such person,
     but  are  not  deemed  outstanding  for  the  purpose  of  calculating  the
     percentage owned by each other person listed.
(2)  Owned in joint  tenancy with  Shirley A.  Bailey,  the spouse of Higgins D.
     Bailey. (3) Held of record by Higgins D. Bailey as security for a loan made
     by Mr.  Bailey to Mr.  Anderson.  Milton D.  McKenzie has sole voting power
     with respect to these shares.
(4)  Held of record by David M.  Chapman and Samuel F.  Trussell as security for
     deferred compensation owed to Messrs. Chapman and Trussell by Mr. Anderson.

                                      -38-

<PAGE>

(5)  Including  1,404,093  shares  held in the name of  Higgins  D.  Bailey,  as
     pledgee in  connection  with a loan made by Higgins D.  Bailey to Thomas T.
     Anderson which is collateralized by the shares, and over which Mr. McKenzie
     has sole voting power as a result of an  irrevocable  proxy  granted to Mr.
     McKenzie by Mr.  Anderson in connection with a loan made by Mr. McKenzie to
     Mr.  Anderson  which is  collateralized  by the same  shares.  In addition,
     includes  243,490  Shares  held of record by CapMac  Eighty-two,  a limited
     partnership of which Mr. McKenzie is a general partner.
(6)  Includes 822,446 shares of Series A redeemable  non-voting  Preferred Stock
     owned by Lowell M. Somers, the spouse of Caroline T. Somers.
(7)  Includes  905,793  shares of Common Stock owned by Caroline T. Somers,  the
     spouse of Lowell M. Somers.
(8)  Of these  shares,  10,000  shares  are held in the name of  Deloras  Decker
     Hunter,  Trustee of the Deloras Decker Hunter  Generation  Skipping  Trust.
     Deloras  Decker Hunter is the spouse of Mr. Hunter and Mr. Hunter is deemed
     to have voting control over these 10,000 shares. In addition,  these shares
     include  60,000  shares  underlying  an option  assigned  to Mr.  Hunter in
     January,  1998.
(9)  These shares are owned in joint tenancy with Virginia  Crim,  the spouse of
     Dewey H. Crim.

           INTERESTS OF MANAGEMENT AND OTHERS IN CERTAIN TRANSACTIONS

        During 1997, the Company received  advances totaling $15,000 from Milton
D. McKenzie,  a stockholder  in the Company.  The advances did not bear interest
and were payable upon demand. In addition, during 1996 and 1997, the Company was
advanced an  aggregate  of $73,873 by Higgins D. Bailey,  the  Company's  former
President,  current  Chairman  and  stockholder.  In  January  1998,  the  above
referenced debts were paid in full.

         The  Company  had  accrued  the  following   long-term   debt  owed  to
stockholders at December 31, 1996 and 1997:
<TABLE>
<CAPTION>
                                                                      1996                  1997
                                                                      ----                  ----
<S>                                                                <C>                    <C>
8% Note payable - Thomas T. Anderson,  a stockholder,
issued for cash advances, principal plus accrued interest
due December 31, 2000, unsecured                                   $  631,678            $  631,678

8% Note payable - Higgins D. Bailey, the Company's
former President, current Chairman and a stockholder,
issued for cash advances, principal plus accrued interest
due December 31, 2000, unsecured                                      178,000               178,000

8% Note payable - Lowell M. Somers, a stockholder,
issued for past services, principal plus accrued interest
due December 31, 2000, unsecured                                      731,678               731,678

Accrued interest payable to Thomas T. Anderson and
Lowell M. Somers, stockholders of the Company                          60,341               169,131
                                                                   ----------            ----------
                                                                   $1,601,697            $1,710,487
                                                                   ==========            ==========
</TABLE>
                                      -39-
<PAGE>

         On January 15, 1998,  the Company  converted all above noted  long-term
debt plus accrued  interest to 1,710,487  shares of the Company's  redeemable 8%
non-voting, non-cumulative Series A Preferred Stock at $1 per share, for a total
of $1,710,487.
   
         During November 1997, the Company began  negotiating with James E. Wynn
regarding  compensation for research and development services provided since the
inception  of the  Company.  In exchange  for these past  services,  the Company
agreed to issue an 8% note payable to the individual in the principal  amount of
$1,500,000  maturing  December  31,  2000.  Subsequent  to year end, the Company
converted this obligation to 1,500,000 shares of its non-voting,  non-cumulative
redeemable  Series A preferred  stock,  at $1.00 per share.  In December,  1997,
certain  shareholders of the Company contributed a portion of their common stock
to James E. Wynn as partial  settlement  for research and  development  services
(259,042 shares valued at $712,000,  approximately $2.75 per share). The expense
and related capital  contributions were reflected at December 31, 1997. James E.
Wynn was  subsequently  appointed a Director to the Company's Board in February,
1998.
    
         In January 1998,  the Company  entered into an agreement  with James E.
Wynn, a director of the  Company,  whereby the Company  granted  James E. Wynn a
non-exclusive  right to  develop  new  products  that  contain  the same  active
ingredients as Esterom(R),  but are  formulated  differently.  All rights to the
improved products will remain the exclusive property of the Company and James E.
Wynn  will  receive  two  (2%)  percent  royalties  on the net  sales of all new
improved products. The expiration date of this agreement is January 1, 2003.

         In February 1998, the Company entered into a lease arrangement with one
of its principal  shareholders,  Thomas T. Anderson.  The lease  encompasses 800
square feet of office space at a monthly rate of $1,040.

         On February  16, 1998,  the  Company's  Board of  Directors  approved a
contract  between  the  Company  and James E. Wynn,  whereby  James E. Wynn will
manufacture a duplicate sample of the Phase II clinical  material  necessary for
quality  control  of  the  clinical  supply  manufactured  in  the  Mallinckrodt
laboratories.

         On April 18, 1998,  the Company  entered into an agreement with Western
Center for Clinical  Studies  ("WCCS") whereby WCCS agreed to assist the Company
in  completing  the  Phase III  study  and NDA  Phase  for FDA  approval  of the
Company's product,  Esterom(R), in exchange for $880,400 and options to purchase
an aggregate of 450,000 shares of the Company's  common stock at $1.50 per share
over a five (5) year period.  Officers of WCCS presently  serve in the following
positions in the  Company:  Daniel L.  Azarnoff,  President;  Lois Rezler,  Vice
President  of Science  and  Regulatory  Affairs;  and,  Roy S.  Azarnoff,  Chief
Operating Officer.  Daniel L. Azarnoff has served as a director on the Company's
Board of Directors since February, 1998.

                                      -40-

<PAGE>
                            DESCRIPTION OF SECURITIES

COMMON STOCK

         The Company is authorized  to issue up to  50,000,000  shares of Common
Stock,  $.001 par value. There are 6,000,051 shares presently  outstanding.  All
shares of Common Stock have equal  voting  rights and,  when validly  issued and
outstanding,  have one  vote  per  share  in all  matters  to be  voted  upon by
shareholders.  The  shares of Common  Stock  have no  preemptive,  subscription,
conversion  or  redemption  rights  and may be  issued  only as  fully  paid and
non-assessable  shares.  Cumulative  voting in the  election of directors is not
allowed,  which means that the holders of a majority of the  outstanding  shares
represented  at any  meeting at which a quorum is present  will be able to elect
all of the directors if they choose to do so and, in such event,  the holders of
the remaining shares will not be able to elect any directors.  On liquidation of
the Company,  each common shareholder is entitled to receive a pro rata share of
the Company's assets available for distribution to common shareholders.

PREFERRED STOCK
   
         The Company is authorized  to issue up to a total of 10,000,000  shares
of preferred stock,  $.001 par value,  with the shares to be issued in series by
the  Board of  Directors.  The  Company's  Board  of  Directors  has  designated
3,210,487 shares of preferred stock as Series A redeemable  non-voting Preferred
Stock,  of which all were  issued.  There are four (4)  holders of record of the
Company's  Series A redeemable  non-voting  Preferred  Stock.  In addition,  the
Company's Board of Directors has designated 400,000 shares of preferred stock as
convertible  Series B Preferred  Stock, of which 250,500 have been issued.  Such
shares were sold in a private offering at $5.00 per Share and are convertible on
a 1 for 1 basis into Common Stock.  The remaining  shares of preferred stock may
be issued  in one or more  series  from  time to time  with  such  designations,
rights,  preferences  and  limitations  as the Company's  board of directors may
determine without approval of its shareholders.
    
         Series A Preferred Stock is designated as redeemable eight (8%) percent
non-cumulative  non-voting  preferred  stock with $.001 par value.  The Series A
Preferred Stock is redeemable only from 20% to 50% of annual "Earnings", but not
to exceed "Net Cash Flow from  Operating  Activities" as those terms are defined
under GAAP. The Series A Preferred  Stock will  automatically  expire on January
16, 2005 if not fully redeemed within that time period.


         Series B Preferred  Stock is designated as redeemable ten (10%) percent
cumulative  non-voting preferred stock with $.001 par value and convertible on a
1 for 1 basis into Common Stock. At the Company's election, annual dividends may
be paid in cash and/or in Shares of the Company's  Common Stock,  at the rate of
one share of Common  Stock for each $5.00 in accrued  dividends.  All issued and
outstanding Preferred Stock shall be redeemed in full on or before July 15, 2003
("Expiration  Date").  The Company reserves the right to redeem,  in whole or in
part based on a pro rata basis with other  holders of the Preferred  Stock,  the
outstanding Preferred Stock upon 30 days' notice at $5.00 per share plus accrued

                                      -41-
<PAGE>

and unpaid  dividends to the redemption date from the date of issuance up to the
Expiration Date.  Notwithstanding  the foregoing,  in the event that the Company
redeems  the  Preferred  Stock  within  one  year  from  date of  issuance,  the
redemption  price shall be $6.00 per share plus accrued and unpaid  dividends to
the redemption date;  provided,  however,  if the Company redeems such Preferred
Stock within six months from date of issuance,  the Preferred  Shareholder shall
receive a dividend equivalent to one-half of the annual accrued dividend amount.

          The rights,  preferences  and limitations of separate series of serial
preferred  stock may differ with respect to such matters as may be determined by
the Company's  Board of Directors,  including  without  limitation,  the rate of
dividends,  method or nature or prepayment of  dividends,  terms of  redemption,
amounts payable on liquidation,  sinking fund provisions,  conversion rights and
voting rights.  The ability of the Board to issue  preferred stock could also be
used by it as a means for  resisting  a change of control of the Company and can
therefore be considered an "anti-takeover" device.

OPTION/WARRANTS

         The Company issued options to purchase  180,001 shares of the Company's
Common Stock to a non-affiliate  for business  advisory  services at an exercise
price of $2.80 per share for a period of five (5) years ending October 28, 2003.
In April,  1998, the Company granted  options to purchase  100,000 Shares of the
Company's  Common  Stock  at a price  of  $4.00  per  share  to this  party  for
additional advisory services, exercisable at such time as the services have been
completed.  In June,  1998, the Company issued options to purchase 16,667 shares
of the Company's  Common Stock to Western Center for Clinical Studies ("WCCS") ,
pursuant to an agreement  between the Company and WCCS of which:  (i) options to
purchase  15,000  shares of the  Company's  Common  Stock will be  allocated  to
members of the Scientific and Medical  Advisory Board,  exercisable at $1.50 per
Share,  which  options will vest pro rata  annually over a three (3) year period
until July,  2001;  and, (ii) options to purchase  1,667 shares of the Company's
Common Stock will be allocated to administrative  staff of WCCS,  exercisable at
$1.50 per Share,  which options will vest pro rata monthly over a three (3) year
period until July,  2001. The  above-mentioned  options are being  registered in
this  Prospectus  pursuant  to  registration  rights  granted in the  respective
contractual agreements.

         In June 1998, the Board of Directors  adopted a resolution  whereby the
Company granted to each director  options to purchase up to 60,000 shares of the
Company's  Common Stock,  exercisable at $3.00 per share,  which options vest at
the rate of 20,000 shares per year commencing  February,  1999 through February,
2001. Should any of the directors cease to serve on the Board of Directors,  all
non-vested options shall be forfeited.

DIVIDEND POLICY

         Dividends are payable on Common Stock when,  as, and if declared by the
Board of Directors out of funds legally  available to pay dividends,  subject to
any preferences  which may be given to holders of preferred  stock.  The Company

                                      -42-
<PAGE>

has paid no cash  dividends to date and it does not  anticipate  payment of cash
dividends in the foreseeable future.

STOCK TRANSFER AGENT

         The Company has designated Corporate Securities Transfer, Inc., Denver,
Colorado as its transfer agent for the Common Stock.

                            SELLING SECURITY HOLDERS

         This  Prospectus  covers the proposed sale of (a) 5,400,001  Shares and
180,001 Shares underlying options pursuant to the terms of an Agreement and Plan
of Merger (the  "Merger  Agreement");  (b)  300,000  Shares in  accordance  with
certain  registration  rights  granted  to  purchasers  in a  private  placement
offering of  securities  conducted  by Old Entropin in December  1997;  and, (c)
54,545 Shares and an additional  116,667 Shares  underlying  options pursuant to
contractual  agreements  to register  such  shares  with  certain of the Selling
Shareholders.

         Pursuant to an agreement  among certain Selling  Security  Holders (the
"Shareholders  Agreement")  who  are  Company  officers,   directors  and  major
shareholders,  an aggregate  of  4,748,388  Shares which they own may be sold or
otherwise  disposed of for a period of one year from the date of this Prospectus
only as the  Company  may  permit.  The  Shareholders  Agreement  was entered in
anticipation  that potential  funding  sources at times may require or request a
restriction  on disposition  of securities  owned by a company's  management and
major  shareholders.  The Shares  subject to the  Shareholders  Agreement may be
offered  or sold  under  this  Prospectus  during  the term of the  Shareholders
Agreement upon the Company's  consent and after  expiration of the  Shareholders
Agreement without such consent. See The Company and Selling Security Holders.

         The Company will not receive any of the  proceeds  from the sale of the
Shares by the Selling Security  Holders.  The Company will receive cash proceeds
from the exercise, if any, of outstanding options of up to $929,000 in cash.
   
         The  following  table sets forth  certain  information  concerning  the
beneficial  ownership  of  Common  Stock  and  Preferred  Stock by each  Selling
Security Holder as of August 13, 1998. No shares of Series A Preferred Stock are
being registered hereby.
    
<TABLE>
<CAPTION>
   
                                                                                                 Shares of      Shares of
                                                                                                 Series A       Series B
                                Shares           Shares of          Shares of Common Stock       Preferred      Preferred
                               of Common          Common             Owned After Offering          Stock          Stock  
                              Stock Owned         Stock            ------------------------     Owned Before   Owned Before
                               Prior to          Offered                                         and After      and After
           Name                Offering (1)      Hereby (2)        Number        Percentage      Offering       Offering
           ----               ----------        --------           ------        ----------     ------------   ------------
<S>                           <C>               <C>                 <C>             <C>          <C>            <C>
Caroline T Somers               905,793           905,793           -0-             -0-          822,446(3)         -0-

Higgins D. Bailey *&
Shirley A. Bailey              1,404,093         1,404,093          -0-             -0-          178,000(4)         -0-

Chandler G. Brown               257,085           257,085           -0-             -0-              -0-            -0-
    
</TABLE>


                                      -43-

<PAGE>
<TABLE>
<CAPTION>
   
                                                                                                 Shares of      Shares of
                                                                                                 Series A       Series B
                                Shares           Shares of          Shares of Common Stock       Preferred      Preferred
                               of Common          Common             Owned After Offering          Stock          Stock  
                              Stock Owned         Stock            ------------------------     Owned Before   Owned Before
                               Prior to          Offered                                         and After      and After
           Name                Offering (1)      Hereby (2)        Number        Percentage      Offering       Offering
           ----               ----------        --------           ------        ----------     ------------   ------------
<S>                          <C>               <C>                  <C>             <C>          <C>             <C>
CapMac Eighty-Two
Limited Partnership            243,490           243,490            -0-             -0-             -0-             -0-

Milton D. McKenzie,
Trustee of the Milton
D. McKenzie
Revocable Trust              1,750,417(5)      1,750,417(5)         -0-             -0-             -0-             -0-

James E. Wynn*                 518,085           518,085            -0-             -0-          1,500,000          -0-

CKC Partners                    78,300            78,300            -0-             -0-             -0-           5,000

Danny & Nancy Yu                10,000            10,000            -0-             -0-             -0-           5,000

Brent & Marlene
Jackson                         50,000            50,000            -0-             -0-             -0-             -0-

William L. Currin               10,000            10,000            -0-             -0-             -0-             -0-

Jacquelyn D.
Anderson Baker                   5,454             5,454            -0-             -0-             -0-             -0-

Interstate Johnson
Lane Corporation                10,000            10,000            -0-             -0-             -0-           5,000

Dennis K. Metzler                5,000             5,000            -0-             -0-             -0-             -0-

Jerry L. and Nancy
Sands                            1,000             1,000            -0-             -0-             -0-             -0-

The Macy Family
Trust                           10,000            10,000            -0-             -0-             -0-          20,000

Dewey H.*  &
Virginia Crim                   20,000            20,000            -0-             -0-             -0-             -0-

James W. Toot                    7,500             7,500            -0-             -0-             -0-          25,000

Gladys F. Decker &
Deloras D. Hunter,
Trustees of the Gladys
F. Decker Trust No. 1           20,000            20,000            -0-             -0-             -0-           5,000

Donald Hunter*                 140,000(6)        140,000(6)         -0-             -0-             -0-             -0-

Deloras Decker
Hunter, Trustee of the
Deloras Decker
Hunter Generation
Skipping Trust                  10,000            10,000            -0-             -0-             -0-           5,000
    
</TABLE>
                                      -44-

<PAGE>
<TABLE>
<CAPTION>
   
                                                                                                 Shares of      Shares of
                                                                                                 Series A       Series B
                                Shares           Shares of          Shares of Common Stock       Preferred      Preferred
                               of Common          Common             Owned After Offering          Stock          Stock  
                              Stock Owned         Stock            ------------------------     Owned Before   Owned Before
                               Prior to          Offered                                         and After      and After
           Name                Offering (1)      Hereby (2)        Number        Percentage      Offering       Offering
           ----               ----------        --------           ------        ----------     ------------   ------------
<S>                          <C>               <C>                  <C>             <C>         <C>             <C>
Suzanne Oliphant                10,000            10,000            -0-             -0-             -0-             -0-

Albert W. White                 10,000            10,000            -0-             -0-             -0-             -0-

Stephen H. West                 20,000            20,000            -0-             -0-             -0-           5,000

C. Richard Harrison             10,000            10,000            -0-             -0-             -0-             -0-

Jeanette Y. Mihaly              20,000            20,000            -0-             -0-             -0-             -0-

Joy Ann Svenson                 10,000            10,000            -0-             -0-             -0-             -0-

Richard L. Monfort             180,000           180,000            -0-             -0-             -0-             -0-

David T. Treadwell              10,000            10,000            -0-             -0-             -0-             -0-

David Bressler                   5,000             5,000            -0-             -0-             -0-             -0-

Gerald Olesh                    10,000            10,000            -0-             -0-             -0-             -0-

Arthur Kassoff                  10,000            10,000            -0-             -0-             -0-             -0-

Armond A. Azharian               5,000             5,000            -0-             -0-             -0-             -0-

The Underwood
Family Partners                120,002(7)        120,002(7)         -0-             -0-             -0-             -0-

Steven C. & Lynn T.
Quoy                           120,000(8)        120,000(8)         -0-             -0-             -0-             -0-

Thomas T. Anderson
Trust                        1,404,093(9)      1,404,093(9)         -0-             -0-         710,041(10)         -0-

Gross Ventures, Inc. 
Profit Sharing Trust            20,000            20,000            -0-             -0-             -0-             -0-

B. A. Bates                     20,000            20,000            -0-             -0-             -0-             -0-

David M. Chapman                10,000            10,000            -0-             -0-             -0-             -0-

Samuel Trussell                 10,000            10,000            -0-             -0-             -0-             -0-

Xavier Equihua                   1,000             1,000            -0-             -0-             -0-             -0-

Samantha Landy IRA               7,272             7,272            -0-             -0-             -0-           4,000

Karen Campbell,
Custodian for Lauren
and Abigail Campbell             2,000             2,000            -0-             -0-             -0-             -0-

Watson Corporation               4,000             4,000            -0-             -0-             -0-             -0-
    
</TABLE>

                                      -45-

<PAGE>
<TABLE>
<CAPTION>
   
                                                                                                 Shares of      Shares of
                                                                                                 Series A       Series B
                                Shares           Shares of          Shares of Common Stock       Preferred      Preferred
                               of Common          Common             Owned After Offering          Stock          Stock  
                              Stock Owned         Stock            ------------------------     Owned Before   Owned Before
                               Prior to          Offered                                         and After      and After
           Name                Offering (1)      Hereby (2)        Number        Percentage      Offering       Offering
           ----               ----------        --------           ------        ----------     ------------   ------------
    
<S>                            <C>               <C>               <C>              <C>             <C>             <C>
Watson Development
Corporation                      1,000             1,000            -0-             -0-             -0-             -0-

Kenneth P. Carter,
Custodian for Taylor
and Sydney Carter                2,000             2,000            -0-             -0-             -0-             -0-

Douglas F. and Dena
K. Carter                       12,000(11)        12,000(11)        -0-             -0-             -0-             -0-

Michael A. Oliver                3,000             3,000            -0-             -0-             -0-             -0-

A. Thomas
Tenenbaum**                     39,500            20,000           19,500           -0-             -0-             -0-

David Callaham                  10,000            10,000            -0-             -0-             -0-             -0-

Max Gould                       44,545            44,545            -0-             -0-             -0-             -0-

John R. Bridges, Jr.            10,000            10,000            -0-             -0-             -0-             -0-

WCCS                            16,667(12)        16,667            -0-             -0-             -0-             -0-

LMU & Co.                      100,000(13)       100,000            -0-             -0-             -0-             -0-

*    Denotes a director and/or officer-employee of the Company
**   Denotes a person  previously  employed  by, or a director  of, the  Company
     during the past three years.
(1)  Beneficial  ownership is calculated in accordance with Rule 13d-3(d) of the
     Securities  Exchange Act of 1934, as amended.  Under Rule 13d-3(d),  shares
     not outstanding that are subject to options, warrants, rights or conversion
     privileges  exercisable  within  60 days  are  deemed  outstanding  for the
     purpose of calculating  the number and  percentage  owned by such person of
     the class,  but not deemed  outstanding for the purposes of calculating the
     percentage owned of the class by any other person.
(2)  The number of Shares offered hereby consists of outstanding Shares held and
     offered for the account of the Selling Shareholders.
(3)  The  Preferred  Shares  are held of record by Lowell M.  Somers,  spouse of
     Caroline D. Somers.
(4)  The Preferred Shares are held of record by Higgins D. Bailey.
(5)  Including  1,404,093  shares  held in the name of  Higgins  D.  Bailey,  as
     pledgee in  connection  with a loan made by Higgins D.  Bailey to Thomas T.
     Anderson which is collateralized by the shares, and over which Mr. McKenzie
     has sole voting power as a result of an  irrevocable  proxy  granted to Mr.
     KcKenzie by Mr.  Anderson in connection with a loan made by Mr. McKenzie to
     Mr.  Anderson  which is  collateralized  by the same  shares.  In addition,
     includes  143,490  Shares  held of record by CapMac  Eighty-two,  a limited
     partnership of which Mr. McKenzie is a general partner.
(6)  Includes  20,000  Shares  held of record  by the  Donald  Hunter  Residuary
     Marital Trust as to which Mr. Hunter has  beneficial  ownership as trustee.
     In addition,  the Shares include options to purchase 60,000 Shares Does not
     include Shares held by record by spouse.
(7)  Includes 60,001 Shares underlying options
(8)  Includes 60,000 Shares underlying options

                                      -46-

<PAGE>

(9)  Held of record by  Higgins  D.  Bailey as  security  for a loan made by Mr.
     Bailey to Mr.  Anderson.  Milton D.  McKenzie  has sole  voting  power with
     respect to these shares.
(10) Held of record by David M.  Chapman and Samuel F.  Trussell as security for
     deferred compensation owed to Messrs. Chapman and Trussell by Mr. Anderson.
(11) Includes  4,000 Shares held of record by Douglas F. Carter,  Custodian  for
     McKenzie  L.  Carter as to which Mr.  Carter has  beneficial  ownership  as
     custodian.
(12) The Shares  constitute  options to purchase  16,667 Shares of the Company's
     Common Stock which were granted to WCCS pursuant to a contractual agreement
     for  assignment  as  follows:  options to  purchase  15,000  Shares will be
     assigned to members of the Company's Scientific and Medical Advisory Board;
     and,   options  to  purchase   1,667   Shares  will  be  assigned  to  WCCS
     administrative personnel.
(13) The Shares  constitute  options to purchase 100,000 Shares of the Company's
     Common Stock.

                              PLAN OF DISTRIBUTION

         The Selling  Shareholders  have  advised the Company  that prior to the
date of this Prospectus  they have not made any agreements or arrangements  with
any  underwriters,  brokers or dealers  regarding the resale of the Shares.  The
Company has been advised by the Selling  Shareholders that the Shares may at any
time or from time to time be offered  for sale  either  directly  by the Selling
Shareholders or by their transferees or other successors in interest. Such sales
may  be  made  in  the  over-the-counter   market  or  in  privately  negotiated
transactions.

         The  Selling  Shareholders  have  exercised  their right to require the
Company to register the Shares which the Selling Shareholders  acquired from the
Company  in  connection  with a merger  by the  Company  and  Entropin,  Inc,  a
California  corporation effective January 15, 1998 ("the Merger Agreement").  In
connection  with the Merger  Agreement,  the Selling  Shareholders  were granted
certain registration rights pursuant to which the Company has agreed to maintain
a current  registration  statement  to permit  public  sales of the Shares for a
period of at least nine  months  from the date of this  Prospectus  or until the
Shares have been sold,  whichever first occurs.  The Company will pay all of the
expenses  incident to the  offering  and sale of the Shares to the public by the
Selling  Shareholders  other than  commissions  and  discounts of  underwriters,
dealers or agents,  if any. Expenses to be paid by the Company include legal and
accounting fees in connection with the preparation of the Registration Statement
of  which  this  Prospectus  is a  part,  legal  fees  in  connection  with  the
qualification  of the  sale of the  Shares  under  the laws of  certain  states,
registration and filing fees, printing expenses, and other expenses. The Company
will  not  receive  any  proceeds  from the sale of the  Shares  by the  Selling
Shareholders.

         The Company anticipates that the Selling Shareholders from time to time
will offer the Shares  through:  (i) dealers or agents or in ordinary  brokerage
transactions;  (ii) direct  sales to  purchasers  or sales  effected  through an
agent;  (iii) privately  negotiated  transactions;  or, (iv) combinations of any
such methods.  The Shares would be sold at market prices  prevailing at the time
of sale or at negotiated  prices.  Dealers and brokers involved in the offer and
sale of the  Shares  may  receive  compensation  in the  form of  discounts  and
commissions.  Such  compensation,  which may be in excess of ordinary  brokerage
commissions,  may be paid by the Selling  Shareholders  and/or the purchasers of
Shares  for whom such  underwriters,  dealers  or agents  may act.  The  Selling
Shareholders and any dealers or agents which  participate in the distribution of
the Shares may be deemed to be  "underwriters"  as defined in the Securities Act

                                      -47-
<PAGE>

of 1933,  as amended  (the "1933  Act") and any profit on the sale of the Shares
and any discounts,  commissions or concessions received by any dealers or agents
might be deemed by the NASD to constitute underwriting compensation.

         If the  Company  is  notified  by the  Selling  Shareholders  that  any
material  arrangement  has been entered into with an underwriter for the sale of
Shares,  a  supplemental  prospectus  will  be  filed  to  disclose  such of the
following information as the Company believes  appropriate:  (i) the name of the
participating  underwriter;  (ii) the number of Shares involved; (iii) the price
at which  such  Shares  are sold;  (iv) the  commissions  paid or  discounts  or
concessions  allowed to such  underwriter;  and, (v) other facts material to the
transaction.

         Sales of Shares in the  over-the-counter  market may be by means of one
or more of the  following:  (i) a block  trade in which a broker or dealer  will
attempt to sell the Shares as agent but may position and resell a portion of the
block as principal to facilitate the transaction;  (ii) purchases by a dealer as
principal and resale by such dealer for its account pursuant to this Prospectus;
and, (iii) ordinary brokerage  transactions and transactions in which the broker
solicits  purchasers.  In  effecting  sales,  brokers or dealers  engaged by the
Selling Shareholders may arrange for other brokers or dealers to participate.

         The Company is unable to predict  the effect  which sales of the Shares
by the Selling  Shareholders  might have upon the market price of the  Company's
Common Stock or the Company's ability to raise further capital.

                                  LEGAL MATTERS

         Legal matters in connection  with the Shares being offered  hereby have
been passed on for the Company by the law firm of Brenman  Bromberg & Tenenbaum,
P.C.,  Denver,  Colorado.  Members of the firm of Brenman  Bromberg & Tenenbaum,
P.C. own 52,274 Shares of the Company's Common Stock.

                                     EXPERTS

          The  statements  of operations  data for the years ended  December 31,
1997 and 1996,  and for the period from August 27, 1984  (inception) to December
31, 1997,  included in this  Prospectus  and  Registration  Statement  have been
audited by Causey  Demgen & Moore Inc.,  independent  auditors,  as set forth in
their report thereon appearing  elsewhere  herein,  and are included in reliance
upon such report given upon the  authority of such firm as experts in accounting
and auditing.

                         SHARES ELIGIBLE FOR FUTURE SALE

         The Company presently has outstanding 6,000,051 shares of Common Stock.
All  of  the  Shares  registered  hereunder  can  be  resold  pursuant  to  this
Prospectus. However, the Company has entered into an agreement with its officers
and directors and major shareholders pursuant to which 4,748,388 Shares owned by

                                      -48-
<PAGE>

such persons may be sold only as the Company may permit for a period of one year
from the date of this  Prospectus.  The  Shareholders  Agreement  was entered in
anticipation  that potential  funding  sources at times may require or request a
restriction  on disposition  of securities  owned by a company's  management and
major shareholders. (See The Company and Selling Security Holders.) In the event
the Shares are not sold under this  Prospectus,  the Shares  remain  "restricted
securities" as that term is defined in Rule 144 promulgated under the Securities
Act. In general,  under Rule 144, as currently in effect, any person (or persons
whose shares are aggregated),  including persons deemed to be affiliates,  whose
restricted  securities  have been  fully paid for and held for at least one year
from the later of the date of payment  therefor  to the  Company or  acquisition
thereof from an affiliate,  may sell such securities in brokers' transactions or
directly to market makers,  provided that the number of shares sold in any three
month  period may not exceed the  greater of 1% of the then  outstanding  Common
Stock or the average  weekly  trading volume of the Common Stock during the four
calendar  weeks  preceding  such sale.  Sales under Rule 144 are also subject to
certain notice  requirements and the availability of current public  information
about the  Company.  After two years have elapsed from the later of the issuance
of restricted  securities by the Company or their acquisition from an affiliate,
such securities may be sold without limitation by persons who are not affiliates
under Rule 144.

         Sales of  substantial  amounts of Common Stock by  shareholders  of the
Company under Rule 144 or otherwise,  or even the potential for such sales,  are
likely to have a  depressive  effect on the market price of the shares of Common
Stock and  Warrants  and could  impair the  Company's  ability to raise  capital
through the sale of its equity securities. See Risk Factors.

                             ADDITIONAL INFORMATION

         The Company has filed a Registration Statement under the Securities Act
of 1933,  as amended  with  respect to the  securities  offered  hereby with the
United States  Securities  and Exchange  Commission  ("SEC"),  450 Fifth Street,
N.W.,  Washington,  D.C.  20549.  This  Prospectus,  which  is  a  part  of  the
Registration Statement, does not contain all of the information contained in the
Registration Statement and the exhibits and schedules thereto,  certain items of
which are omitted in accordance  with the rules and  regulations of the SEC. For
further  information  with  respect to the  Company and the  securities  offered
hereby, reference is made to the Registration Statement,  including all exhibits
and  schedules  therein,  which may be  examined at the SEC's  Washington,  D.C.
office, 450 Fifth Street, N.W., Washington, D.C. 20549 without charge, or copies
of which may be obtained from the SEC upon request and payment of the prescribed
fee.  Statements  made in this  Prospectus  as to the contents of any  contract,
agreement  or  document  are not  necessarily  complete,  and in  each  instance
reference  is made to the copy of such  contract,  agreement  or other  document
filed as an exhibit to the  Registration  Statement,  and each such statement is
qualified in its entirety by such reference.  The Company is a reporting company
under  the  Securities  Exchange  Act of 1934,  as  amended,  and in  accordance
therewith  in the future will file reports and other  information  with the SEC.
All of such reports and other  information  may be  inspected  and copied at the
public reference facilities maintained by the SEC at the address set forth above
in  Washington,  D.C.  and at  regional  offices of the SEC  located at 500 West
Madison Street,  Suite 1400,  Chicago,  Illinois 60661 and 7 World Trade Center,

                                      -49-
<PAGE>

Suite  1300,  New York,  New York 10048.  In  addition,  the Company  intends to
provide  its  shareholders  with annual  reports,  including  audited  financial
statements,  unaudited interim reports and such other reports as the Company may
determine necessary.  The SEC maintains a Web site that contains reports,  proxy
and information  statements and other  information  regarding  issuers that file
electronically with the SEC at http://www.secgov.

                                    GLOSSARY

"ESTEROM(R)"  means the product  employed in  Entropin's  Phase II studies which
contains benzoylecgonine, ecgonine, ecgonidine and their 2-hydroxypropyl esters.

"ESTEROM   RELATED   COMPOUNDS"   means  the   compounds  of  formulas  and  the
pharmaceutical  compositions  containing those compounds,  or mixtures  thereof,
identified and/or claimed under Entropin's Licensed Patents.

"DEA" means the Drug Enforcement Administration.

"FDA" means the United States Food and Drug Administration.

"IND" means an Investigational New Drug application filed with the FDA.

"NDA" means a New Drug Application filed with the FDA.

"RANGE OF  MOTION"  for a  shoulder  may be  defined as the number of degrees to
which  the  patient  may move the arm from the side in a  forward,  backward  or
upward direction.

"GMP" means Good Manufacturing  Practices which are regulations  enforced by the
FDA through its facilities inspection program.



                                      -50-

<PAGE>
                                           INDEX TO FINANCIAL STATEMENTS
                                           -----------------------------

                                                   ENTROPIN, INC.


<S>
AUDITED FINANCIAL STATEMENTS FOR THE YEARS ENDED DECEMBER 31, 1996 AND 1997:
- ---------------------------------------------------------------------------
                                                                                                                  <C>
     Report of Causey Demgen & Moore Inc. Independent Certified Public Accountants..............................  F-2

     Balance Sheets As of December 31, 1996 and 1997............................................................  F-3

     Statements of Operations
         For Years Ended  December  31,  1996 and 1997,  and for the Period from August 27, 1984
         (Inception) Through December 31, 1997..................................................................  F-4
   
     Statements of Changes in Stockholders' Equity (Deficit)
         For the Period from August 27, 1984 (Inception) Through December 31, 1997..............................  F-5
    
     Statements of Cash Flows
         For Years Ended December 31, 1996 and 1997, and for the Period from August 27, 1984
         (Inception) Through December 31, 1997..................................................................  F-6

     Notes to Financial Statements
         December 31, 1996 and 1997.............................................................................  F-8
   
UNAUDITED FINANCIAL STATEMENTS FOR THE THREE MONTHS AND SIX MONTHS ENDED JUNE 30, 1998:
- --------------------------------------------------------------------------------------

     Balance Sheet - December 31, 1997 and June 30, 1998 (unaudited)............................................  F-19

     Statement of Operations for the Three Months ended June 30, 1997 and 1998..................................  F-21

     Statement of Operations for the Six Months ended June 30, 1997 and 1998 and for the Period from
          August 27, 1984 (inception) to June 30, 1998 (unaudited)..............................................  F-22

     Statement of Changes in Stockholders' Equity (Deficit) for the Six Months Ended June 30, 1998 (unaudited)..  F-23

     Statement of Cash Flows for the Six Months Ended June 30, 1997 and 1998 and for the Period from
          August 27, 1984 (inception) to June 30, 1998 (unaudited)..............................................  F-24

     Notes to Unaudited Financial Statements - June 30, 1998....................................................  F-25 
    
</TABLE>

                                                        F-1

<PAGE>

               REPORT OF INDEPENDENT CERTIFIED PUBLIC ACCOUNTANTS



The Board of Directors and Stockholders
Entropin, Inc.


We have audited the accompanying balance sheet of Entropin,  Inc. (a development
stage company) as of December 31, 1996 and 1997,  and the related  statements of
operations,  changes in  stockholders'  equity  (deficit) and cash flows for the
years then ended and for the period  from August 27,  1984  (inception)  through
December 31, 1997.  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 audits 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 financial  statements  referred to above present fairly, in
all material respects,  the financial position of Entropin,  Inc. as of December
31, 1996 and 1997 and the results of its  operations  and its cash flows for the
years then ended and for the period  from August 27,  1984  (inception)  through
December 31, 1997, in conformity with generally accepted accounting principles.

As  discussed in Note 10 to the  financial  statements,  the Company  determined
during the  current  year that the fair value of common  shares  contributed  in
December  1997  by  certain  shareholders  of the  Company  were  under  valued.
Accordingly,  the December 31, 1997 financial  statements  have been restated to
reflect the re-valuation.

Denver, Colorado
February 22, 1998, except
for Note 9, as to which the
date is March 19, 1998 and
Note 10, as to which the date
is August 12, 1998                         CAUSEY DEMGEN & MOORE INC.


                                     F-2


<PAGE>
                                 ENTROPIN, INC.
                         (A DEVELOPMENT STAGE COMPANY)

                                 BALANCE SHEET

                           December 31, 1996 and 1997

                                     ASSETS
                                     ------
                                                          1996         1997
                                                          ----         ----
Current assets:
   Cash                                                $    1,677   $      291
   Accounts receivable - stockholder (Note 2)               5,000        5,000
                                                       ----------   ----------
     Total current assets                                   6,677        5,291

Deferred stock offering costs (Notes 4 and 8)                   -       10,746

Patent costs, less accumulated amortization of
   $22,300 (1996) and $40,300 (1997)                      218,326      266,456
                                                       ----------   ----------
                                                       $  225,003   $  282,493
                                                       ==========   ==========

                 LIABILITIES AND STOCKHOLDERS' EQUITY (DEFICIT)
                 ----------------------------------------------

Current liabilities:
   Accounts payable                                    $  148,557   $  329,813
   Advances - stockholders (Note 2)                        21,036       98,873
                                                       ----------   ----------
     Total current liabilities                            169,593      428,686

Long-term debt:
   Stockholders (Note 2)                                1,601,697    1,710,487
   Deferred royalty agreement (Note 6)                    111,440      155,495
   Compensation agreement (Note 6)                      1,430,000    1,500,000
                                                       ----------   ----------
     Total long-term debt                               3,143,137    3,365,982

Commitments and contingencies (Notes 6 and 8)

Series A redeemable preferred stock, $.001 par value,
   3,210,487 shares authorized, no shares issued
   and outstanding (Notes 3 and 8)                              -            -

Stockholders' equity (deficit) (Notes 4 and 8):
   Preferred stock, $.001 par value; 10,000,000 shares
     authorized, Series A reported above (Note 3)               -            -
   Common stock, $.001 par value; 50,000,000
     shares authorized, 5,220,000 shares issued
     and outstanding                                        5,220        5,220
   Additional paid-in capital                             369,780    1,296,780
   Deficit accumulated during the development stage    (3,462,727)  (4,814,175)
                                                       ----------   ----------
     Total stockholders' equity (deficit)              (3,087,727)  (3,512,175)
                                                       ----------   ----------
                                                       $  225,003   $  282,493
                                                       ==========   ==========


                            See accompanying notes.
                                      F-3

<PAGE>
                                 ENTROPIN, INC.
                         (A DEVELOPMENT STAGE COMPANY)

                            STATEMENT OF OPERATIONS

                 For the Years Ended December 31, 1996 and 1997
    and for the Period from August 27, 1984 (inception) to December 31, 1997


                                                                   Cumulative
                                                                  amounts from
                                             1996         1997      inception
                                             ----         ----    ------------

Costs and expenses:
   Research and development                $ 167,818  $   877,209  $ 3,946,854
   General and administrative                101,894      328,853      570,255
   Depreciation and amortization              10,550       18,000       57,368
                                           ---------  -----------  -----------
     Operating loss                         (280,262)  (1,224,062)  (4,574,477)

Other income (expense):
   Interest expense                          (94,876)    (127,386)    (239,698)
                                           ---------  -----------  -----------

Net loss (Note 10)                         $(375,138) $(1,351,448) $(4,814,175)
                                           =========  ===========  ===========
Basic net loss per common share (Note 5)   $    (.07) $      (.26) $      (.92)
                                           =========  ===========  ===========



                            See accompanying notes.
                                      F-4
<PAGE>
<TABLE>
<CAPTION>
                                                 ENTROPIN, INC.
                                         (A DEVELOPMENT STAGE COMPANY)

                             STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY (DEFICIT)

                      For the Period from August 27, 1984 (inception) to December 31, 1997
                                                                                                            Deficit
                                                                                                           accumulated
                                                           Common Stock       Additional                   during the
                                                        ------------------      paid-in       Stock        development
                                                        Shares      Amount     capital    subscriptions       stage
                                                        ------      ------    ----------  -------------    ------------
<S>                                                    <C>          <C>      <C>            <C>           <C>
Balance at August 27, 1984 (inception)                         -    $    -   $        -     $      -      $         -

   Sale of common stock for cash
     in 1984 ($.005 per share)                           991,800       992        4,008            -                -

   Issuance of common stock in exchange for
      services in 1991 ($.005 per share)               3,967,198     3,967       16,033            -                -

   Cash contribution from shareholder in 1991                  -         -       50,000            -                -

   Net loss for the period from inception through
     December 31, 1994                                         -         -            -            -       (2,824,221)
                                                       ---------    ------   ----------     --------      -----------
Balance, December 31, 1994                             4,958,998     4,959       70,041            -       (2,824,221)

   Cash received for common  stock subscription                -         -            -      150,000                -

   Net loss for the year                                       -         -            -            -         (263,368)
                                                       ---------    ------   ----------     --------      -----------
Balance, December 31, 1995                             4,958,998     4,959       70,041      150,000       (3,087,589)

   Sale of common stock for cash ($1.15 per share)       261,002       261      299,739     (150,000)               -

   Net loss for the year                                       -         -            -            -         (375,138)
                                                       ---------    ------   ----------     --------      -----------
Balance, December 31, 1996                             5,220,000     5,220      369,780            -       (3,462,727)

   Capital contributions (Note 4 and 10)                       -         -      927,000            -                -

   Net loss for the year (Note 10)                             -         -            -            -       (1,351,448)
                                                       ---------    ------   ----------     --------      -----------
Balance, December 31, 1997                             5,220,000    $5,220   $1,296,780     $      -      $(4,814,175)
                                                       =========    ======   ==========     ========      ===========
</TABLE>
                                                    See accompanying notes.
                                                              F-5
<PAGE>
                                 ENTROPIN, INC.
                          (A DEVELOPMENT STAGE COMPANY)

                             STATEMENT OF CASH FLOWS

                 For the Years Ended December 31, 1996 and 1997
    and for the Period from August 27, 1984 (inception) to December 31, 1997

                                                                     Cumulative
                                                                      amounts
                                                                       from
                                              1996         1997      inception
                                              ----         ----      ---------
Cash flows from operating activities:
   Net loss                                 $(375,138) $(1,351,448) $(4,814,175)
   Adjustments to reconcile net loss to
     net cash used in operating
     activities:
      Depreciation and amortization            10,550       18,000       57,368
      IBC partner royalty agreement                 -       44,055      155,495
      Services contributed in exchange
        for stock                                   -      927,000      947,000
      Services contributed in exchange for
        compensation agreements               110,000       70,000    2,231,678
      Increase in accounts receivable -
        shareholder                                 -            -       (5,000)
      Increase in accounts payable             33,418      181,256      329,813
      Increase in accrued interest             60,341      108,790      169,139
      Other                                         -           -           131
                                            ---------  -----------  -----------
      Total adjustments                       214,309    1,349,101    3,885,624
                                            ---------  -----------  -----------
      Net cash used in operations            (160,829)      (2,347)    (928,551)

Cash flows from investing activities:
   Purchase of equipment                            -            -      (17,207)
   Patent costs                               (54,564)     (66,130)    (306,756)
                                            ---------  -----------  -----------
      Net cash used in investing activities   (54,564)     (66,130)    (323,963)

Cash flows from financing activities:
   Deferred stock offering costs                    -      (10,746)     (10,746)
   Proceeds from sale of common stock         150,000            -      355,000
   Proceeds from stockholder loans             19,972            -      809,678
   Proceeds from stockholder advances          21,035       77,837       98,873
                                            ---------  -----------  -----------
      Net cash provided by financing
         activities                           191,007       67,091    1,252,805
                                            ---------  -----------  -----------
Net increase (decrease) in cash               (24,386)      (1,386)         291

Cash at beginning of period                    26,063        1,677            -
                                            ---------  -----------  -----------
Cash at end of period                       $   1,677  $       291  $       291
                                            =========  ===========  ===========

                         (Continued on following page)
                            See accompanying notes.
                                      F-6
<PAGE>

                                 ENTROPIN, INC.
                          (A DEVELOPMENT STAGE COMPANY)

                             STATEMENT OF CASH FLOWS

           For the years ended December 31, 1996 and 1997 and for the
          Period from August 27, 1984 (inception) to December 31, 1997




                         (Continued from preceding page)

Supplemental disclosure of cash flow information:

                                                               Cumulative
                                                                 amounts
                                                                 from
                              1996              1997           inception
                              ----              ----           ---------

Cash paid during period
for interest                $6,372            $15,598           $59,855


Supplemental disclosure of non-cash financing activities:

During 1996, the Company  entered into a compensation  agreement with the spouse
of a shareholder for $731,678 in exchange for services performed for the Company
in prior years (see Note 2).

Pursuant to an agreement with an IBC limited partner,  the Company has accrued a
liability  totaling  $155,495 at December 31, 1997 for advance  royalties due to
the individual (see Note 6).

In November of 1997,  the Company  reached an agreement  with an  individual  to
enter into a compensation  agreement in exchange for services the individual has
provided the Company since  inception  (see Note 6). The Company has reflected a
liability of $1,430,000 and $1,500,000 in 1996 and 1997,  respectively,  related
to this agreement.



                            See accompanying notes.
                                     F-7


<PAGE>
                                 ENTROPIN, INC.
                         (A DEVELOPMENT STAGE COMPANY)

                         NOTES TO FINANCIAL STATEMENTS

                           December 31, 1996 and 1997


1.   Organization and summary of significant accounting policies
     -----------------------------------------------------------

     Organization:

     Entropin, Inc., a Colorado corporation,  was organized in August 1984, as a
     pharmaceutical research company developing Esterom(R),  a topically applied
     compound for the  treatment  of impaired  range of motion  associated  with
     acute  lower  back  sprain  and acute  painful  shoulder.  The  Company  is
     considered  to be a development  stage  enterprise as more fully defined in
     Statement No. 7 of the Financial  Accounting  Standards  Board.  Activities
     from inception  include  research and development  activities,  seeking the
     U.S. Food and Drug Administration (FDA) approval for Esterom(R), as well as
     fund raising.

     Basis of presentation and management's plans:

     The Company's  financial  statements have been presented on a going concern
     basis which  contemplates the realization of assets and the satisfaction of
     liabilities  in the  normal  course  of  business.  The  Company  is in the
     development  stage  and  has  been  primarily   involved  in  research  and
     development  activities.  This has  resulted  in significant  losses and an
     accumulated  deficit at  December 31, 1997  of  $4,814,175.  The  Company's
     continued  existence is  dependent on its ability to obtain the  additional
     funding  necessary to complete the FDA approval  process for Esterom(R) and
     market the product.

     As  described in Note 8, the Company has  successfully  completed a private
     placement  and  a  recapitalization  of  the  Company  which  will  provide
     additional  liquidity for the Company for current operations.  However, the
     Company  estimates it will require  additional  funding of up to $8,000,000
     over the  next  three  years  to  successfully  complete  the FDA  approval
     process. The financial statements do not include any adjustment relating to
     the  recoverability  and  classification  of recorded  asset amounts or the
     amount and classification of liabilities or other adjustments that might be
     necessary  should the Company be unable to  continue as a going  concern in
     its present form.

     Use of estimates:

     The  preparation  of financial  statements  in  conformity  with  generally
     accepted  accounting  principles  requires management to make estimates and
     assumptions  that affect the reported amounts of assets and liabilities and
     disclosure  of  contingent  assets  and  liabilities  at  the  date  of the
     financial  statements  and the  reported  amounts of revenues  and expenses
     during  the  reporting  period.  Actual  results  could  differ  from those
     estimates.

     Income Taxes:

     The  Company  has  elected  under the  Internal  Revenue  Code to be an 'S'
     corporation.  In lieu of corporation  income taxes,  the shareholders of an
     'S' corporation include their respective shares of the Company's net income
     or loss in their individual income tax returns.

                                      F-8

<PAGE>
                                 ENTROPIN, INC.
                         (A DEVELOPMENT STAGE COMPANY)

                         NOTES TO FINANCIAL STATEMENTS

                           December 31, 1996 and 1997

1.   Organization and summary of significant accounting policies (continued)
     -----------------------------------------------------------------------

     Deferred stock offering costs:

     Deferred  stock  offering  costs  represent  costs incurred to December 31,
     1997, in connection with the private  placement of common stock, more fully
     discussed in Note 6. Costs  incurred as of December 31, 1997 and additional
     costs incurred  subsequent to that date,  were charged against the proceeds
     of the offering.

     Patents:

     Patents  are  stated  at  cost  less  accumulated   amortization  which  is
     calculated  on a  straight-line  basis over the useful lives of the assets,
     estimated by management to average 17 years. Research and development costs
     and any  costs  associated  with  internally  developed  patents  (with the
     exception of legal costs) are expensed in the year incurred.

     Impairment of long-lived assets:

     The Company  evaluates  the potential  impairment  of long-lived  assets in
     accordance  with  Statement  of  Financial  Accounting  Standards  No. 121,
     Accounting  for the  Impairment  of  Long-Lived  Assets and for  Long-Lived
     Assets to be  Disposed  of.  The  Company  annually  reviews  the amount of
     recorded long-lived assets for impairment.  If the sum of the expected cash
     flows from these assets is less than the carrying amount,  the Company will
     recognize an impairment loss in such period.

     Cash equivalents:

     For the purposes of the statement of cash flows, the Company  considers all
     highly liquid debt instruments purchased with a maturity of three months or
     less to be cash equivalents.

     Concentrations of credit risk:

     Financial   instruments   which   potentially   subject   the   Company  to
     concentrations  of credit risk  consist  principally  of cash.  The Company
     places its cash with high quality financial  institutions.  At times during
     the years,  the balance at any one  financial  institution  may exceed FDIC
     limits.

     Reclassifications:

     Certain  reclassifications  have been made to the 1996 financial statements
     to conform to the 1997 financial statement presentation.


                                      F-9
<PAGE>
                                 ENTROPIN, INC.
                         (A DEVELOPMENT STAGE COMPANY)

                         NOTES TO FINANCIAL STATEMENTS

                           December 31, 1996 and 1997


2.   Related party transactions
     --------------------------

     Office Space:

     The Company  presently uses part of an office  facility and  administrative
     services provided by a director and stockholder of the Company at no cost.

     Accounts receivable - stockholder:

     During 1994, the Company advanced $5,000 to a stockholder. The advance does
     not bear interest and is due on demand.  The Company expects the advance to
     be paid in full.

     Advances - stockholders:

     During 1996 and 1997, the Company was advanced an aggregate of $83,873 by a
     stockholder from the  stockholder's  personal line of credit.  The advances
     are non-interest bearing and due on demand.

     During 1997,  the Company  received  advances from a  stockholder  totaling
     $15,000. The advances do not bear interest and are payable upon demand. The
     stockholders'  advances  have been  repaid  from  proceeds  of the  private
     placement on January 22, 1998 (see Note 4).

     Long-term debt - stockholders:

     Long-term  debt -  stockholders  consisted of the following at December 31,
     1996 and 1997:
<TABLE>
<CAPTION>
                                                                      1996        1997
                                                                      ----        ----
     <S>                                                          <C>           <C>
     8% Note payable - stockholder, issued for cash advances,
         principal plus accrued interest due December 31,
         2000, unsecured                                          $  631,678    $  631,678

     8% Note payable - stockholder, issued for cash advances,
         principal plus accrued interest due December 31,
         2000, unsecured                                             178,000       178,000

     8% Note  payable -  stockholder, issued for past services,
         principal plus accrued interest due December 31,
         2000, unsecured                                             731,678       731,678

     Accrued interest payable                                         60,341       169,131
                                                                  ----------    ----------
                                                                  $1,601,697    $1,710,487
                                                                  ==========    ==========
</TABLE>

       As  described  in Note 6,  effective  January 15,  1998,  all above noted
   long-term debt plus accrued interest was converted to 1,710,487 shares of the
   Company's redeemable 8% non-voting,  non-cumulative  Series A Preferred Stock
   at $1 per share,  for a total of  $1,720,487  which  represents  the recorded
   amount of the  liability  at December  31,  1997 and fair value of  preferred
   stock issued.

                                      F-10
<PAGE>
                                 ENTROPIN, INC.
                         (A DEVELOPMENT STAGE COMPANY)

                         NOTES TO FINANCIAL STATEMENTS

                           December 31, 1996 and 1997

3.   Redeemable preferred stock
     --------------------------

     In December  1997,  the Board of  Directors  approved an  amendment  to the
     Articles of Incorporation to authorize 10,000,000 shares of $.001 par value
     preferred  stock.  3,210,487  shares of the Company's  preferred stock were
     designated as redeemable, non-voting,  non-cumulative 8% Series A Preferred
     Stock (see Note 8). The annual 8%  dividend is based upon a $1.00 per share
     value, and is only payable out of earnings.

     The Series A Preferred Stock will be subject to mandatory  redemption.  The
     funds available for redemption will be equal to more than 20% but less than
     50% of annual earnings,  as determined  annually by the Board of Directors,
     but not exceeding cash flow from operations and will  automatically  cancel
     in seven years if not fully redeemed.  The Company may  voluntarily  redeem
     outstanding shares of preferred stock at $1 per share.

4.   Stockholders' equity
     --------------------

     Buy-sell agreement:

     On August 11, 1993, the Company entered into a buy-sell  agreement with the
     existing stockholders which, among other provisions,  requires stockholders
     desiring  to sell or  transfer  shares to a person or entity  other than an
     immediate  family member to first submit a proposal of the sale or transfer
     and its terms to the  Company.  Pursuant to the  agreement,  the Company is
     entitled to a first right  option to purchase  some or all of the shares on
     the terms and price  offered to the buyer after  which,  subject to certain
     provisions,  all  other  individual  shareholders  may  then  purchase  any
     remaining shares not purchased by the Company.  The buy-sell  agreement was
     cancelled January 15, 1998.

     Authorized capital:

     Pursuant  to the  recapitalization  more  fully  described  in  Note  8, in
     December 1997, the Board of Directors approved an amendment to the Articles
     of  Incorporation  to increase  the  authorized  common  stock to 7,000,000
     shares and to establish its par value at $.001 per share.

     Stock split:

     On December 10,  1997,  the Board of  Directors  approved a  198.36-for-one
     stock split.  Accordingly,  all  references to common shares  including the
     number of shares (except shares authorized),  stock option data, additional
     paid-in capital, and per share information have been retroactively restated
     to reflect the stock  split,  which  presentation  is  consistent  with the
     recapitalization of the Company (see Note 8).


                                      F-11

<PAGE>
                                 ENTROPIN, INC.
                         (A DEVELOPMENT STAGE COMPANY)

                         NOTES TO FINANCIAL STATEMENTS

                           December 31, 1996 and 1997

4.   Stockholders' equity (continued)
     --------------------------------

     Private placement:

     As of December 31, 1997,  the Company had commenced a private  placement of
     30 units  (10,000  shares of its $.001 par value  common stock per unit) at
     $27,500 per unit,  $2.75 per share,  which  closed on January 15, 1998 with
     gross proceeds of $825,000 (see Note 8).

     Capital contributions:

     In December 1997, certain shareholders of the Company contributed a portion
     of their  common stock to an  individual  providing  business  advisory and
     legal services to the Company (78,300 shares valued at $215,000) and to the
     Chairman of the  Pharmaceutical  Sciences  Department  of a  university  as
     partial  settlement for research and development  services  (259,042 shares
     valued at $712,000).  The  transactions  were  accounted for based upon the
     fair value of the common shares contributed, approximately $2.75 per share.
     The expense and related capital contributions are reflected at December 31,
     1997.

5.   Basic net loss per share
     ------------------------

     Basic net loss per share is based on the weighted  average number of shares
     outstanding during the periods, 5,220,000 shares. Shares issued for nominal
     consideration are considered outstanding since inception.  Diluted loss per
     share has not been presented as exercise of the  outstanding  stock options
     would have an anti-dilative effect.

6.   Commitments and contingencies
     -----------------------------

     Compensation agreements:

     In 1993,  the Company  entered into a 30 year  compensation  agreement with
     I.B.C.  limited  partners  owning  64.28% of the limited  partnership.  The
     I.B.C.  Limited  Partnership  participated  in  the  early  development  of
     Estrom(R)  (the  medicine) and owned the patent rights to three patents and
     all  intellectual  property rights.  Under the terms of the Agreement,  the
     Company  acquired  all of the patent and  intellectual  property  rights in
     exchange  for  certain  compensation  to the  limited  partners,  which  is
     dependent upon the Company's receipt of a marketing partners  technological
     access  fee  and  royalty   payments.   The  partnership  was  subsequently
     dissolved.  Compensation  under the  agreement  includes a bonus payment of
     $96,420 to be paid at the time the Company is  reimbursed by a drug company
     for past expenses paid for  development of the medicine,  as well as 64.28%
     of a decreasing  payment  rate (3% to 1%) on  cumulative  annual  royalties
     received by the Company.  As of December 31, 1996 and 1997, no  liabilities
     have been accrued with respect to this agreement.


                                      F-12
<PAGE>
                                 ENTROPIN, INC.
                         (A DEVELOPMENT STAGE COMPANY)

                         NOTES TO FINANCIAL STATEMENTS

                           December 31, 1996 and 1997

6.   Commitments and contingencies (continued)
     -----------------------------------------

     In a separate agreement with a former I.B.C.  limited partner,  the Company
     has agreed to pay the partner 35.72% of a decreasing  earned payment (3% to
     1% on cumulative annual sales of products by the Company) until October 10,
     2004.  From October 10, 2004 until  October 10, 2014,  the Company will pay
     the partner 17.86% of the earned payment. In accordance with the agreement,
     the  Company  has agreed to pay the former  limited  partner  the amount of
     $40,000  and a minimum  earned  payment  of  $3,572  per  calendar  quarter
     beginning  on  December  1,  1989.  Such  minimum  earned  payment is to be
     evidenced  by a  promissory  note issued each  quarter and payable when the
     Company is either  reimbursed for expenses paid for the  development of the
     medicine or from the first income  received from the Company from net sales
     of the  medicine.  The  quarterly  payments  are to be applied  against the
     earned  payment to be received by the limited  partner.  As of December 31,
     1996, and 1997, the total liability  accrued with respect to this agreement
     totaled $111,440 and $155,495, respectively.

     Consulting Agreement:

     On March 12, 1996, the Company  entered into a Consulting  Agreement with a
     firm  whereby the  Company has to pay the firm up to a $50,000  success fee
     concurrent  with the  Company's  signing of any  agreement  establishing  a
     corporate partnership,  product license, or any other agreement relating to
     the marketing of the medicine.  As of December 31, 1997 50% of this fee had
     been earned and $25,000 had been recorded as a liability and expense.

     Development of New Products Agreement:

     On January 26, 1987, the Company entered into a Development of New Products
     Agreement  with  a  university  whereby  the  university  provides  various
     services  including  research and development,  product  formulations,  and
     clinical supply for the Company relating to its development of the medicine
     on a project by project basis.  Prior to the  commencement of each project,
     the Company and the university will mutually agree on the nature, type, and
     timing of each special  project as well as the terms of compensation to the
     university.  Under the agreement, the university is required to disclose to
     the Company all inventions,  discoveries, or improvements conceived or made
     by the  university  and has  agreed  to  assign  all its  interests  to the
     Company.


                                      F-13


<PAGE>
                                 ENTROPIN, INC.
                         (A DEVELOPMENT STAGE COMPANY)

                         NOTES TO FINANCIAL STATEMENTS

                           December 31, 1996 and 1997

6.   Commitments and contingencies (continued)
     -----------------------------------------

     Compensation Agreement:

     During  November  1997,  the Company began  negotiating  with an individual
     regarding compensation for research and development services provided since
     the inception of the Company.  In exchange for these services,  the Company
     agreed  to issue an 8% note  payable  to the  individual  in the  principal
     amount of $1,500,000  maturing  December 31, 2000.  The Company has accrued
     related costs of $1,430,000 as of December 31, 1996, and accrued additional
     liability of $70,000 during the year ended December 31, 1997. Subsequent to
     year end, the Company  converted this obligation to 1,500,000 shares of its
     non-voting,  non-cumulative redeemable 8% Series "A" preferred stock, at $1
     per share,  which was considered to be fair value of the services  received
     by the Company (see Note 8). In addition, effective December 15, 1997 three
     stockholders  of the Company  agreed to transfer a portion of their  common
     stock to provide the individual  with  approximately  5% of the outstanding
     common shares (see Note 4).

     Development and Supply Agreements:

     On January 1, 1997, the Company entered into 10 year Development and Supply
     Agreements  with  Mallinckrodt,  Inc.  to  develop  all of  the  chemistry,
     manufacturing  and controls to comply with the drug master file of the Food
     and Drug  Administration  as well as supply  the bulk  active  product  for
     marketing.  In  exchange  for these  services,  Mallinckrodt  will  receive
     exclusive rights as a supplier of the bulk active product to the Company in
     North  America.  For the first year ended  December 31, 1997,  the contract
     price of the ingredient will be fixed based on the number of liters ordered
     by the Company. Subsequent to December 31, 1997, the cost per liter will be
     adjusted based on changes in the price of the components in the bulk active
     product.

     In  addition,   pursuant  to  the   agreement,   the  Company  has  granted
     Mallinckrodt a right of first refusal to supply the Company's  requirements
     of the bulk active product in all other parts of the world outside of North
     America.

     Management advisory services agreement:

     On October 28, 1997,  the Company  entered into a 3-year  agreement with an
     organization  providing  management  advisory services to the Company.  The
     organization provides assistance in developing and implementing a strategic
     plan of merger or  acquisition  and for  business and  financial  community
     relations.  The agreement provides compensation,  for arranging a merger or
     acquisition acceptable to the Company,  through the issuance of two options
     to  acquire  180,001  shares  of the  Company's  common  stock for $100 and
     $504,000,  respectively,  simultaneous  with the closing of the merger (see
     Note 8). The options are exercisable for a five-year  period.  In addition,
     the organization received registration rights for the shares underlying the
     options.  The  difference  between  the  fair  value of the  stock  and the
     exercise  price  will be  treated  as  additional  costs of the  merger and
     charged to capital.

                                      F-14
<PAGE>
                                 ENTROPIN, INC.
                         (A DEVELOPMENT STAGE COMPANY)

                         NOTES TO FINANCIAL STATEMENTS

                           December 31, 1996 and 1997

7.   Financial instruments
     ---------------------

     The  carrying  values of cash,  accounts  receivable-shareholder,  accounts
     payable  and  advances-shareholders  approximated  fair  value  due  to the
     short-term maturities of these instruments.

     The Company  believes  that it is not  practical  to estimate a fair market
     value different from the carrying value of long-term debt.  Long-term debt,
     excluding the deferred  royalty  agreement,  was converted into  redeemable
     preferred  stock on January 15, 1998.  Both the redeemable  preferred stock
     and the deferred royalty  agreement have numerous  features unique to these
     securities and agreements as described in Notes 3 and 6.

8.   Subsequent events
     -----------------

     Recapitalization:

     On December 9, 1997,  the Company  entered  into an  agreement  and plan of
     merger with Vanden  Capital  Group,  Inc.  (Vanden) to exchange  all of the
     issued and  outstanding  common  shares of the  Company,  in  exchange  for
     5,220,000 shares of Vanden's $.001 par value common stock.

     Pursuant to the  agreement,  Vanden  agreed to have cash of $220,000 and no
     unpaid  liabilities at the effective date of the transaction.  The exchange
     was  consummated  on January  15,  1998.  As a condition  precedent  to the
     exchange,  the  Company  successfully  raised  gross  proceeds  of $825,000
     through a private placement of its common stock (see Note 3).

     Following the exchange, the Company's shareholders own approximately 95% of
     the outstanding  common stock of Vanden. The acquisition has been accounted
     for as a  recapitalization  of the  Company  based  upon  historical  cost.
     Accordingly,  the number authorized and issued common shares,  par value of
     common  stock and  additional  paid-in  capital  have been  restated on the
     balance sheet and the statement of stockholders' equity to give retroactive
     effect to the recapitalization.

     Issuance of preferred stock:

     On January 15, 1998,  the Company issued  3,210,487  shares of its Series A
     redeemable non-voting, non-cumulative 8% preferred stock in exchange for an
     aggregate $1,710,487 of notes payable to shareholders and accrued interest,
     and the $1,500,000 compensation agreement (see Notes 2 and 6).

                                      F-15

<PAGE>
                                 ENTROPIN, INC.
                         (A DEVELOPMENT STAGE COMPANY)

                         NOTES TO FINANCIAL STATEMENTS

                           December 31, 1996 and 1997

8.   Subsequent events (continued)
     -----------------------------

     Issuance of common stock:

     In connection with the  recapitalization  effected on January 15, 1998, the
     Company  issued  180,001  shares of its $.001 par value  common stock to an
     unrelated  entity for cash of $100 as required by the  management  advisory
     services  contract (see Note 6). The  difference  between the fair value of
     the stock, estimated by the Company to be $2.75 per share, and the exercise
     price was  treated  as  additional  cost of the  transaction  (merger)  and
     charged to capital,  consistent with accounting for the reverse acquisition
     as a recapitalization.  The net effect of this transaction was to record an
     increase and related decrease to additional paid-in capital of $495,000.

     License agreement:

     In January 1998,  the Company  entered into an agreement with a director of
     the Company, whereby the Company granted the director a non-exclusive right
     to make,  import  and use the  Company's  product,  Esterom(R),  under  the
     Company's   licensed   patents  and  to  use  the  Company's   confidential
     information   to  develop  new  products   that  contain  the  same  active
     ingredients as Esterom(R),  but are formulated  differently.  All rights to
     the improved products will remain the exclusive property of the Company and
     the  director  will  receive a two percent  royalty on the net sales of all
     improved products, and a negotiated royalty on new products. The expiration
     date of this agreement is January 1, 2003.

     Change in tax status:

     The  consummation  of the stock  exchange  with Vanden and the  issuance of
     preferred stock in January 1998,  resulted in a change in the Company's tax
     status from an S corporation  to a taxable  corporation.  The effect of the
     change  would be to provide for income tax based upon  reported  results of
     operations, and to provide deferred tax assets and liabilities on temporary
     differences between reported earnings and taxable income. Since the Company
     has had losses  since  inception,  no change in the  results of  operations
     would  have  occurred,  assuming  the  change  in  status  occurred  at the
     beginning of the periods presented.

     Unaudited pro forma combined balance sheet:

     The following table presents the unaudited pro forma combined balance sheet
     of the  Company  and  Vanden as though  the  combination  had  occurred  on
     December  31,  1997,  giving  effect to the  recapitalization,  the private
     placement and the other subsequent events described above.


                                      F-16


<PAGE>
                                 ENTROPIN, INC.
                         (A DEVELOPMENT STAGE COMPANY)

                         NOTES TO FINANCIAL STATEMENTS

                           December 31, 1996 and 1997

8.   Subsequent events (continued)
     -----------------------------
     Assets:
         Current assets                             $1,034,247
         Other assets                                  266,456
                                                    ----------
                                                    $1,300,703
                                                    ==========
     Liabilities and stockholders' equity:
         Current liabilities                          $428,686
         Other liabilities                             155,495
         Redeemable preferred stock                  3,210,487
         Stockholders' equity (deficit)             (2,493,965)
                                                    ----------
                                                    $1,300,703
                                                    ==========

9.   Proposed management agreement
     -----------------------------

     During March 1998,  the Company has been  negotiating  an agreement  with a
     company  experienced  in managing  pharmaceutical  development  , including
     providing  assistance  in  taking  pharmaceutical  products  to the FDA and
     through the clinical trials and New Drug Application stages of development.
     The  agreement is proposed to have a 33 month term, at the end of which the
     Company's primary product,  Esterom(R),  may be approved for marketing. The
     Company would be required to pay management fees of approximately  $900,000
     over  the term of the  agreement,  as well as grant  stock  options  to the
     company  within  thirty days after  execution of the  agreement to purchase
     450,000  shares of Entropin  common stock.  The options will have a term of
     five years from the grant date and an exercise price of $1.50.  The options
     will be exercisable in varying amounts on dates ranging from August 1998 to
     December 2000.

     The  difference  between the fair value of the options at date of grant and
     the exercise  price,  estimated to be  approximately  $1,950,000  using the
     Black-Scholes option- pricing model, will be recorded as additional paid-in
     capital and unearned stock  compensation.  The unearned stock  compensation
     will be  amortized  to expense on a  straight-line  basis over the 33 month
     term of the agreement.


                                      F-17

<PAGE>

                                 ENTROPIN, INC.
                         (A DEVELOPMENT STAGE COMPANY)

                         NOTES TO FINANCIAL STATEMENTS

                           December 31, 1996 and 1997

10.  Restatement of financial statements
     -----------------------------------

     The Company determined that the fair value of the common shares contributed
     in December 1997 by certain shareholders of the Company for services should
     be approximately $2.75 per share (see Note 4). The services were originally
     recorded at $2.00 per share.  The  accompanying  financial  statements have
     been restated to reflect the revaluation.  The effect of the change for the
     year ended December 31, 1997 is to increase net loss by $253,000,  increase
     net loss per  share by $.05 and  increase  additional  paid-in  capital  by
     $253,000, as follows:

                                     Year ended December 31, 1997
                                  -------------------------------------
                                  As previously reported    As restated     
                                  ----------------------    -----------     

     Net loss                           $(1,098,448)        $(1,351,448)
     Net loss per share                       $(.21)              $(.26) 
     Additional paid-in capital         $ 1,043,780         $ 1,296,780


                                 From Inception Through December 31, 1997
                                 ----------------------------------------
                                  As previously reported    As restated     
                                  ----------------------    -----------

     Net loss                           $(4,561,175)        $(4,814,175)
     Net loss per share                       $(.87)              $(.92)






                                      F-18

<PAGE>
                                 ENTROPIN, INC.
                         (A DEVELOPMENT STAGE COMPANY)

                                 BALANCE SHEET

                      December 31, 1997 and June 30, 1998
                                  (Unaudited)

                                     ASSETS
                                     ------

                                                             1997        1998
                                                             ----        ----  
Current assets:
   Cash                                                    $    291    $138,715
   Accounts receivable - stockholder                          5,000           -
                                                           --------    --------
     Total current assets                                     5,291     138,715

Office equipment, less accumulated depreciation of $282           -       3,945

Other assets:

   Deferred stock offering costs (Note 5)                    10,746           -

   Deposits                                                       -      12,260

   Patent costs, less accumulated amortization of
     $40,300 (1997) and $49,535 (1998)                      266,456     274,131
                                                           --------    --------

      Total other assets                                    277,202     286,391
                                                           --------    --------
                                                           $282,493    $429,051
                                                           ========    ========

                            See accompanying notes.
                                      F-19
<PAGE>

                                 ENTROPIN, INC.
                         (A DEVELOPMENT STAGE COMPANY)

                                 BALANCE SHEET

                      December 31, 1997 and June 30, 1998
                                  (Unaudited)

                 LIABILITIES AND STOCKHOLDERS' EQUITY (DEFICIT)
                 ----------------------------------------------

                                                           1997         1998
                                                           ----         ----
Current liabilities:
   Accounts payable                                    $  329,813   $  104,593
   Advances - stockholders (Note 2)                        98,873           -
                                                       ----------   ----------  
     Total current liabilities                            428,686      104,593

Long-term debt:
   Stockholders (Note 4)                                1,710,487            -
   Deferred royalty agreement (Note 7)                    155,495      162,639
   Compensation agreement (Note 4)                      1,500,000            -
                                                       -----------  ----------  
     Total long-term debt                               3,365,982      162,639

Commitments (Notes 2 and7)

Series A redeemable  preferred  stock,  $.001 par
  value,  3,210,487  shares authorized, 3,210,487 
  shares issued and outstanding (1998) (Note 4)                 -    3,210,487

Series B redeemable convertible preferred stock, 
  $.001 par value, 400,000 shares authorized, no 
  shares issued or outstanding (Note 4)                         -            -

Stockholders' equity (deficit) (Note 5):
   Preferred stock, $.001 par value; 10,000,000 shares
     authorized, Series A and B reported above                  -            -
   Common stock, $.001 par value; 50,000,000 shares
     authorized, 5,220,000 (1997) and 6,000,051 (1998)
     shares issued and outstanding                          5,220        6,000
   Additional paid-in capital                           1,296,780    5,914,210
   Deficit accumulated during the development stage    (4,814,175)  (5,515,015)
   Unearned stock compensation (Notes 5 and 7)                  -   (3,453,863)
                                                       ----------   ----------
     Total stockholders' equity (deficit)              (3,512,175)  (3,048,668)
                                                       ----------   ----------
                                                       $  282,493   $  429,051
                                                       ==========   ==========

                            See accompanying notes.
                                      F-20
<PAGE>
                                 ENTROPIN, INC.
                         (A DEVELOPMENT STAGE COMPANY)

                             STATEMENT OF OPERATIONS

               For the Three Months Ended June 30, 1997 and 1998
                                  (Unaudited)

                                                          1997          1998
                                                          ----          ----

Costs and expenses:
   Research and development                             $ 31,111     $ 250,456
   General and administrative                              7,506       344,387
   Rent - related party (Note 2)                               -         3,120
   Depreciation and amortization                           3,525         5,017
                                                        --------     ---------

     Operating loss                                      (42,142)     (602,980)
                                                        --------     ---------

Other income (expense):
   Interest income                                             -         4,292
   Interest expense                                      (36,612)         (458)
                                                        --------     ---------

     Total other income (expense)                        (36,612)        3,834
                                                       ---------     ---------

Net Loss                                               $ (78,754)    $(599,146)
                                                       =========     =========

Basic loss per common share                            $    (.02)    $    (.10)
                                                       =========     =========

Weighted average common shares
   outstanding (Note 6)                                5,220,000     6,000,000
                                                       =========     =========

                            See accompanying notes.
                                      F-21
<PAGE>
                                 ENTROPIN, INC.
                          (A DEVELOPMENT STAGE COMPANY)

                             STATEMENT OF OPERATIONS

                For the Six Months Ended June 30, 1997 and 1998
      and for the Period from August 27, 1984 (inception) to June 30, 1998
                                  (Unaudited)

                                                                    Cumulative
                                                                  amounts from
                                           1997          1998       inception
                                           ----          ----       ---------

Costs and expenses:
   Research and development               $ 68,956     $ 254,228   $ 4,201,082
   General and administrative               14,104       439,759     1,010,014
   Rent - related party (Note 2)                 -         5,200         5,200
   Depreciation and amortization             7,387         9,517        66,885
                                         ---------     ---------   -----------

     Operating loss                        (90,447)     (708,704)   (5,283,181)
                                         ---------     ---------   -----------

Other income (expense):
   Interest income                               -         8,801         8,801
   Interest expense                        (73,191)         (937)     (240,635)
                                         ---------     ---------   -----------

     Total other income (expense)          (73,191)        7,864      (231,834)
                                         ---------     ---------   -----------

Net Loss                                 $(163,638)    $(700,840)  $(5,515,015)
                                         =========     =========   ===========

Basic loss per common share              $    (.03)    $    (.12)  $     (1.03)
                                         =========     =========   ===========

Weighted average common shares
   outstanding (Note 6)                  5,220,000     5,935,000   5,330,000
                                         =========     =========   =========

                            See accompanying notes.
                                      F-22
<PAGE>
<TABLE>
<CAPTION>
                                 ENTROPIN, INC.
                          (A DEVELOPMENT STAGE COMPANY)

             STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY (DEFICIT)

                     For the Six Months Ended June 30, 1998
                                  (Unaudited)


                                                                                                            Deficit
                                                                                                          accumulated
                                                                            Common stock      Additional  during the     Unearned
                                                                        -------------------     paid-in   development      stock
                                                                        Shares       Amount     capital      stage      compensation
                                                                        ------       ------   ----------  ------------  ------------
<S>                                                                    <C>           <C>      <C>          <C>          <C>
Balance, December 31, 1997,                                           5,220,000     $5,220   $1,296,780   $(4,814,175) $         -
   Sale of common stock for cash  ($2.75 per share)
     (Note 5)                                                            300,000        300      797,810             -            -

   Issuance of common stock pursuant to recapitalization
      (Note 5)                                                           480,051        480      219,620             -            -

   Unearned stock compensation pursuant to issuance
     of common stock options (Note 5)                                          -          -    3,600,000             -   (3,600,000)

   Amortization of unearned stock compensation (Note 5)                        -          -            -             -      146,137

   Net loss for the six months ended June 30, 1998                             -          -            -      (700,840)           -
                                                                       ---------     ------   ----------   -----------  -----------
Balance, June 30, 1998                                                 6,000,051     $6,000   $5,914,210   $(5,515,015) $(3,453,863)
                                                                       =========     ======   ==========   ===========  ===========
</TABLE>

                            See accompanying notes.
                                      F-23
<PAGE>
<TABLE>
<CAPTION>
                                 ENTROPIN, INC.
                          (A DEVELOPMENT STAGE COMPANY)

                             STATEMENT OF CASH FLOWS

                For the Six Months Ended June 30, 1997 and 1998
      and for the Period from August 27, 1984 (inception) to June 30, 1998
                                  (Unaudited)

                                                                               Cumulative
                                                                                 amounts
                                                                                  from
                                                          1997         1998     inception
                                                          ----         ----    ----------  
<S>                                                   <C>          <C>        <C>
Cash flows from operating activities:
   Net loss                                           $(163,638)   $(700,840) $(5,515,015)
   Adjustments to reconcile net loss to net
     cash used in operating activities:
      Depreciation and amortization                       7,387        9,517       66,885
      IBC partner royalty agreement                       9,526        7,144      162,639
                                 
      Services contributed in exchange
        for stock or stock options                            -      146,137    1,093,137
      Services contributed in exchange for
        compensation agreements                          46,666            -    2,231,678
      Decrease in accounts receivable -
        shareholder                                           -        5,000            -
      Increase (decease) in accounts payable              4,683     (225,220)     104,593
      Increase in accrued interest                       64,376            -      169,139
      Other                                                   -            -          131
                                                      ---------    ---------  -----------

      Total adjustments                                 132,638      (57,422)   3,828,202
                                                      ---------    ---------  -----------

      Net cash used in operations                       (31,000)    (758,262)  (1,686,813)

Cash flows from investing activities:
   Purchase of equipment                                      -       (4,227)     (21,434)
   Patent costs                                               -      (16,910)    (323,666)
   Increase in deposits                                       -      (12,260)     (12,260)
                                                      ---------    ---------  -----------

      Net cash used in investing activities                   -      (33,397)    (357,360)

Cash flows from financing activities:
   Proceeds from recapitalization                             -      220,100      220,100
   Deferred stock offering costs                              -       10,746            -
   Proceeds from sale of common stock                         -      798,110    1,153,110
   Proceeds from stockholder loans                            -            -      809,678
   Proceeds from (payments on) stockholder
     advances                                            34,000      (98,873)           -
                                                      ---------    ---------  -----------
      Net cash provided by financing
        activities                                       34,000      930,083    2,182,888
                                                      ---------    ---------  -----------
Net increase in cash                                      3,000      138,424      138,715

Cash at beginning of period                               1,677          291            -
                                                      ---------    ---------  -----------
Cash at end of period                                 $   4,677    $ 138,715  $   138,715
                                                      =========    =========  ===========

</TABLE>

                            See accompanying notes.
                                      F-24
<PAGE>
                                 ENTROPIN, INC.
                          (A DEVELOPMENT STAGE COMPANY)

                     NOTES TO UNAUDITED FINANCIAL STATEMENTS

                                  June 30, 1998


The  accompanying  financial  statements  of the Company  have been  prepared in
accordance with generally accepted  accounting  principles for interim financial
information and with the  instructions  to Form 10-QSB.  Certain notes and other
information have been condensed or omitted from the interim financial statements
presented  in  this  report.  Accordingly,  they  do  not  include  all  of  the
information and footnotes required by generally accepted  accounting  principles
for complete financial statements.  In the opinion of management,  the financial
statements reflect all adjustments considered necessary for a fair presentation.
The results of  operations  for the three  months and six months  ended June 30,
1998 are not  necessarily  indicative of the results to be expected for the full
year. For further  information,  refer to the financial statements and footnotes
thereto  included  in the  Company's  Annual  Report on Form 10-KSB for the year
ended December 31, 1997 as filed with the Securities and Exchange Commission.

1. Organization and summary of significant accounting policies
   -----------------------------------------------------------
   Organization:

   Entropin,  Inc. a   Colorado corporation,  was organized in August 1984, as a
   pharmaceutical  research company developing  Esterom(R),  a topically applied
   compound for the treatment of impaired range of motion  associated with acute
   lower back sprain and acute painful shoulder. The Company is considered to be
   a  development  stage  enterprise as more fully defined in Statement No. 7 of
   the Financial Accounting  Standards Board.  Activities from inception include
   research  and  development  activities,   seeking  the  U.S.  Food  and  Drug
   Administration (FDA) approval for Esterom(R), as well as fund raising.

   On January 15,  1998,  the Company  consummated  an  agreement  and  plan  of
   merger with Vanden Capital group, Inc. (Vanden), in which Vanden acquired all
   of the issued and outstanding  common shares of the Company (see Note 5). The
   Company was merged into Vanden, and Vanden changed its name to Entropin, Inc.
   For   accounting   purposes   the   acquisition   has  been   treated   as  a
   recapitalization  of the  Company,  based  upon  historical  cost,  a reverse
   acquisition with the Company as the acquirer.

   Basis of presentation and management's plans:

   The Company's  financial  statements have  been  presented on a going concern
   basis which  contemplates  the realization of assets and the  satisfaction of
   liabilities  in  the  normal  course  of  business.  The  Company  is in  the
   development stage and has been primarily involved in research and development
   activities.  This has  resulted  in  significant  losses  and an  accumulated
   deficit at June 30, 1998 of $5,515,015.  The Company's continued existence is
   dependent  on its  ability  to obtain the  additional  funding  necessary  to
   complete the FDA approval process for Esterom(R) and market the product.



                                      F-25
<PAGE>
                                 ENTROPIN, INC.
                          (A DEVELOPMENT STAGE COMPANY)

                     NOTES TO UNAUDITED FINANCIAL STATEMENTS

                                  June 30, 1998




1.   Organization and summary of significant accounting policies (continued)
     -----------------------------------------------------------------------

     As  described in Note 5, the Company has  successfully  completed a private
     placement  and  a  recapitalization  of  the  Company  which  will  provide
     additional liquidity for the Company for current operations. The Company is
     also currently conducting a private offering of a maximum of 400,000 shares
     of Series B convertible  preferred  stock for gross  proceeds of $2,000,000
     (see Note 4). As of July 31,  1998,  the Company  sold  250,500  shares for
     total  net  proceeds  of  aproximately  $1,150,000.  However,  the  Company
     estimates it will require  additional  funding of up to $7,000,000 over the
     next three years to  successfully  complete the FDA approval  process.  The
     financial  statements  do  not  include  any  adjustment  relating  to  the
     recoverability  and  classification of recorded asset amounts or the amount
     and  classification  of  liabilities  or other  adjustments  that  might be
     necessary  should the Company be unable to  continue as a going  concern in
     its present form.

     Use of estimates:

     The  preparation  of financial  statements  in  conformity  with  generally
     accepted  accounting  principles  requires management to make estimates and
     assumptions  that affect the reported amounts of assets and liabilities and
     disclosure  of  contingent  assets  and  liabilities  at  the  date  of the
     financial  statements  and the  reported  amounts of revenues  and expenses
     during  the  reporting  period.  Actual  results  could  differ  from those
     estimates.

     Office equipment:

     Office equipment is recorded at cost.  Depreciation  commences as items are
     placed in service  and is  computed  on a  straight-line  method over their
     estimated useful lives of five years.

     Deferred stock offering costs:

     Deferred  stock  offering  costs  represent  costs incurred to December 31,
     1997, in connection with the private  placement of common stock, more fully
     discussed in Note 5. Costs  incurred as of December 31, 1997 and additional
     costs incurred  subsequent to that date,  were charged against the proceeds
     of that offering.

     Patents:

     Patents  are  stated  at  cost  less  accumulated   amortization  which  is
     calculated  on a  straight-line  basis over the useful lives of the assets,
     estimated by management to average 17 years. Research and development costs
     and any  costs  associated  with  internally  developed  patents  (with the
     exception of legal costs) are expensed in the year incurred.

                                       F-26

<PAGE>
                                 ENTROPIN, INC.
                          (A DEVELOPMENT STAGE COMPANY)

                     NOTES TO UNAUDITED FINANCIAL STATEMENTS

                                  June 30, 1998


1. Organization and summary of significant accounting policies (continued)
   ----------------------------------------------------------------------

   Impairment of long-lived assets:

   The Company  evaluates  the potential  impairment  of  long-lived  assets  in
   accordance  with  Statement  of  Financial   Accounting  Standards  No.  121,
   Accounting for the Impairment of Long-Lived  Assets and for Long-Lived Assets
   to be  Disposed  of. The  Company  annually  reviews  the amount of  recorded
   long-lived assets for impairment.  If the sum of the expected cash flows from
   these assets is less than the carrying-amount,  the Company will recognize an
   impairment loss in such period.

   Cash equivalents:

   For the  purpose of the  statement of cash flows,  the Company  considers all
   highly liquid  debt instruments  purchased with a maturity of three months or
   less to be cash equivalents.

   Concentrations of credit risk:

   Financial instruments which potentially subject the Company to concentrations
   of credit risk consist  principally of cash. The Company places its cash with
   high  quality  financial  institutions.  At  times,  the  balance  at any one
   financial institution may exceed FDIC limits.
 
   Income taxes:

   The Company provides for income taxes utilizing the liability  approach under
   which  deferred  income  taxes are  provided  based upon enacted tax laws and
   rates applicable to the periods in which the taxes become payable.

   Reclassifications:

   Certain  reclassifications have been made to the 1997 financial statements to
   conform to the 1998 financial statement presentation.

2. Related party transactions
   --------------------------

   Lease agreement:

   In February 1998, the Company entered into an office lease arrangement with a
   shareholder. The lease has a two-year term expiring on February 1, 2000 and a
   monthly rent of $1,040.


                                      F-27
<PAGE>
                                 ENTROPIN, INC.
                          (A DEVELOPMENT STAGE COMPANY)

                     NOTES TO UNAUDITED FINANCIAL STATEMENTS

                                  June 30, 1998


2. Related party transactions (continued)
   --------------------------------------

   Advances - stockholders:

   At December  31,  1997,  an  aggregate  of $98,873  had been  advanced to the
   Company by two  shareholders.  The advances  were repaid in January 1998 from
   proceeds associated with the recapitalization of the Company (see Note 5).

3. Income taxes
   ------------

   The  consummation  of the stock  exchange  with  Vanden and the  issuance  of
   preferred  stock in January  1998 (see Note 5),  resulted  in a change in the
   Company's  tax status from an S  corporation  to a taxable  corporation.  The
   effect of the change is to provide for income tax based upon reported results
   of  operations,  and to  provide  deferred  tax  assets  and  liabilities  on
   temporary differences between reported earnings and taxable income. Since the
   Company  has  had  losses  since  inception,  no  change  in the  results  of
   operations would have occurred, assuming the change in status occurred at the
   beginning of the periods presented.

   At  June 30,  1998,  the Company  has a  net operating  loss  carryforward of
   approximately  $745,000 and future tax deductions of $1,980,000  which may be
   used to offset future taxable income.  The future tax deductions  result from
   utilizing the cash basis for income tax reporting purposes and unearned stock
   compensation.  The difference  between the tax loss  carryforwards and future
   tax  deductions  and the  cumulative  losses from  inception  result from the
   losses  previously  incurred by the S  corporation.  The net  operating  loss
   expires in 2018.  At June 30, 1998,  total  deferred tax assets and valuation
   allowance are as follows:

     Deferred tax assets resulting from:
       Net operating loss carryforwards                          $   280,000
       Accrual to cash adjustments                                   690,000
       Unearned stock compensation                                    50,000
                                                                 -----------
         Total                                                     1,020,000
       Less valuation allowance                                   (1,020,000)
                                                                 -----------
                                                                 $         -
                                                                 ===========

   A 100%  valuation  allowance  has been  established  against the deferred tax
   assets,  as utilization of the loss  carryforwards  and  realization of other
   deferred tax assets cannot be reasonably assured.

4. Redeemable preferred stock
   --------------------------

   On January 15,  1998,  the Company  issued  3,210,487  shares of its Series A
   redeemable  non-voting,  non-cumulative 8% preferred stock in exchange for an
   aggregate  $1,710,487 of notes payable to shareholders and accrued  interest,
   and a $1,500,000 compensation agreement. The annual 8% dividend is based upon
   a $1.00 per share value, and is only payable out of earnings.

                                      F-28
<PAGE>
                                 ENTROPIN, INC.
                          (A DEVELOPMENT STAGE COMPANY)

                     NOTES TO UNAUDITED FINANCIAL STATEMENTS

                                  June 30, 1998


4.   Redeemable preferred stock (continued)
     --------------------------------------

     In June 1998, the Company  commenced a private  placement of 400,000 shares
     of Series B preferred  stock at $5.00 per share.  As of July 31, 1998,  the
     Company  sold  250,500  shares  for  total  net  proceeds  of  aproximately
     $1,150,000.  The Series B preferred  stock is designated as redeemable  10%
     cumulative  non-voting  convertible  preferred  stock with $.001 par value.
     Dividends  will  accrue at the rate of $.50 per share per annum and will be
     paid  annually  in  arrears  commencing  July 15,  1998.  At the  Company's
     election,  annual  dividends  may be paid in cash  and/or  in shares of the
     Company's common stock valued at $5.00 per share.

5.   Stockholders' equity
     --------------------

     Recapitalization:

     On December 9, 1997,  the Company  entered  into an  agreement  and plan of
     merger  with Vanden to exchange  all of the issued and  outstanding  common
     shares of the Company,  in exchange for 5,220,000  shares of Vanden's $.001
     par value common stock, a reverse acquisition.

     Pursuant to the  agreement,  Vanden  agreed to have cash of $220,000 and no
     unpaid  liabilities at the effective date of the transaction.  The exchange
     was   consummated   on  January   15,   1998.   In   connection   with  the
     recapitalization,  the Company issued 180,001 shares of its $.001 par value
     common stock for cash of $100 and options to purchase an additional 180,001
     shares of common  stock for $2.80 per share,  as required  by a  management
     advisory  services  contract  as  compensation  for  arranging  a merger or
     acquisition  acceptable  to the Company.  The  difference  between the fair
     value of the stock, estimated by the Company to be $2.75 per share, and the
     purchase  price for the initial  180,001  shares was treated as  additional
     cost of the merger and changed to capital,  consistent  with accounting for
     the  reverse  acquisition  as a  recapitalization.  The net  effect of this
     transaction  was to record an increase and related  decrease to  additional
     paid-in  capital of  $495,000.  The  remaining  options to acquire  180,001
     shares are exercisable for a five-year period.

     Following the exchange, the Company's shareholders own approximately 95% of
     the outstanding  common stock of Vanden.  The reverse  acquisition has been
     accounted for as a  recapitalization  of the Company based upon  historical
     cost.  Accordingly,  the number of authorized and issued common shares, par
     value of common stock and additional  paid-in capital have been restated on
     the  balance  sheet  and the  statement  of  stockholders'  equity  to give
     retroactive effect to the recapitalization.

     Private placement:

     On January 15, 1998, the Company  completed a private  placement of 300,000
     shares of its $.001 par value common stock for gross  proceeds of $825,000,
     $2.75 per share.

                                      F-29
<PAGE>
                                 ENTROPIN, INC.
                          (A DEVELOPMENT STAGE COMPANY)

                     NOTES TO UNAUDITED FINANCIAL STATEMENTS

                                  June 30, 1998


5. Stockholders' equity (continued)
   --------------------------------

   Stock options:

   On June 9, 1998,  the board of directors  approved a  resolution  whereby the
   Company  granted to each director  options to purchase up to 60,000 shares of
   the Company's common stock (300,000 shares in the aggregate),  exercisable at
   $3.00 per  share.  The  options  vest at the rate of 20,000  shares  per year
   commencing  February 1999 through February 2001.  Should any of the directors
   cease to serve on the Board of  Directors,  all  non-vested  options shall be
   forfeited.

   Unearned stock compensation:

   At June 30, 1998, the Company had granted an aggregate of 850,000  options at
   purchase  prices  lower  than  fair  value  of the  stock  at date of  grant,
   including the director stock options disclosed above (see Note 7). The excess
   of the market value over the exercise  price has been  recorded as additional
   paid-in  capital and unearned stock  compensation.  Unearned  compensation is
   being amortized to expense over the term of the related agreements.

6. Loss per common share
   ---------------------

   Basic net loss per common  share is based on the weighted  average  number of
   shares   outstanding   during  the   periods.   Shares   issued  for  nominal
   consideration are considered  outstanding  since inception.  Diluted loss per
   share has not been  presented as exercise of the  outstanding  stock  options
   would have an anti-dilutive effect.

7. Commitments
   -----------

   Compensation agreements:

   In 1993,  the Company  entered  into a 30 year  compensation  agreement  with
   I.B.C. limited partners owning 64.28% of the limited partnership.  The I.B.C.
   Limited Partnership  participated in the early development of Esterom(R) (the
   medicine) and owned the patent  rights to three patents and all  intellectual
   property rights.  Under the terms of the Agreement,  the Company acquired all
   of the  patent and  intellectual  property  rights in  exchange  for  certain
   compensation to the limited  partners,  which is dependent upon the Company's
   receipt  of  a  marketing  partners  technological  access  fee  and  royalty
   payments. The partnership was subsequently dissolved.  Compensation under the
   agreement  includes  a bonus  payment  of  $96,420 to be paid at the time the
   Company  is  reimbursed  by  a  drug  company  for  past  expenses  paid  for
   development of the medicine,  as well as 64.28% of a decreasing  payment rate
   (3% to 1%) on cumulative annual royalties received by the Company. As of June
   30, 1998 , no liabilities have been accrued with respect to this agreement.


                                      F-30
<PAGE>
                                 ENTROPIN, INC.
                          (A DEVELOPMENT STAGE COMPANY)

                     NOTES TO UNAUDITED FINANCIAL STATEMENTS

                                  June 30, 1998


7. Commitments (continued)
   -----------------------

   In a separate agreement with a former I.B.C. limited partner, the Company has
   agreed to pay the partner 35.72% of a decreasing  earned payment (3% to 1% on
   cumulative  annual sales of products by the Company)  until October 10, 2004.
   From  October  10,  2004 until  October 10,  2014,  the Company  will pay the
   partner 17.86% of the earned payment.  In accordance with the agreement,  the
   Company  has agreed to pay the former  limited  partner the amount of $40,000
   and a minimum  earned  payment of $3,572 per  calendar  quarter  beginning on
   December  1,  1989.  Such  minimum  earned  payment is to be  evidenced  by a
   promissory  note issued each  quarter and payable  when the Company is either
   reimbursed for expenses paid for the  development of the medicine or from the
   first income  received from the Company from net sales of the  medicine.  The
   quarterly  payments  are to be  applied  against  the  earned  payment  to be
   received by the limited partner.  As of December 31, 1997, and June 30, 1998,
   the total liability  accrued with respect to this agreement  totaled $155,495
   and  $162,639,  respectively.  The Company will receive a credit  against the
   earned  payments  for 50% of monies  which are  expended in  connection  with
   preparing,  filing, obtaining, and maintaining patents involved with the sold
   rights.

   Development and Supply Agreements:

   On January 1, 1997, the Company  entered into 10 year  Development and Supply
   Agreements  with  Mallinckrodt,   Inc.  to  develop  all  of  the  chemistry,
   manufacturing  and  controls  to comply with the drug master file of the Food
   and Drug  Administration  as well as  supply  the  bulk  active  product  for
   marketing.  In  exchange  for  these  services,   Mallinckrodt  will  receive
   exclusive  rights as a supplier of the bulk active  product to the Company in
   North America. For the first year ended December 31, 1997, the contract price
   of the  ingredient  was fixed  based on the  number of liters  ordered by the
   Company. Subsequent to December 31, 1997, the cost per liter will be adjusted
   based on changes in the price of the components in the bulk active product.

   In addition,  pursuant to the agreement, the Company has granted Mallinckrodt
   a right of first  refusal to supply the  Company's  requirements  of the bulk
   active product in all other parts of the world outside of North America.

   License Agreement:

   In January 1998, the Company entered into an agreement with a director of the
   Company,  whereby the Company granted the director a  non-exclusive  right to
   make, import and use the Company's product,  Esterom(R),  under the Company's
   licensed patents and to use the Company's confidential information to develop
   new products that contain the same active ingredients as Esterom(R),  but are
   formulated  differently.  All rights to the improved products will remain the
   exclusive property of the Company and the director will receive a two percent
   royalty on the net sales of all improved  products,  and a negotiated royalty
   on new products. The expiration date of this agreement is January 1, 2003.

                                      F-31
<PAGE>
                                 ENTROPIN, INC.
                          (A DEVELOPMENT STAGE COMPANY)

                     NOTES TO UNAUDITED FINANCIAL STATEMENTS

                                  June 30, 1998

7.   Commitments (continued)
     -----------------------

     Management agreement:

     During April 1998,  the Company  entered into an agreement with the Western
     Center for Clinical Studies, Inc. (WCCS), a company experienced in managing
     pharmaceutical  development,   including  providing  assistance  in  taking
     pharmaceutical  products to the FDA and through the clinical trials and New
     Drug  Application  stages of  development.  The  Company is required to pay
     management  fees of $880,400 over the 33 month term of the  agreement,  and
     has granted  stock options to WCCS to purchase  450,000  shares of Entropin
     common stock. The options have a term of five years from the grant date and
     an exercise price of $1.50.  The options are exercisable in varying amounts
     on dates ranging from August 1998 to December 2000.

     The  difference  between the fair value of the options at date of grant and
     the  exercise   price,   totaling   approximately   $1,950,000   using  the
     Black-Scholes  option - pricing  model,  has been  recorded  as  additional
     paid-in  capital  and  unearned  stock  compensation.  The  unearned  stock
     compensation is being  amortized to expense on a  straight-line  basis over
     the 33 month term of the agreement.

     Amendment to management advisory agreement:

     On May 5,  1998,  the  Company  amended  an  existing  management  advisory
     services  agreement with an  organization  to extend the agreement  through
     October 28, 2000 and to provide a monthly fee of $5,000 to the organization
     through April 1, 1999. As additional  compensation,  the  organization  was
     granted an option to purchase up to 100,000  shares of the Company's  $.001
     par value common stock at a purchase  price of $4.00 per share.  The rights
     granted under the stock option are exercisable if written notice of a right
     to exercise  the option is given by the Company to the  organization  on or
     before 180 days from May 5, 1998.


                                       F-32
<PAGE>









                                 ENTROPIN, INC.




                                _________ Shares









                                   PROSPECTUS











                                __________, 1998

<PAGE>
                                     PART II

                     INFORMATION NOT REQUIRED IN PROSPECTUS

ITEM 24. INDEMNIFICATION OF DIRECTORS AND OFFICERS.

A. The Colorado Business  Corporation Act (the "Act") allows  indemnification of
directors,  officers,  employees and agents of the Company  against  liabilities
incurred in any proceeding in which an individual is made a party because he was
a director,  officer,  employee or agent of the Company if such person conducted
himself  in good  faith and  reasonable  believed  his  actions  were in, or not
opposed to, the best interests of the Company,  and with respect to any criminal
action or  proceeding,  had no  reasonable  cause to  believe  his  conduct  was
unlawful.  A person must be found to be entitled to  indemnification  under this
statutory standard by procedures  designed to assure that disinterested  members
of the Board of Directors  have  approved  indemnification  or that,  absent the
ability to obtain  sufficient  numbers of disinterested  directors,  independent
counsel or  shareholders  have approved the  indemnification  based on a finding
that the person has met the standard.  Indemnification  is limited to reasonable
expenses. In addition, the Company's By-Laws provide that the Company shall have
the power to indemnify  its  officers,  directors,  employees  and agents to the
extent permitted by the Act.

     Specifically, the Act provides as follows:

     "7-109-102. Authority to indemnify directors.

          (1)  Except  as  provided  in  subsection  (4)  of  this  section,   a
     corporation may indemnify a person made a party to a proceeding because the
     person is or was a director  against  liability  incurred in the proceeding
     if:

               (a) The person conducted himself or herself in good faith; and

               (b) The person reasonably believed:

                    (I) In the case of conduct in an official  capacity with the
          corporation,  that his or her  conduct was in the  corporation's  best
          interests; and

                    (II) In all  other  cases,  that his or her  conduct  was at
          least not opposed to the corporation's best interests; and

               (c) In the case of any  criminal  proceeding,  the  person had no
          reasonable cause to believe his or her conduct was unlawful.

          (2) A director's  conduct with respect to an employee benefit plan for
     a purpose the director  reasonably  believed to be in the  interests of the
     participants in or  beneficiaries of the plan is conduct that satisfies the

                                      II-1
<PAGE>

     requirement of subparagraph (II) of paragraph (b) of subsection (1) of this
     section.  A director's conduct with respect to an employee benefit plan for
     a  purpose  that  the  director  did not  reasonably  believe  to be in the
     interests  of the  participants  in or  beneficiaries  of the plan shall be
     deemed not to satisfy the  requirements  of paragraph (a) of subsection (1)
     of this section.

          (3) The  termination of a proceeding by judgment,  order,  settlement,
     conviction,  or upon a plea of nolo contendere or its equivalent is not, of
     itself,  determinative  that the  director  did not meet  the  standard  of
     conduct described in this section.

          (4) A corporation may not indemnify a director under this section:

               (a) In  connection  with a  proceeding  by or in the right of the
          corporation  in  which  the  director  was  adjudged   liable  to  the
          corporation; or

               (b) In  connection  with any other  proceeding  charging that the
          director  derived  an  improper  personal  benefit,   whether  or  not
          involving  action in an official  capacity,  in which  proceeding  the
          director  was  adjudged  liable on the basis that he or she derived an
          improper personal benefit.

          (5) Indemnification  permitted under this section in connection with a
     proceeding by or in the right of the  corporation  is limited to reasonable
     expenses incurred in connection with the proceeding.

     7-109-103. MANDATORY INDEMNIFICATION OF DIRECTORS.

          Unless limited by its articles of  incorporation,  a corporation shall
     indemnify a person who was wholly  successful,  on the merits or otherwise,
     in the defense of any  proceeding  to which the person was a party  because
     the person is or was a director,  against  reasonable  expenses incurred by
     him or her in connection with the proceeding.

     7-109-105. COURT-ORDERED INDEMNIFICATION OF DIRECTORS.

          (1) Unless  otherwise  provided in the  articles of  incorporation,  a
     director   who  is  or  was  a  party  to  a   proceeding   may  apply  for
     indemnification  to the court conducting the proceeding or to another court
     of competent jurisdiction.  On receipt of an application,  the court, after
     giving any notice the court considers necessary,  may order indemnification
     in the following manner:

               (a) If it  determines  that the director is entitled to mandatory
          indemnification  under  section  7-109-103,   the  court  shall  order
          indemnification,  in  which  case  the  court  shall  also  order  the
          corporation  to pay the  director's  reasonable  expenses  incurred to
          obtain court-ordered indemnification.

                                      II-2

<PAGE>

               (b) If it determines  that the director is fairly and  reasonably
          entitled to indemnification in view of all the relevant circumstances,
          whether or not the  director  met the standard of conduct set forth in
          section  7-109-102(1)  or was  adjudged  liable  in the  circumstances
          described   in  section   7-109-102(4),   the  court  may  order  such
          indemnification   as  the  court   deems   proper;   except  that  the
          indemnification  with  respect to any  proceeding  in which  liability
          shall have been  adjudged in the  circumstances  described  in section
          7-109-102(4) is limited to reasonable  expenses incurred in connection
          with  the  proceeding  and  reasonable  expenses  incurred  to  obtain
          court-ordered indemnification.

     7-109-106. DETERMINATION AND AUTHORIZATION OF INDEMNIFICATION OF DIRECTORS.

          (1) A corporation may not indemnify a director under section 7-109-102
     unless  authorized in the specific case after a determination has been made
     that  indemnification  of the director is permissible in the  circumstances
     because the  director  has met the standard of conduct set forth in section
     7-109-102.  A corporation  shall not advance  expenses to a director  under
     section  7-109-104 unless authorized in the specific case after the written
     affirmation and undertaking required by section  7-109-104(1)(a) and (1)(b)
     are received and the determination required by section  7-109-104(1)(c) has
     been made.

          (2) The  determinations  required by  subsection  (1) of this  section
     shall be made:

               (a) By the board of directors by a majority vote of those present
          at a meeting at which a quorum is  present,  and only those  directors
          not  parties to the  proceeding  shall be counted  in  satisfying  the
          quorum; or

               (b) If a quorum  cannot  be  obtained,  by a  majority  vote of a
          committee  of the  board  of  directors  designated  by the  board  of
          directors,  which committee shall consist of two or more directors not
          parties to the  proceeding;  except that  directors who are parties to
          the proceeding may participate in the designation of directors for the
          committee.

          (3) If a quorum cannot be obtained as contemplated in paragraph (a) of
     subsection (2) of this section, and a committee cannot be established under
     paragraph  (b) of subsection  (2) of this section,  or, even if a quorum is
     obtained  or a committee  is  designated,  if a majority  of the  directors
     constituting  such quorum or such committee so directs,  the  determination
     required to be made by subsection (1)of this section shall be made:

               (a) By independent  legal counsel selected by a vote of the board
          of directors or the committee in the manner specified in paragraph (a)
          or (b) of  subsection  (2) of this section or, if a quorum of the full
          board cannot be obtained  and a committee  cannot be  established,  by
          independent  legal  counsel  selected  by a majority  vote of the full
          board of directors; or

               (b) By the shareholders.

                                      II-3

<PAGE>

          (4) Authorization of indemnification  and advance of expenses shall be
     made in the  same  manner  as the  determination  that  indemnification  or
     advance of expenses is permissible;  except that, if the determination that
     indemnification   or  advance  of  expenses  is   permissible  is  made  by
     independent legal counsel,  authorization of indemnification and advance of
     expenses shall be made by the body that selected such counsel.

     7-109-107. INDEMNIFICATION OF OFFICERS, EMPLOYEES, FIDUCIARIES, AND AGENTS.

          (1) Unless otherwise provided in the articles of incorporation:

               (a) An officer is entitled  to  mandatory  indemnification  under
          section  7-109-103,   and  is  entitled  to  apply  for  court-ordered
          indemnification  under  section  7-109-105,  in each  case to the same
          extent as a director;

               (b) A  corporation  may  indemnify  and  advance  expenses  to an
          officer, employee,  fiduciary, or agent of the corporation to the same
          extent as to a director; and

               (c) A corporation  may also indemnify and advance  expenses to an
          officer,  employee,  fiduciary,  or agent who is not a  director  to a
          greater  extent,  if  not  inconsistent  with  public  policy,  and if
          provided for by its bylaws, general or specific action of its board of
          directors or shareholders, or contract.

     7-109-108. INSURANCE.

          A  corporation  may  purchase  and  maintain  insurance on behalf of a
     person who is or was a director, officer, employee,  fiduciary, or agent of
     the corporation, or who, while a director, officer, employee, fiduciary, or
     agent  of  the  corporation,  is or  was  serving  at  the  request  of the
     corporation as a director, officer, partner, trustee, employee,  fiduciary,
     or agent of another  domestic or foreign  corporation or other person or of
     an employee benefit plan, against liability asserted against or incurred by
     the  person  in that  capacity  or  arising  from  his or her  status  as a
     director,  officer,  employee,  fiduciary,  or  agent,  whether  or not the
     corporation  would have power to  indemnify  the  person  against  the same
     liability  under  section  7-109-102,  7-109-103,  or  7-109-107.  Any such
     insurance  may be procured  from any  insurance  company  designated by the
     board of directors, whether such insurance company is formed under the laws
     of this state or any other  jurisdiction of the United States or elsewhere,
     including any insurance  company in which the  corporation has an equity or
     any other interest through stock ownership or otherwise.

     7-109-109. LIMITATION OF INDEMNIFICATION OF DIRECTORS.

          (1) A  provision  treating  a  corporation's  indemnification  of,  or
     advance of expenses  to,  directors  that is  contained  in its articles of
     incorporation  or bylaws,  in a resolution of its  shareholders or board of
     directors,  or in a contract,  except an insurance policy, or otherwise, is

                                      II-4
<PAGE>

     valid only to the extent the  provision is not  inconsistent  with sections
     7-109-101   to   7-109-108.   If  the  articles  of   incorporation   limit
     indemnification  or advance of  expenses,  indemnification  and  advance of
     expenses are valid only to the extent not inconsistent with the articles of
     incorporation.

          (2) Sections 7-109-101 to 7-109-108 do not limit a corporation's power
     to pay or reimburse  expenses  incurred by a director in connection with an
     appearance  as a witness in a  proceeding  at a time when he or she has not
     been made a named defendant or respondent in the proceeding.

     7-109-110. NOTICE TO SHAREHOLDERS OF INDEMNIFICATION OF DIRECTOR.

          If a corporation  indemnifies or advances expenses to a director under
     this  article in  connection  with a  proceeding  by or in the right of the
     corporation,   the   corporation   shall   give   written   notice  of  the
     indemnification or advance to the shareholders with or before the notice of
     the next  shareholders'  meeting.  If the next shareholder  action is taken
     without a meeting at the instigation of the board of directors, such notice
     shall  be given  to the  shareholders  at or  before  the  time  the  first
     shareholder signs a writing consenting to such action."

B.  Article  VIII  of  the  Registrant's   Amended  and  Restated   Articles  of
Incorporation  provides for the  elimination of personal  liability for monetary
damages for the breach of fiduciary duty as a director  except for liability (i)
resulting from a breach of the  director's  duty of loyalty to the Registrant or
its shareholders;  (ii) for acts or omissions not in good faith or which involve
intentional  misconduct or a knowing  violation of the law;  (iii) for approving
payment of distributions to shareholders to the extent that any such actions are
illegal under the Act; or (iv) for any transaction from which a director derives
an improper  personal  benefit.  This Article further provides that the personal
liability of the  Registrant's  directors  shall be eliminated or limited to the
fullest extent permitted by the Act.

     On January 29, 1998, the Company obtained  Directors and Officers indemnity
liability insurance coverage,  including securities coverages,  in the amount of
$3,000,000  which  indemnifies the Company  against claims,  as well as provides
coverage  against any claims  against the officers and  directors of the Company
which (i) the Company is not legally  permitted  or required to pay or (ii) when
the Company is legally  required or  permitted  to pay such loss as indemnity to
the  Directors  and  Officers but cannot in fact pay such loss due solely to the
financial insolvency of the Company.

     There is no pending litigation or proceeding involving a director, officer,
employee or other agent of the Company as to which  indemnification  is being or
may be sought,  and the Company is not aware of any other  pending or threatened
litigation  that may  result  in claims  for  indemnification  by any  director,
officer, employee or other agent.


                                      II-5

<PAGE>



ITEM 25.  OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION

         The  following is an  itemization  of all  expenses  (subject to future
contingencies)  incurred or to be incurred by the Registrant in connection  with
the issuance and distribution of the securities being offered.

       Registration and filing fee ............................     $ 13,388.00
       Printing . . . . . . . .................................        1,000.00
       Edgar costs ............................................        1,000.00
       Accounting fees and expenses ...........................        3,000.00
       Legal fees and expenses ................................       25,000.00
       Blue Sky fees and filing fees ..........................        7,500.00
       Postage and Delivery ...................................        1,500.00
       Miscellaneous ..........................................          350.00
                                                                   ------------
       Total ..................................................     $ 52,738.00
                                                                    ===========

     All amounts listed above,  except for the registration fees, are estimates.
All  expenses  itemized  above  will  be  paid by the  Registrant.  Sales  agent
discounts and commissions to any brokers or dealers will be borne by the Selling
Shareholders for the Shares offered by the Selling Shareholders.

ITEM 26.  RECENT SALES OF UNREGISTERED SECURITIES

     During  the past  three  years,  the  Registrant  and Old  Entropin  issued
securities  to the  following  persons  for  the  cash  or  other  consideration
indicated in transactions that were not registered under the 1933 Act.

                  January 1998 Private Placement (Old Entropin)
                  ---------------------------------------------

                                No. of Shares of
Name                              Common Stock         Consideration Received
- ----                            ----------------       ----------------------

Suzanne Oliphant                      10,000                   $27,500
Albert W. White                       10,000                   $27,500
Stephen H. West                       20,000                   $55,000
C. Richard Harrison                   10,000                   $27,500
Jeanette Y. Mihaly                    20,000                   $55,000
Joy Ann Svenson                       10,000                   $27,500
Richard L. Monfort                   180,000                  $495,000
David T. Treadwell                    10,000                   $27,500

                                      II-6

<PAGE>

David Bressler                         5,000                   $13,750
Gerald Olesh                          10,000                   $27,500
Arthur Kassoff                        10,000                   $27,500
Armond A. Azharian                     5,000                   $13,750
                                     -------                  --------
        Total                        300,000                  $825,000
                                     =======                  ========

     The offers and sales set forth in I above  were made in  reliance  upon the
exemption  from  registration  provided  by Section  4(2) of the 1933 Act and/or
Regulation D and Rule 506 adopted thereunder. All of the purchasers are known by
Old  Entropin's  (now the  Registrant's)  Chairman,  Higgins D. Bailey,  or were
referred to him by other  purchasers  in this  offering.  Based upon the written
representations  made by the  purchasers  and  other  information  known  to the
Registrant,  the  Registrant  believes  all of the  purchasers  were  Accredited
Investors as that term is defined in Rule 501 of Regulation D. No broker/dealers
were  involved  in the  sale  and  no  commissions  were  paid.  All  purchasers
represented  that  they  purchased  the  securities  for  investment,   and  all
certificates  issued to the purchasers were impressed with a restrictive  legend
advising  that  the  shares   represented  by  certificates  may  not  be  sold,
transferred, pledged or hypothecated without having first been registered or the
availability  of an  exemption  from  registration  established.  Stop  transfer
instructions have been placed against the transfer of these  certificates by the
Registrant's Transfer Agent.

                                       II.

     In November 1997, Old Entropin issued an 8% note in the principal amount of
$1,500,000  maturing  December 31, 2000 payable to James E. Wynn as compensation
for  research  and  development  services  provided  since the  inception of the
Company.  In January 1998, Old Entropin  converted this  obligation to 1,500,000
shares of its redeemable 8% non-voting, non-cumulative Series A preferred stock,
at $1.00 per share.  The  issuance  of the  promissory  note and the  subsequent
conversion  into shares of Series A preferred  stock were made in reliance  upon
the  exemption  from  registration  provided  by  Section  4(2) of the Act.  The
purchaser  represented  that he acquired the securities for investment,  and all
certificates  issued to the purchaser were  impressed with a restrictive  legend
advising  that  the  shares   represented  by  certificates  may  not  be  sold,
transferred, pledged or hypothecated without having first been registered or the
availability  of an  exemption  from  registration  established.  Stop  transfer
instructions have been placed against the transfer of these  certificates by the
Registrant's Transfer Agent.

                                      II-7

<PAGE>
                                      III.

                       Debt/Equity Exchange (Old Entropin)
                       -----------------------------------

                             No. of Shares of Series
       Name                     A Preferred Stock        Consideration Received
       ----                  -----------------------     ----------------------

Higgins D. Bailey                     178,000                   $178,000
Lowell M. Somers                      822,446                   $822,446
Thomas T. Anderson Trust              710,041                   $710,041
                                    ---------                 ----------
      Total                         1,710,487                 $1,710,487
                                    =========                 ==========

     Old Entropin had accrued $1,710,487,  including interest, in long-term debt
owed to the  abovementioned  stockholders  at  December  31,  1996 and 1997.  On
January 15, 1998, Old Entropin converted all of such long-term debt plus accrued
interest  to  1,710,487  shares  of Old  Entropin's  redeemable  8%  non-voting,
non-cumulative  Series  A  Preferred  Stock  at $1 per  share,  for a  total  of
$1,710,487.  The issuance of the shares of Series A preferred  stock was made in
reliance upon the exemption  from  registration  provided by Section 4(2) of the
Act.  The  purchasers   represented   that  they  acquired  the  securities  for
investment,  and all certificates issued to the purchasers were impressed with a
restrictive  legend advising that the shares represented by certificates may not
be  sold,  transferred,  pledged  or  hypothecated  without  having  first  been
registered or the  availability of an exemption from  registration  established.
Stop  transfer  instructions  have been  placed  against  the  transfer of these
certificates by the Registrant's Transfer Agent.

                                       IV.

     In  December,  1997,  Old Entropin  entered  into an  agreement  with LMU &
Company  ("LMU").  As  partial   consideration  for  LMU's  services  under  the
agreement,  Old  Entropin  issued an option to  purchase  180,001  shares of Old
Entropin's  common  stock,  exercisable  for cash of $100.  The  issuance of the
option to LMU was made in reliance upon the exemption from registration provided
by Section 4(2) of the Act. No  broker/dealers  were involved in the sale and no
commissions  were  paid.  LMU  represented  that LMU  acquired  the  option  for
investment  and not with a view to  distribution.  LMU  exercised  its option in
January 1998. Stop transfer  instructions  have been placed against the transfer
of these certificates by the Registrant's transfer agent.

                                       V.

                     January 1998 Vanden-Old Entropin Merger
                     ---------------------------------------

     On January 15,  1998,  in order to  consummate  the  Agreement  and Plan of
Merger with  Entropin,  Inc., a California  corporation  ("Old  Entropin"),  the
Registrant  issued  5,700,001  shares of its Common  Stock,  $.001 par value per
share,  and  3,210,487  shares  of  the  Company's   redeemable  8%  non-voting,

                                      II-8
<PAGE>

non-cumulative  Preferred Stock,  $.001 par value per share, in exchange for all
of the issued and outstanding  shares of Common Stock and Preferred Stock of Old
Entropin on a one-for-one basis, as follows:
<TABLE>
<CAPTION>

                                                                                   Consideration Received
                                                                                        No. of Old
                                                   No. of Shares                     Entropin Shares
                                            ----------------------------        -----------------------------
Name
- ----                                                           Series A                            Series A
                                            Common             Preferred         Common            Preferred
                                            ------             ---------         ------            ---------
<S>                                        <C>                <C>               <C>                <C>
Caroline T. Somers                         1,145,793                            1,145,793

Higgins D. & Shirley A. Bailey             1,404,093                            1,404,093

Higgins D. Bailey, Pledge                  1,404,093                            1,404,093

Higgins D. Bailey                                               178,000                              178,000

Chandler G. Brown                            257,085                              257,085

CapMac Eighty-Two LP                          73,130                               73,130

Milton D. McKenzie, Trustee for
The Milton D. McKenzie
Revocable Trust                              102,834                              102,834

Milton D. McKenzie                            52,632                               52,632

James E. Wynn                                518,085          1,500,000           518,085          1,500,000

CKC Partners                                  78,300                               78,300

Danny and Nancy Yu                            10,000                               10,000

Brent and Marlene Jackson                     50,000                               50,000

William J. Currin                             10,000                               10,000

Jacquelyn D. Anderson Baker                    5,455                                5,455

Interstate Johnson Lane Corp.                 10,000                               10,000

Dennis K. Metzler                              5,000                                5,000

Jerry L. And Nancy Sands                       1,000                                1,000

The Macy Family Trust                         10,000                               10,000

Dewey H. And Virginia Crim                    20,000                               20,000

James W. Toot                                  7,500                                7,500
</TABLE>
                                      II-9

<PAGE>
<TABLE>
<CAPTION>
                                                                                  Consideration Received
                                                                                        No. of Old
                                                   No. of Shares                      Entropin Shares
                                            ----------------------------        -----------------------------
Name
- ----                                                           Series A                            Series A
                                            Common             Preferred         Common            Preferred
                                            ------             ---------         ------            ---------
<S>                                          <C>                <C>               <C>                <C>
Robert L. Simpson                              5,000                                5,000

Gladys F. Decker & Deloras D.
Hunter, Trustees for Gladys F.
Decker Trust No. 1                            20,000                               20,000

Donald Hunter, Trustee of the
Donald Hunter Residuary Marital
Trust                                         80,000                               80,000

Deloras Decker Hunter, Trustee
of the Deloras Decker Hunter
Generation Skipping Trust                     10,000                               10,000

Lowell M. Somers                                                822,446                              822,446

Thomas T. Anderson Trust                                        710,041                              710,041

The Underwood Family Partners                 60,001                               60,001

Steven C. & Lynn T. Quoy                      60,000                               60,000

Suzanne Oliphant                              10,000                               10,000

Albert W. White                               10,000                               10,000

Stephen H. West                               20,000                               20,000

C. Richard Harrison                           10,000                               10,000

Jeanette Y. Mihaly                            20,000                               20,000

Joy Ann Svenson                               10,000                               10,000

Richard L. Monfort                           180,000                              180,000

David T. Treadwell                            10,000                               10,000

David Bressler                                 5,000                                5,000

Gerald Olesh                                  10,000                               10,000

Arthur Kassoff                                10,000                               10,000
</TABLE>

                                     
                                     II-10
<PAGE>
<TABLE>
<CAPTION>
                                                                                   Consideration Received
                                                                                        No. of Old
                                                   No. of Shares                      Entropin Shares
                                            ----------------------------        -----------------------------
Name
- ----                                                           Series A                            Series A
                                            Common             Preferred         Common            Preferred
                                            ------             ---------         ------            ---------
<S>                                        <C>                <C>               <C>                <C>
Armond A. Azharian                             5,000                                5,000
                                           ---------          ---------         ---------          ---------
     TOTAL                                 5,700,001          3,210,487         5,700,001          3,210,487
                                           =========          =========         =========          =========
</TABLE>
     The  exchange  of Old  Entropin  shares  for shares of the  Registrant  was
effected  under the exemption from  registration  provided under Section 4(2) of
the Act and Rule 506 of Regulation D promulgated  thereunder,  for  transactions
not involving a public offering.  Based upon the written representations made by
the investors and other  information  known to the  Registrant,  the  Registrant
believes all of the investors were accredited  investors as that term is defined
in Rule 501 of Regulation D. All investors  represented  that they purchased the
securities for  investment,  and all  certificates  issued to the investors were
impressed  with a restrictive  legend  advising that the shares  represented  by
certificates  may not be sold,  transferred,  pledged  or  hypothecated  without
having  first  been  registered  or  the   availability  of  an  exemption  from
registration established. No broker/dealers were involved with the exchange, and
no commissions  were paid. Stop transfer  instructions  have been placed against
the transfer of these certificates by the Registrant's transfer agent.

   
                                       VI.

             July 1998 Private Placement of Series B Preferred Stock
<TABLE>
<CAPTION>
                                                     No. of Shares of Series B
Name                                                      Preferred Stock        Consideration Received
- ----                                                 -------------------------   ----------------------
<S>                                                            <C>                      <C>
Brian P. Bertelsen                                              5,000                   $   25,000
Cardiovascular Associates P.C.
Profit Sharing Plan FBO Lester
Lockspeiser M. D.                                               5,000                       25,000

CKC Partners                                                    5,000                       25,000

Brett Conrad                                                    5,000                       25,000

Russell L. Davis                                               10,000                       50,000

Gladys F. Decker Trust No. 1                                    5,000                       25,000

Paul Ernst                                                     15,000                       75,000

Heather M. Evans                                                2,000                       10,000

Barry Fey                                                       5,000                       25,000
    
</TABLE>

                                      II-11

<PAGE>
   
<TABLE>
<CAPTION>
                                                     No. of Shares of Series B
Name                                                      Preferred Stock        Consideration Received
- ----                                                 -------------------------   ----------------------
<S>                                                            <C>                      <C>
Thomas A. Forti                                                 5,000                   $   25,000

David L. Gertz                                                  5,000                       25,000

Abdallah E. Ghusn                                               5,000                       25,000

Growth Ventures, Inc. Pension Plan
& Trust                                                        10,000                       50,000

George Guerrieri                                                5,000                       25,000

Deloras Decker Hunter Generation
Skipping Trust                                                  5,000                       25,000

Interstate/Lane Johnson F/B/O
Kenton R. Holden                                                5,000                       25,000

Invernes Investments Profit
Sharing Plan                                                    5,000                       25,000

J. Paul Consulting Corp.                                       10,000                       50,000

Joseph E. Kovarik                                               5,000                       25,000

Samantha Landy                                                  4,000                       20,000

Arthur M. Lavenue                                               5,000                       25,000

Myron A. Leon                                                   2,500                       12,500

Macy Family Trust                                              20,000                      100,000

Jeffrey S. Maen and Leonard L.
Maen                                                            2,500                       12,500

B. Edwin Massey                                                 2,500                       12,500

Sharon M. McDonald                                             15,000                       75,000

David N. and Arianne B. Nemelka                                 5,000                       25,000

Pete Perlman                                                    2,000                       10,000

Douglas L. Ray                                                  5,000                       25,000

Dan Rudden                                                      5,000                       25,000

Donald H. Schroeder                                             5,000                       25,000

Ralph Tash Trust DTD 5/28/71                                   20,000                      100,000

James W. Toot                                                  25,000                      125,000
    
</TABLE>
                                      II-12

<PAGE>
   
<TABLE>
<CAPTION>
                                                     No. of Shares of Series B
Name                                                      Preferred Stock        Consideration Received
- ----                                                 -------------------------   ----------------------
<S>                                                           <C>                      <C>
Richard F. And Barbara A. Van
Dresser, TTEES of the Living Trust
DTD 5-5-92                                                      5,000                  $   25,000

Stephen H. West                                                 5,000                      25,000

Danny Yu Defined Benefit Pension                                5,000                      25,000
Plan                                                          -------                  ----------
    
                                        TOTAL                 250,500                  $1,252,500
                                                              =======                  ==========
</TABLE>

         The offers and sales set forth in VI above were made in  reliance  upon
the exemption from registration  provided by Section 4(2) of the 1933 Act and/or
Regulation D and Rule 506 adopted thereunder. Based upon written representations
made by each of the purchasers, the Registrant believes that all were Accredited
Investors as that term is defined in Rule 501 of  Regulation  D.  Broker/dealers
were  involved  in the sale of  $797,500  of the  Series B  Preferred  Stock and
approximately $79,750 were paid in commissions.  All purchasers represented that
they purchased the securities for investment, and all certificates issued to the
purchasers  were  impressed with a restrictive  legend  advising that the shares
represented  by  certificates   may  not  be  sold,   transferred,   pledged  or
hypothecated  without  having first been  registered or the  availability  of an
exemption from registration  established.  Stop transfer  instructions have been
placed against the transfer of these  certificates by the Registrant's  Transfer
Agent.
    

ITEM 27.  EXHIBITS AND FINANCIAL SCHEDULES

     The  following  is a  complete  list  of  exhibits  filed  as  part of this
Registration Statement, which Exhibits are incorporated herein.

 Exhibit
 Number           Description
 -------          -----------

3.1            Articles of Incorporation(1)

3.2            Bylaws(1)

3.3            Articles of Merger, as filed with the Colorado Secretary of State
               on January 15, 1998 (2)

3.4            Amended and Restated Articles of Incorporation, as filed with the
               Colorado Secretary of State on January 15, 1998, as corrected.(2)
   
3.5            Amended  Articles of  Incorporation,  as filed with the  Colorado
               Secretary of State on July 20, 1998(6)

4.3            Specimen copy of stock  certificate for  Common  Stock, $.001 par
               value;  Specimen copy of stock certificate for Series A Preferred
               Stock,$.001 par value. (2)
    
5.1            Form of Opinion of Brenman Bromberg & Tenenbaum, P.C.

10.1           Stock Option Plan(1)

                                      II-13
<PAGE>

10.2           Stock Bonus Plan(1)

10.3           Agreement  and Plan of Merger,  dated  December  9, 1997  between
               Vanden Capital Group, Inc. and Entropin, Inc.(2)

10.4           Agreement  dated  January 1, 1997,  between  the  Registrant  and
               Mallinckrodt, Inc. (Development and Supply Agreement)(4)

10.5           Lease Agreement,  dated February 1, 1998,  between the Registrant
               and Thomas T. Anderson(4)

10.6           License  Agreement dated January 1, 1998,  between the Registrant
               and Dr. James E. Wynn(4)

10.7           Assignment  of Patent  #4,556,663  dated  September  24, 1992, by
               Lowell M. Somers, M.D. to Entropin, Inc(4)

10.8           Assignment  of Patent  #4,512,996  dated  September  24, 1992, by
               Lowell M. Somers, M.D. to Entropin, Inc.(4)

10.9           Assignment  of Patent  #4,469,700  dated  September  24, 1992, by
               Lowell M. Somers, M.D. to Entropin, Inc.(4)

10.10          Assignment of rights in the  application for Letters Patent under
               Serial Number 07/999,307 by Lowell M. Somers and James E. Wynn to
               Entropin, Inc., dated February 16, 1993(4)

10.11          Assignment of rights in the  application for Letters Patent under
               Serial Number 08/260,054 by Lowell M. Somers and James E. Wynn to
               Entropin, Inc., dated July 29, 1994 (4)

10.12          Agreement  dated April 18, 1998 by and between the Registrant and
               the Western Center for Clinical Studies, Inc.(5)
   
10.13          Agreement Among Shareholders(6)
    
16.0           Statement  from  Schumacher &  Associates,  the prior  certifying
               accountant  in  response  to  the  information  disclosed  in the
               Company's  Form 8-K dated March 25, 1998,  captioned  "Changes in
               Registrant's Certifying Accountant"(3)

24.1           Consent  of Brenman  Bromberg  &  Tenenbaum,  P.C.  (included  in
               Exhibit 5)

24.2           Consent of Causey Demgen & Moore Inc.

27             Financial Data Schedule

                                      II-14
<PAGE>

- -----------

(1)  Incorporated  by reference  from the like numbered  exhibits filed with the
     Registrant's  Registration  Statement on Form S-1, No.  33-23693  effective
     October 21, 1989.
(2)  Incorporated  by reference  from the like numbered  exhibits filed with the
     Registrant's  Current  Report on Form 8-K,  as amended,  dated  January 15,
     1998.
(3)  Incorporated  by reference  from an exhibit  numbered 4.0 as filed with the
     Registrant's Current Report on Form 8-K, as amended, dated March 25, 1998.
(4)  Incorporated  by reference  from the like numbered  exhibits filed with the
     Registrant's  Annual  Report  on Form  10K-SB,  dated  April 15,  1998,  as
     amended.
(5)  Incorporated  by reference  from the like  numbered  exhibit filed with the
     Registrant's Current Report on Form 8-K, dated April 23, 1998.
   
(6)  Previously filed.
    
ITEM 28.  UNDERTAKINGS

The undersigned Registrant will:

     (a)(1) File,  during any period in which it offers or sells  securities,  a
post-effective  amendment  to this  registration  statement  to: (i) include any
prospectus  required by Section  10(a)(3) of the Securities Act; (ii) reflect in
the prospectus any facts or events which, individually or together,  represent a
fundamental change in the information in the registration  statement;  and (iii)
include  any  additional  or  changed  material   information  on  the  plan  of
distribution.

         (2) For  determining  liability  under the  Securities  Act, treat each
post-effective  amendment  as a new  registration  statement  of the  securities
offered,  and the offering of the securities at that time to be the initial bona
fide offering.

         (3) File a post-effective  amendment to remove from registration any of
the securities that remain unsold at the end of the offering.

     Insofar as indemnification for liabilities arising under the Securities Act
of 1933 (the "Act") may be permitted  to  directors,  officers  and  controlling
persons of the Registrant  pursuant to the foregoing  provisions,  or otherwise,
the  Registrant  has been  advised  that in the  opinion of the  Securities  and
Exchange  Commission such  indemnification is against public policy as expressed
in the Act and is,  therefore,  unenforceable.  In the  event  that a claim  for
indemnification  against  such  liabilities  (other  than  the  payment  by  the
Registrant of expenses  incurred or paid by a director,  officer or  controlling
person of the  Registrant  in the  successful  defense  of any  action,  suit or
proceeding)  is  asserted by such  director,  officer or  controlling  person in
connection with the securities being registered,  the Registrant will, unless in
the opinion of its counsel the matter has been settled by controlling precedent,
submit  to a  court  of  appropriate  jurisdiction  the  question  whether  such
indemnification  by it is against  public policy as expressed in the  Securities
Act and will be governed by the final adjudication of such issue.


                                      II-15
<PAGE>

                                   SIGNATURES

     In accordance  with the  requirements  of the  Securities  Act of 1933, the
Registrant certifies that it has reasonable grounds to believe that it meets all
of the  requirements  for filing on Form SB-2 and authorized  this  Registration
Statement  to be  signed  on its  behalf  by  the  undersigned,  thereunto  duly
authorized,  in the City and County of Denver,  State of  Colorado on August 15,
1998.

                                     ENTROPIN, INC.



                                     By: /s/ Higgins D. Bailey
                                         --------------------------------------
                                         Higgins D. Bailey, Chairman


     In accordance  with the  requirements  of the Securities Act of 1933,  this
Registration Statement was signed by the following persons in the capacities and
on the dates indicated.

Signatures                                Title                      Date
- ----------                                -----                      ----


 /s/ Higgins D Bailey               Chairman of the Board        August 15, 1998
- ---------------------------         of Directors, CEO, CFO
Higgins D. Bailey                   and Director

 /s/ Daniel L. Azarnoff             President and Director       August 15, 1998
- ---------------------------
Daniel L. Azarnoff


 /s/ Wellington A. Ewen             Chief Financial Officer      August 15, 1998
- ---------------------------
Wellington A. Ewen


 /s/ Donald Hunter                  Secretary and Director       August 15, 1998
- ---------------------------
Donald Hunter


 /s/ Dewey H. Crim                  Treasurer and Director       August 15, 1998
- ---------------------------
Dewey H. Crim


/s/ James E. Wynn                   Director                     August 15, 1998
- ---------------------------
James E. Wynn
                                      II-16


Exhibit 5.1
Opinion of Counsel
                       BRENMAN BROMBERG & TENENBAUM, P.C.
                        1775 Sherman Street, Suite 1001
                             Denver, CO 80203-4314
                              Phone (303) 894-0234
                               Fax (303) 839-1633


                                August 17, 1998

The Board of Directors
Entropin, Inc.
45926 Oasis Street
Indio, CA 92201

Re:      Form SB-2 Registration Statement
         Opinion of Counsel

Gentlemen:

         Reference  is  made  to the  registration  statement  (the"Registration
Statement")  on Form SB-2 filed by Entropin,  Inc. (the  "Company") on behalf of
certain shareholders of the Company ("Selling  Shareholders")  (Registration No.
333-51737)  filed  with  the  Securities  and  Exchange   Commission  under  the
Securities Act of 1933 , as amended. The Registration  Statement relates to: (i)
5,754,546  shares of Common Stock of the Company;  and,  (ii) 296,668  Shares of
Common Stock underlying options.

         We have  acted  as  counsel  to the  Company  in  connection  with  the
preparation of the  Registration  Statement  relating to the proposed  resale of
shares of Common Stock by the Selling  Shareholders.  In such capacity,  we have
examined the  originals or copies,  certified  or otherwise  identified,  of the
Articles of Incorporation,  as restated and amended,  and Bylaws, as amended, of
the Company,  corporate  records of the Company,  including  minute books of the
Company as furnished to us by the Company,  certificates of public officials and
of representatives of the Company,  statutes and other records,  instruments and
documents  pertaining  to the  Company as a basis for the  opinions  hereinafter
expressed. In giving such opinions, we have relied upon certificates of officers
of the Company with respect to the accuracy of the factual matters  contained in
such certificates.

         Based upon the  foregoing and subject to the other  qualifications  and
limitations stated in this letter, we are of the opinion that:

         (1)      The Company is a  corporation  duly  incorporated  and validly
                  existing  in good  standing  under  the  laws of the  State of
                  Colorado; and

         (2)      The  shares  of  Common  Stock  to  be  sold  by  the  Selling
                  Shareholders have been duly authorized and are validly issued,
                  fully paid and non-assessable.

         (3)      The  shares of Common  Stock to be  issued to  holders  of the
                  options  and  the  Selling  Shareholders,  upon  exercise  and
                  payment of the exercise price stated in the options


<PAGE>

Entropin, Inc.
July 21, 1998
Page 2
                  held  by  the  Selling  Shareholders,   will  have  been  duly
                  authorized, validly issued, fully paid and non-assessable.

         This  opinion  is a legal  opinion  and not an opinion as to matters of
fact.  This  opinion  is limited  to the laws of the State of  Colorado  and the
federal law of the United States of America,  and to the matters  stated herein.
This  opinion  is made as of the date  hereof,  and  after the date  hereof,  we
undertake  no, and disclaim  any,  obligation to advise you of any change in any
matters  set forth  herein,  and we  express  no opinion as to the effect of any
subsequent  course of dealing or conduct  between the  parties.  This opinion is
furnished to you solely in connection with the transactions  referred to herein,
and may not be  relied  on,  quoted  by or  otherwise  referred  to by any other
person, firm or entity without our prior written consent.

         We hereby consent to the filing of this opinion with the Securities and
Exchange  Commission  as an exhibit  to the  Registration  Statement  and to the
reference to our firm under "Legal Matters" in the Prospectus.

                                        Very truly yours,


                                        /s/ Brenman Bromberg & Tenenbaum, P.C.



               CONSENT OF INDEPENDENT CERTIFIED PUBLIC ACCOUNTANTS



We consent to the use in the  Registration  Statement of Entropin,  Inc. on Form
SB-2 of our report dated  February 22, 1998,  except for Note 9, as to which the
date is March 19,  1998,  and Note 10, as to which the date is August 12,  1998,
relating to the balance sheet of Entropin, Inc. as of December 31, 1996 and 1997
and the related  statements of operations,  stockholders'  equity and cash flows
for the years then ended and for the period  from  August 27,  1984  (inception)
through  December  31, 1997.  We also  consent to the  reference to us under the
heading "Experts" in such Prospectus.



Denver, Colorado                                    CAUSEY DEMGEN & MOORE INC.
August 17, 1998

<TABLE> <S> <C>

<ARTICLE> 5
<LEGEND>
THIS  SCHEDULE  CONTAINS  SUMMARY  FINANCIAL   INFORMATION  EXTRACTED  FROM  THE
REGISTRANT'S FORM SB-2  REGISTRATION  STATEMENT AND IS QUALIFIED IN ITS ENTIRETY
TO SUCH FORM SB-2 REGISTRATION STATEMENT.
</LEGEND>
       
<S>                             <C>                            <C>
<PERIOD-TYPE>                   12-MOS                         6-MOS
<FISCAL-YEAR-END>                          DEC-31-1997                  DEC-31-1998
<PERIOD-END>                               DEC-31-1997                  JUN-30-1998
<CASH>                                             291                      138,715
<SECURITIES>                                         0                            0
<RECEIVABLES>                                    5,000                            0
<ALLOWANCES>                                         0                            0
<INVENTORY>                                          0                            0
<CURRENT-ASSETS>                                 5,921                      138,715
<PP&E>                                               0                        4,227
<DEPRECIATION>                                       0                          282
<TOTAL-ASSETS>                                 282,493                      429,051
<CURRENT-LIABILITIES>                          428,686                      104,593
<BONDS>                                              0                            0
                                0                    3,210,487
                                          0                            0
<COMMON>                                         5,220                        6,000 
<OTHER-SE>                                  (3,517,395)                   3,054,668
<TOTAL-LIABILITY-AND-EQUITY>                   282,493                      429,051
<SALES>                                              0                            0
<TOTAL-REVENUES>                                     0                            0
<CGS>                                                0                            0
<TOTAL-COSTS>                                        0                            0
<OTHER-EXPENSES>                             1,224,062                      699,903
<LOSS-PROVISION>                                     0                            0
<INTEREST-EXPENSE>                             127,386                          937
<INCOME-PRETAX>                            (1,351,448)                     (700,840)
<INCOME-TAX>                                         0                            0
<INCOME-CONTINUING>                        (1,351,448)                     (700,840)
<DISCONTINUED>                                       0                            0
<EXTRAORDINARY>                                      0                            0
<CHANGES>                                            0                            0
<NET-INCOME>                               (1,351,448)                     (700,840)
<EPS-PRIMARY>                                   (.26)                          (.12)
<EPS-DILUTED>                                   (.26)                          (.12)
        

</TABLE>


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