OMNICARE INC
S-8, 1998-02-06
DRUG STORES AND PROPRIETARY STORES
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<PAGE>   1
   As filed with the Securities and Exchange Commission on _____________, 1998

                                                    Registration No. 333-_______

================================================================================

                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

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

                                    FORM S-8
                             REGISTRATION STATEMENT
                                      UNDER
                           THE SECURITIES ACT OF 1933

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

                                 OMNICARE, INC.
             (Exact name of registrant as specified in its charter)



                                    DELAWARE
                                    --------
         (State or other jurisdiction of incorporation or organization)
                                  
                    50 East RiverCenter Blvd. -- Suite 1530
                           Covington, Kentucky                41011
             -------------------------------------------------------
              (Address of Principal Executive Offices)    (Zip Code)

                                   31-1001351
                       ----------------------------------
                      (I.R.S. Employer Identification No.)


     Employment Agreements, dated December 29, 1997, between Omnicare, Inc.
         and Dale B. Evans, Ph.D., Alice G. Stasky, Thomas J. Massey and
              Ronald E. Weishaar, including the associated Warrants

                                Cheryl D. Hodges
                         c/o Omnicare Management Company
                               2800 Chemed Center
                              255 East Fifth Street
                           Cincinnati, Ohio 45202-4728
                     (Name and address of agent for service)

   Telephone number, including area code, of agent for service: (513) 762-6666

                                    copy to:

                                Morton A. Pierce
                              Dewey Ballantine LLP
                           1301 Avenue of the Americas
                            New York, New York 10019
                                 (212) 259-8000

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

                         CALCULATION OF REGISTRATION FEE
<TABLE>
<CAPTION>

- ------------------------------------------------------------------------------------------------------------------------------------
Title of securities         Amount to be            Proposed maximum                  Proposed maximum                 Amount of 
 to be registered           registered        offering price per share(1)         aggregate offering price(1)      registration fee
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                        <C>                          <C>                              <C>                           <C>      
Common Stock par 
value $1.00 per share      280,000 shares               $29.275                          $8,197,000                    $2,418.12
- ------------------------------------------------------------------------------------------------------------------------------------
<FN>

           (1)   Estimated solely for the purpose of calculating the registration fee pursuant to Rule 457(h), based on the exercise
 price of the Warrants.
</TABLE>


<PAGE>   2



                                     PART II

               INFORMATION REQUIRED IN THE REGISTRATION STATEMENT

ITEM 3.           INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

         The following documents heretofore filed with the Commission pursuant
to the Securities Exchange Act of 1934 (the "Exchange Act") are incorporated
herein by reference:

         (a) The Annual Report of Omnicare, Inc. (the "Company") on Form 10-K
for the year ended December 31, 1996;

         (b) All other reports filed by the Company pursuant to Section 13(a) or
15(d) of the Exchange Act since December 31, 1996; and

         (c) The description of the Company's Common Stock set forth in the
Company's Registration Statement on Form 8-A/A-1 (File No. 1-8269) filed with
the Commission on April 17, 1996.

         All documents subsequently filed by the Company pursuant to Sections
13(a), 13(c), 14 and 15(d) of the Exchange Act prior to the filing of a
post-effective amendment which indicates that all Common Stock offered hereunder
has been sold or which deregisters all Common Stock then remaining unsold
hereunder shall be deemed to be incorporated by reference herein and to be a
part hereof from the date of filing of such documents. Any statement contained
in a document incorporated or deemed to be incorporated by reference herein
shall be deemed to be modified or superseded for purposes of this registration
statement to the extent that a statement contained herein, or in any other
subsequently filed document that also is or is deemed to be incorporated by
reference herein, modifies or supersedes such statement. Any such statement so
modified or superseded shall not be deemed, except as so modified or superseded,
to constitute a part of this registration statement.

ITEM 4.  DESCRIPTION OF SECURITIES

         Not applicable.

ITEM 5.  INTERESTS OF NAMED EXPERTS AND COUNSEL

         Not applicable.

ITEM 6.  INDEMNIFICATION OF DIRECTORS AND OFFICERS

         The Restated Certificate of Incorporation and Bylaws of the Company,
and separate Indemnification Agreements, provide for the indemnification of each
director and officer of the Company in connection with any claim, action, suit
or legal proceeding brought or threatened by reason of his or her position with
the Company. In addition, the General Corporation Law of the State of Delaware
("Delaware Law") permits the Company to indemnify its directors, officers and
others against judgments, fines, amounts paid in settlement and attorneys' fees
resulting from various types of legal actions or proceedings if the actions of
the party being indemnified meet the standards of conduct specified in the
Delaware Law.

         The Company's directors and officers are, in addition, insured against
loss arising from any claim against them or a wrongful act or omission with
certain exceptions and limitations.

ITEM 7.  EXEMPTION FROM REGISTRATION CLAIMED.

         Not applicable.

                                       2
<PAGE>   3

ITEM 8.  EXHIBITS.

         See Index to Exhibits on Page 6.

ITEM 9.  UNDERTAKINGS.

The undersigned registrant hereby undertakes:

         (a)(1) To file, during any period in which offers or sales are being
made, a post-effective amendment to this registration statement:

                  (i)      To include any prospectus required by Section
                           10(a)(3) of the Securities Act of 1933;

                  (ii)     To reflect in the prospectus any facts or events
                           arising after the effective date of the registration
                           statement (or the most recent post-effective
                           amendment thereof) which, individually or in the
                           aggregate, represent a fundamental change in the
                           information set forth in the registration statement;

                  (iii)    To include any material information with respect to
                           the plan of distribution not previously disclosed in
                           the registration statement or any material change to
                           such information in the registration statement;

provided, however, that paragraphs (a)(1)(i) and (a)(1)(ii) do not apply if
information required to be included in a post-effective amendment by those
paragraphs is contained in periodic reports filed with or furnished to the
Commission by the registrant pursuant to Section 13 or 15(d) of the Securities
Exchange Act of 1934 that are incorporated by reference in the registration
statement.

           (2) That, for the purpose of determining any liability under the
Securities Act of 1933, each such post-effective amendment shall be deemed to be
a new registration statement relating to the securities offered therein, and the
offering of such securities at that time shall be deemed to be the initial bona
fide offering thereof.

           (3) To remove from registration by means of a post-effective
amendment any of the securities being registered which remain unsold at the
termination of the offering.

         (b) That, for purposes of determining any liability under the
Securities Act of 1933, each filing of the registrant's annual report pursuant
to Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (and, where
applicable, each filing of an employee benefit plan's annual report pursuant to
Section 15(d) of the Securities Exchange Act of 1934) that is incorporated by
reference in the registration statement shall be deemed to be a new registration
statement relating to the securities offered therein, and the offering of such
securities at that time shall be deemed to be the initial bona fide offering
thereof.

         (c) Insofar as indemnification for liabilities arising under the
Securities Act of 1933 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 Commission such
indemnification is against public policy as expressed in the Securities Act of
1933 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 of 1933 and will be governed by the final adjudication of such issue.



                                       3
<PAGE>   4



                                   SIGNATURES

                  Pursuant to 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 S-8 and has duly caused this
Registration Statement to be signed on its behalf by the undersigned, thereunto
duly authorized, in the City of Cincinnati, State of Ohio, on the 6th day of
February, 1998.

                                 OMNICARE, INC.



                                 By /s/ Joel F. Gemunder
                                   ------------------------------------
                                   Joel F. Gemunder
                                   President

                                POWER OF ATTORNEY

                  KNOW ALL PERSONS BY THESE PRESENTS, that each of the person
whose signature appears below hereby constitutes and appoints Edward L. Hutton,
Joel F. Gemunder and Cheryl D. Hodges his or her true and lawful
attorneys-in-fact and agents, with full power of substitution, and each with
power to act alone, to sign and execute on behalf of the undersigned any and all
amendments or supplements to this Registration Statement, and to perform any
acts necessary to be done in order to file any and all such amendments and
supplements with exhibits thereto and other documents in connection therewith,
with the Securities and Exchange Commission, and each of the undersigned does
hereby ratify and confirm all that said attorneys-in-fact and agents, or their
substitutes, shall do or cause to be done by virtue hereof.

                  Pursuant to the requirements of the Securities Act of 1933,
this Registration Statement has been signed by the following persons in the
capacities and on the dates indicated.
<TABLE>
<CAPTION>

          SIGNATURE                     TITLE                                               DATE

<S>                                 <C>                                                <C> 
  /s/ Edward L. Hutton              Chairman and Director                              February 6, 1998
- -------------------------------     (Principal Executive Director)
Edward L. Hutton                    

  /s/ Joel F. Gemunder              President and Director                             February 6, 1998
- -------------------------------     (Principal Executive Officer)
Joel F. Gemunder                    


  /s/ David W. Froesel, Jr.         Senior Vice President and Chief                    February 6, 1998
- -------------------------------     Financial Officer, 
David W. Froesel, Jr.               (Principal Financial Officer and Principal
                                    Accounting Officer)

</TABLE>



                                       4
<PAGE>   5
<TABLE>
<S>                                            <C>                                   <C>
  /s/ Ronald K. Baur                                                                  February 6, 1998
- -------------------------------                Director  
Ronald K. Baur                                           
                                                         
                                                         
  /s/ Kenneth W. Chesterman                                                           February 6, 1998
- -------------------------------                Director  
Kenneth W. Chesterman                                    
                                                         
                                                         
  /s/ Charles H. Erhart, Jr.                                                          February 6, 1998
- -------------------------------                Director  
Charles H. Erhart, Jr.                                   
                                                         

  /s/ Mary Lou Fox                                                                    February 6, 1998
- -------------------------------                Director  
Mary Lou Fox                                             
                                                         
                                                         
  /s/ Cheryl Hodges                                                                   February 6, 1998
- -------------------------------                Director  
Cheryl Hodges                                            
                                                         
                                                         
  /s/ Thomas C. Hutton                                                                February 6, 1998
- -------------------------------                Director  
Thomas C. Hutton                                         
                                                         
                                                         
  /s/ Patrick E. Keefe                                                                February 6, 1998
- -------------------------------                Director  
Patrick E. Keefe                                         
                                                         
                                                         
   /s/ Sandra E. Laney                                                                February 6, 1998
- -------------------------------                Director  
Sandra E. Laney                                          
                                                         
                                                         
  /s/ Andrea R. Lindell                                                               February 6, 1998
- -------------------------------                Director  
Andrea R. Lindell                                        
                                                         
                                                         
  /s/ Sheldon Margen, M.D.                                                            February 6, 1998
- -------------------------------                Director  
Sheldon Margen, M.D.                                

</TABLE>

                                       5
<PAGE>   6

<TABLE>
<S>                                       <C>                                         <C>                            
  /s/ Kevin J. McNamara                                                               February 6, 1998
- -------------------------------           Director  
Kevin J. McNamara                                   

                                                    
  /s/ John M. Mount                                                                   February 6, 1998
- -------------------------------           Director  
John M. Mount                                       

                                                    
  /s/ D. Walter Robbins, Jr.                                                          February 6, 1998
- -------------------------------           Director  
D. Walter Robbins, Jr.                   

</TABLE>




                                       6
<PAGE>   7


                                INDEX TO EXHIBITS

NUMBER

5          Opinion of Dewey Ballantine LLP.

10.1       Employment Agreement, dated as of December 29, 1997, between Omnicare
           and Dale B. Evans, Ph.D, including the associated Warrant.

10.2       Employment Agreement, dated as of December 29, 1997, between Omnicare
           and Alice G. Stasky, including the associated Warrant.

10.3       Employment Agreement, dated as of December 29, 1997, between Omnicare
           and Thomas J. Massey, including the associated Warrant.

10.4       Employment Agreement, dated as of December 29, 1997, between Omnicare
           and Ronald E. Weishaar, including the associated Warrant.

23.1       Consent of Dewey Ballantine LLP (contained in opinion filed as
           Exhibit 5).

23.2       Consent of Price Waterhouse LLP.

23.3       Consent of Ernst & Young LLP.

24         Power of Attorney (included on signature page).




                                       7

<PAGE>   1








                                                                       EXHIBIT 5

                        [Dewey Ballantine LLP Letterhead]

February 6, 1998

Omnicare, Inc.
50 East RiverCenter Blvd. -- Suite 1530
Covington, Kentucky 41011

Gentlemen:

           We have acted as special counsel to Omnicare, Inc., a Delaware
corporation ("Omnicare"), in connection with the filing by Omnicare of a
Registration Statement on Form S-8 (the "Registration Statement") under the
Securities Act of 1933 for the registration of up to 280,000 shares of common
stock, $1.00 par value per share (the "Shares"), of Omnicare which may be issued
upon exercise of the Warrants, dated December 29, 1997 (the "Warrants"), to
purchase an aggregate of 280,000 Shares granted under the Employment Agreements,
dated as of December 29, 1997, between Omnicare, Inc. and Dale B. Evans, Ph.D.,
Alice G. Stasky, Thomas J. Massey and Ronald E. Weishaar.

           For the purpose of rendering the opinion set forth herein, we have
been furnished with and examined such certificates and other documents as we
have deemed necessary or advisable for the purpose of expressing the opinion
contained herein.

           With respect to all of the documents reviewed, we have assumed,
without investigation, the genuineness of all signatures, the authenticity of
all documents submitted to us as originals and the conformity to originals of
all documents submitted to us as certified or reproduced copies.

           We are admitted to the Bar of the State of New York and express no
opinion as to the laws of any other jurisdiction other than the General
Corporation Law of the State of Delaware.

           Based on and subject to the foregoing, we are of the opinion that the
issuance of the Shares upon exercise of the Warrants has been duly authorized by
Omnicare and when the Shares have been issued as authorized in accordance with
the terms of the Warrants, the Shares will be validly issued, fully paid and
nonassessable.

           We hereby consent to the filing of this opinion as Exhibit 5 to the
Registration Statement. In giving such consent, we do not thereby admit that we
come within the category of persons whose consent is required under Section 7 of
the Securities Act of 1933 or the rules and regulations of the Securities and
Exchange Commission thereunder.

                                        Very truly yours,


                                        /s/ Dewey Ballantine LLP


                                        DEWEY BALLANTINE LLP




                                       

<PAGE>   1





                                                                    EXHIBIT 10.1

                              EMPLOYMENT AGREEMENT

           THIS EMPLOYMENT AGREEMENT (this "Agreement") is made this 29th day of
December, 1997, by and between Dale B. Evans, Ph.D. ("Executive") and COROMED,
Inc., a Delaware corporation (the "Company");

           WHEREAS, pursuant to the Amended and Restated Agreement and Plan of
Merger, dated as of August 19, 1997, as amended as of November 4, 1997 (the
"Merger Agreement"), among Omnicare, Inc., a Delaware corporation ("Omnicare"),
Coromed Acquisition Corporation, a Delaware corporation and a wholly-owned
subsidiary of Omnicare ("Merger Sub"), the Company and certain stockholders of
the Company, Merger Sub will be merged with and into the Company with the
Company surviving the merger as a wholly-owned subsidiary of Omnicare;

           WHEREAS, the Company previously employed the Executive as President
and Chief Executive Officer;

           WHEREAS, the Company is a contract research organization ("CRO")
providing contract research services to third parties of the type identified
below and desires to continue to employ Executive as its President and Chief
Executive Officer for the purpose of engaging in its business of researching,
developing and testing of pharmaceuticals, therapeutics, medical devices and
diagnostics, the development and management of study designs, systems and
procedures, data management, clinical and statistical analysis, biochemical
analyses, chemical synthesis, validation, evaluation, support services,
regulatory submissions and marketing and post-marketing support in relation to
any such products (the "Business"), and Executive desires to be employed by the
Company for such purpose; and

           WHEREAS, the Executive shall have access to confidential financial
information, trade secrets and other confidential and proprietary information of
the Company and Omnicare and its subsidiaries.

           NOW, THEREFORE, in consideration of these recitals and the mutual
covenants and agreements hereinafter set forth, and other good and valuable
consideration, the receipt and sufficiency of which are hereby acknowledged, the
parties hereto agree as follows:
<PAGE>   2

SECTION 1:  EMPLOYMENT
- ----------  ----------

           1.1 DUTIES. The Company shall employ Executive as President and Chief
Executive Officer of the Company upon the terms and conditions set forth in this
Agreement. Executive shall have such duties as are customary for such office and
which may be assigned to Executive from time to time by the Company. The Company
shall use its reasonable best efforts to nominate and elect the Executive as a
member of the board of directors of the Company for one term of one year
commencing as soon as practicable after the date hereof. The principal place of
the business of the Executive during the term of the Agreement shall be in the
greater Albany, New York area.

           1.2 BEST EFFORTS. Executive agrees to devote his best efforts and his
full time and attention to the performance of his duties under this Agreement,
and to perform such duties in a trustworthy and businesslike manner. In
addition, Executive agrees that he shall not, directly or indirectly, engage or
participate in, or become employed by or render advisory or consulting services
or other services in connection with, any business activity other than that of
the Company, whether or not such business activity is pursued for gain, profit
or other advantage, without the prior consent of the Company. In addition to the
performance of his duties for the Company, Executive agrees to perform such
additional services for the Company as the board of directors of the Company
reasonably may request and which are consistent with his position as President
and Chief Executive Officer of the Company. 

           1.3 DUTY TO ACT IN THE BEST INTEREST OF THE COMPANY. Executive shall
not act in any manner, directly or indirectly, which may damage the business of
the Company or its affiliates or which would adversely affect the goodwill,
reputation or business relations of the Company or its affiliates with their
customers, the public generally or with any of their other employees. 

SECTION 2: TERM OF EMPLOYMENT

           2.1 TERM. The term of Executive's employment with the Company shall
commence as of the Effective Time, as defined in the Merger Agreement, and shall
continue for a period of five (5) years from the Effective Time (the "Initial
Term"). Commencing not less than one month before the end of the Initial Term or
any additional term, if either party so desires, the Company and the Executive
shall negotiate in good faith to renew this Agreement for a one-year period on
terms and conditions set forth in the Agreement. This Agreement and Executive's
employment also may be terminated as provided for in Sections 2.2, 2.3 or 2.4 of
this Agreement.

           2.2 TERMINATION FOR CAUSE. The Company shall have the right to
terminate Executive's employment hereunder for the following causes (a
"Termination for Cause"):

           (a)        Conviction of Executive for, or entry of a plea of guilty
                      or nolo contendere by Executive with respect to, any
                      felony or any crime involving an act of moral turpitude;

           (b)        Commission by Executive of any act of fraud toward the
                      Company or any of its affiliates;

           (c)        Conduct which is materially detrimental to the reputation,
                      goodwill or business operations of the Company or its
                      affiliates;

           (d)        Neglect by Executive of his duties or breach by Executive
                      of his duties or intentional misconduct by Executive in
                      discharging such duties, in each case which is material in
                      the context of his employment relationship with the
                      Company;

                                       2
<PAGE>   3

           (e)        Executive's continued absence from his duties without the
                      consent of the board of directors of the Company after
                      receipt of notification from the board referring to this
                      clause, other than absence due to bona fide illness or
                      disability, as defined herein;

           (f)        Executive's failure or refusal to comply with the
                      directions of the board of directors of the Company or
                      with the policies, standards and regulations of the
                      Company or its affiliates, provided that such directions,
                      policies, standards or regulations do not require
                      Executive (i) to take any action which is illegal, immoral
                      or unethical or (ii) to fail to take any action required
                      by applicable law, regulations or licensing standards, in
                      each case where such failure or refusal to comply
                      continues after receipt of the notification from the board
                      of directors referring to this clause; or

           (g)        Executive's breach of the restrictive covenants set forth
                      in Section 5 of this Agreement, in such case where such
                      breach continues after a five (5) day period immediately
                      following receipt of notification from the board of
                      directors of the Company referring to this clause.

Upon the effectiveness of any Termination for Cause by the Company, payment of
all compensation to Executive under this Agreement shall cease immediately
(except for any payment of compensation accrued but unpaid through the date of
such Termination for Cause).

           2.3 TERMINATION BY THE COMPANY WITHOUT CAUSE. The Company shall have
the right to terminate this Agreement and Executive's employment without cause
upon ten (10) days' prior written notice to Executive. If the Company terminates
this Agreement and Executive's employment without cause pursuant to this Section
2.3, Executive shall receive his Base Compensation, as that term is defined in
Section 3.1 of this Agreement, for the remainder of the then current term of
this Agreement. Upon such termination, Executive shall not receive any further
compensation pursuant to Sections 3.2 or 3.3 of this Agreement, except as
required by law. In the event of termination without cause, Executive
acknowledges that the Company shall have no liability to him whatsoever other
than its obligation to pay him his Base Compensation for the remainder of the
then current term of this Agreement pursuant to Section 3.1.

           2.4 TERMINATION DUE TO DISABILITY OR DEATH. If Executive is unable to
perform his duties under this Agreement by reason of physical or mental
disability, this Agreement shall terminate, and, upon such termination,
Executive shall continue to receive the compensation described in Section 3 of
this Agreement, reduced by any disability payment received under a Company plan
or policy to which Executive may be entitled in lieu of such compensation, for a
period of six (6) months following termination. At the expiration of the six (6)
month period, payment of all compensation to Executive under this Agreement
shall cease immediately (except for any payment of compensation accrued but
unpaid through that date). The term "disability" as used herein shall mean a
condition which prohibits Executive from performing his duties substantially in
the manner he is capable of performing them on the date of this Agreement, which
cannot be removed by reasonable accommodations on the part of the Company, for
ninety (90) days or more during any one (1) year period.

           If Executive should die during the term of this Agreement, this
Agreement shall terminate and all payments to Executive under this Agreement
shall cease immediately (except for any such payments accrued but unpaid through
the date of death).

                                       3
<PAGE>   4

SECTION 3: COMPENSATION
- -----------------------

           3.1 BASE COMPENSATION. Subject to Sections 2 and 5.5 of this
Agreement, during the term of this Agreement, the Company shall pay to Executive
an initial annual salary of $185,709 ("Base Compensation"), such annual salary
to be reviewed for increase, if any, by the Company in accordance with Company
policies but not less frequently than intervals of fourteen (14) months from
August 1, 1996. The Base Compensation shall be paid in conformity with the
Company's policy relating to salaried employees and shall be subject to all
required deductions and withholdings.

           3.2 REIMBURSEMENT OF BUSINESS EXPENSES During the term of this
Agreement, the Company shall reimburse Executive for all ordinary and reasonable
business expenses incurred by him in connection with the Business. Reimbursement
of such expenses shall be paid monthly, upon submission by Executive to the
Company of vouchers itemizing such expenses in a form conforming to Company
policy.

           3.3 BENEFITS. During the term of this Agreement, Executive shall be
entitled to such insurance, medical, savings and investment plans, sick leave,
holiday, education and continuing education assistance and other benefits as may
be given from time to time to other similarly-situated employees of the Company,
as determined from time to time by the Company. Executive shall be entitled to a
number of vacation days in accordance with Company policy. Executive may request
unpaid leave benefits at any time, which benefits may be granted at the sole
discretion of the board of directors of the Company.

SECTION 4: ALL BUSINESS TO BE THE PROPERTY OF THE COMPANY; ASSIGNMENT
- ---------------------------------------------------------------------

           Executive agrees that the Business and all business developed by him
relating to the Business, including, without limitation, software, contracts,
fees, commissions, customer lists and any other incident of any business
developed or sought by the Company or its affiliates, or earned or carried on by
Executive for the Company, are and shall be the exclusive property of the
Company for its sole use.

           Executive hereby grants and assigns to the Company (without
additional compensation) his entire right, title and interest under applicable
laws in and to all software products and modifications thereto, inventions,
patents, patent applications, research, information, customer lists, all other
technical and research data, and copyrighted material made, conceived, developed
or acquired by him solely or jointly with others during the period of his
employment by the Company, but only to the extent the foregoing pertains to the
Business.

SECTION 5: COVENANTS OF NONDISCLOSURE, NONSOLICITATION AND NONCOMPETITION
- -------------------------------------------------------------------------

           5.1 NONDISCLOSURE. During the term of his employment with the Company
and for five (5) years after the termination of his employment with the Company
for any reason, Executive shall not, and Executive shall use his best efforts
(which best efforts shall include, without limitation, notifying the board of
directors of the Company of any suspected breach of this Section 5.1) to ensure
that any persons or entities over which Executive has control do not, directly
or indirectly, use any proprietary and confidential information of the Company
or its affiliates for any purpose not associated with activities of the Company
or its affiliates, or disseminate or disclose any such information to any person
or entity not affiliated or associated with the Company. Such proprietary and
confidential information includes, without limitation, sales methods,
prospecting methods, customer lists, computer technology, programs and data,
whether on-line or off-loaded on disk format, methods of presentation and any
other plans, programs and materials used in managing, marketing or furthering
the business of the Company and its affiliates. Upon termination of Executive's
employment relationship with the Company, Executive shall return to the Company
all documents, records, notebooks, manuals, computer disks and similar
repositories of or containing the proprietary and confidential information of
the Company or its affiliates, 

                                       4
<PAGE>   5

including all copies thereof, then in Executive's possession or control, whether
prepared by Executive or otherwise. Executive shall undertake all reasonably
necessary and appropriate steps to insure that the confidentiality of
proprietary and confidential information of the Company and its affiliates shall
be maintained.

           5.2 NONSOLICITATION. For a period of five (5) years after the
termination of Executive's employment with the Company for any reason, Executive
shall not (i) solicit, service or in any way or to any degree handle (other than
as are permitted in Section 5.3) any business similar to that performed by
Executive for the Company or its affiliates, for any person, firm or entity
which is a customer or actively marketed prospect of the Company or such
affiliates for which the Executive has performed services or which becomes a
customer or actively marketed prospect of the Company or such affiliates during
the term of Executive's employment, whether or not a customer or prospect of the
Company shall have been handled, serviced or produced by Executive, (ii) divert
or attempt to divert any such customer or prospect or (iii) announce or
advertise to the general public his former employment by or connections with the
Company or its affiliates. For purposes of this Section 5.2, the term customer
shall not include any entity which has not conducted business with the Company
or any such affiliate during the three-year period immediately preceding the
Executive's termination of employment.

           For a period of five (5) years after the termination of Executive's
employment with the Company for any reason, Executive shall not solicit, take
away, hire, employ or endeavor to employ any of the employees of the Company or
any of its affiliates for which the Executive has performed services.

           5.3 NONCOMPETITION. Executive acknowledges that the Business was
conducted prior to the date of this Agreement by the Company throughout North
America, South America and Europe (the "Restricted Area") and, therefore, agrees
that, during the term of his employment with the Company and for five (5) years
after the termination of his employment with the Company for any reason, he
shall not, without the prior written consent of the Company, directly or
indirectly, own, develop, manage, operate, join, control or participate in the
ownership, management, operation or control of, or become an employee or
independent contractor of, or consultant to, any business which competes with
the Business as conducted by the Company or any of its subsidiary companies, or
any of its successors in the past, during the term of Executive's employment
hereunder, for the duration of Executive's agreement not to compete pursuant to
this Section 5.3., by selling such products, or providing such services, as the
Company, or any of its subsidiary companies, or any of its successors, sells or
provides. This restriction will apply within the Restricted Area. The foregoing
notwithstanding, nothing herein shall be construed so as to prohibit or restrict
Executive from (i) activities of the type described above where the business is
not a CRO (or is not then contemplated to be a CRO) but is a manufacturer of
pharmaceuticals, therapeutics or diagnostics provided that such manufacturer is
not a customer for which the Business has provided services within the one-year
period preceding the Executive's employment with the manufacturer, or (ii)
owning less than five percent (5%) of the outstanding common stock of any
corporation, the stock of which is publicly traded on a national securities
exchange or in the over-the-counter market, that competes with the Company.
Executive further agrees that, during his employment with the Company, he shall
use his best efforts to preserve the Business and the organization of the
Company, to keep available to the Company the services of its employees, and to
preserve for the Company its and his favorable business relationships with
suppliers, customers and others with whom the Company and Executive have
business relationships.

           5.4 APPLICABILITY. The provisions of Sections 5.1, 5.2 and 5.3 of
this Agreement shall apply to all terminations of Executive's employment with
the Company, regardless of the cause or circumstances thereof and whether such
termination was voluntary or involuntary, for cause or without cause, provided
the Company complies in all material respects with Section 2.3. Further,
Executive's covenants of nondisclosure, noncompetition and nonsolicitation,
along with the Company's remedies for the breach or threatened breach of those
covenants, shall remain in effect following the termination of this Agreement
and Executive's employment, regardless of the cause or circumstances thereof and
whether such

                                       5

                                       
<PAGE>   6

termination was voluntary or involuntary, for cause or without cause, provided
the Company in all respects complies with Section 2.3.

           5.5 REMEDIES. In view of the services which Executive will perform
for the Company, which are special, unique, extraordinary and intellectual in
character, which place him in a position of confidence and trust with the
customers and employees of the Company and its affiliates, and which provide him
with access to confidential financial information, trade secrets, "know-how" and
other confidential and proprietary information of the Company and its
affiliates, in view of the geographic scope and nature of the business in which
the Company and its affiliates are engaged, and recognizing the value of this
Agreement to him, Executive expressly acknowledges that the restrictive
covenants set forth in this Agreement, including, without limitation, the
geographic scope of such covenants, are necessary in order to protect and
maintain the proprietary interests and other legitimate business interests of
the Company and its affiliates, and that the enforcement of such restrictive
covenants shall not prevent him from earning a livelihood. Executive also
acknowledges that the scope of the operations of the Company and its affiliates
are such that it is reasonable that the restrictions set forth in this Agreement
are not more limited as to geographic area than is set forth herein. Executive
further acknowledges that the remedy at law for any breach or threatened breach
of this Agreement will be inadequate and, accordingly, that the Company, in
addition to all other available remedies (including, without limitation, seeking
such damages as they have sustained by reason of such breach), shall be entitled
to injunctive or any other appropriate form of equitable relief. Notwithstanding
anything in this Agreement to the contrary, in the event Executive breaches any
of the covenants of nondisclosure, nonsolicitation or noncompetition set forth
in Sections 5.1, 5.2 and 5.3 of this Agreement, he shall not receive any further
payments from the Company pursuant to this Agreement. The Company shall be
entitled to seek a restraining order or injunction in any court of competent
jurisdiction to prevent any continuation of any violation of the provisions of
this Section 5 and the Executive hereby consents that such restraining order or
injunction may be granted without the necessity of the posting of any bond by
the Company. 

SECTION 6: WARRANTS

           Upon commencement of and as compensation, in part, for Executive's
employment pursuant to this Agreement, Executive shall be granted warrants to
purchase 100,000 shares of the common stock, par value $1.00 per share, of
Omnicare (the "Omnicare Common Stock"). The warrants shall be substantially in
the form attached hereto as Exhibit A. The Executive shall comply with the terms
of the warrants.

SECTION 7: MISCELLANEOUS PROVISIONS

           7.1 ASSIGNMENT AND SUCCESSORS. If the Company sells all or
substantially all of the assets of the Business, the rights and obligations of
the Company under this Agreement may be assigned without Executive's consent. In
all other circumstances, the rights and obligations of the Company under this
Agreement may be assigned with Executive's consent (which shall not be
unreasonably withheld) and shall inure to the benefit of and be binding upon the
successors and assigns of the Company. Executive's obligation to provide
services hereunder may not be assigned to or assumed by any other person or
entity, except as provided above.

           7.2 NOTICES. All notices, requests, demands, or other communications
under this Agreement shall be in writing and shall be delivered by hand or
mailed, by fax (receipt confirmed), by express mail services or by registered or
certified mail, postage prepaid, to the Company c/o Omnicare, Inc., 2800 Chemed
Center, 255 East Fifth Street, Cincinnati, Ohio 45202, and to Executive at his
address as shown in the Company's records. Notices, requests, demands, and other
communications so delivered shall be deemed given upon receipt.

           7.3 SEVERABILITY. If any provision or portion of this Agreement shall
be or become illegal, invalid or unenforceable in whole or in part for any
reason, such provision shall be ineffective only to the


                                       6
                                       
<PAGE>   7

extent of such illegality, invalidity or unenforceability, without invalidating
the remainder of such provision or the remaining provisions of this Agreement.
If any court of competent jurisdiction should deem any covenant herein to be
invalid, illegal or unenforceable because its scope is considered excessive,
such covenant shall be modified so that the scope of the covenant is reduced
only to the minimum extent necessary to render the modified covenant valid,
legal and enforceable.

           7.4 INTEGRATION, AMENDMENT AND WAIVER. This Agreement constitutes the
entire agreement among the parties hereto, superseding all prior arrangements
and agreements, and may be modified, amended or waived only by a written
instrument signed by the parties hereto.

           7.5 GOVERNING LAW. This Agreement shall be construed in accordance
with and governed for all purposes by the laws of the State of Ohio applicable
to contracts executed and wholly-performed within such State.

           7.6 INTERPRETATION. The headings contained in this Agreement are for
reference purposes only, and shall not affect in any way the meaning or
interpretation of this Agreement. The language in all parts of this Agreement
shall in all cases be construed according to its fair meaning, and not strictly
for or against any party hereto. In this Agreement, unless the context otherwise
requires, the singular and the plural include one another.

           7.7 NON-WAIVER OF RIGHTS AND BREACHES. No failure or delay of any
party herein in the exercise of any right given to such party hereunder shall
constitute a waiver thereof unless the time specified herein for the exercise of
such right has expired, nor shall any single or partial exercise of any right
preclude other or further exercise thereof or of any other right. The waiver by
a party hereto of any default of any other party shall not be deemed to be a
waiver of any subsequent default or other default by such party.

           7.8  DISPUTE RESOLUTION.

                  (a)      (i) Any dispute, controversy or claim arising out of
                           or relating to this Agreement or any term or
                           provision of this Agreement, including, without
                           limitation, any claim of breach, termination or
                           invalidity thereof, (ii) any matter subject to
                           arbitration under any provision of this Agreement and
                           (iii) any other matter which the parties agree to
                           submit to arbitration shall be settled by arbitration
                           in accordance with the Commercial Arbitration Rules
                           of the American Arbitration Association, and judgment
                           on the award rendered by the arbitrator(s) may be
                           entered in any court having jurisdiction thereof.
                           Such arbitration proceedings shall be held in the
                           State of Ohio.

                  (b)      Notwithstanding the foregoing, the Company at all
                           times shall have the right to bring an action to
                           enforce the covenants and seek the remedies set forth
                           in Section 5 of this Agreement (other than an action
                           for monetary damages which is covered by the dispute
                           resolution provisions of Section 7.8(a) provided that
                           any arbitration proceedings for monetary damages
                           sought in connection with an injunction or other
                           equitable relief shall be under the supervision of
                           the court in which such relief is sought) through the
                           courts as they deem necessary or desirable in order
                           to protect their confidential or proprietary
                           information or to prevent the occurrence of any event
                           which the Company believes will cause them to suffer
                           immediate and irreparable harm or damage. The parties
                           agree that any such action may be brought in a state
                           or federal court located within Cincinnati, Ohio. The
                           parties waive any and all objections to jurisdiction
                           or venue. The parties further agree that service of
                           process may be made by

                                       7
<PAGE>   8

                           registered mail to the address referred to in Section
                           7.2 of this Agreement, and that such service shall be
                           deemed effective service of process. 

         7.9 COUNTERPARTS. This Agreement may be executed in any number of
counterparts by the parties hereto, each of which when so executed shall be
deemed an original and all of which taken together shall constitute one and the
same instrument.


                                       8
<PAGE>   9



                                        

     IN WITNESS WHEREOF, the parties hereto have executed this Agreement as of
the date first written above.

                                        COROMED, INC.

                                        By: /s/ Dale B. Evans
                                          -------------------------
                                          Name: Dale B. Evans
                                          Title: President and CEO


                                        Executive: Dale B. Evans, Ph.D.


                                        By: /s/ Dale B. Evans
                                          -------------------------


                                        S.S. No. ###-##-####
                                                 ------------------


                                       9
<PAGE>   10






THIS WARRANT AND THE SECURITIES TO BE ISSUED UPON EXERCISE HEREOF HAVE NOT BEEN
REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT"),
OR THE SECURITIES LAWS OF ANY STATE. THIS WARRANT MAY NOT BE OFFERED, SOLD,
TRANSFERRED, PLEDGED OR HYPOTHECATED. THE SECURITIES ISSUABLE UPON EXERCISE
HEREOF MAY NOT BE OFFERED, SOLD, TRANSFERRED, PLEDGED, HYPOTHECATED OR OTHERWISE
DISPOSED OF EXCEPT PURSUANT TO (I) AN EFFECTIVE REGISTRATION STATEMENT UNDER THE
SECURITIES ACT AND ANY APPLICABLE STATE SECURITIES LAWS, (II) TO THE EXTENT
APPLICABLE, RULE 144 UNDER THE SECURITIES ACT (OR ANY SIMILAR RULE UNDER THE
SECURITIES ACT RELATING TO THE DISPOSITION OF SECURITIES) OR (III) AN OPINION OF
COUNSEL, IF SUCH OPINION SHALL BE REASONABLY SATISFACTORY TO COUNSEL TO THE
ISSUER, THAT AN EXEMPTION FROM REGISTRATION UNDER THE SECURITIES ACT AND
APPLICABLE STATE LAW IS AVAILABLE.

                                   Dated: December 29, 1997
                                   No: ____

                                     WARRANT

To Purchase up to an aggregate of 100,000 shares of Common Stock, $1.00 par
value ("Common Stock"), of

                                 OMNICARE, INC.
                                 --------------

         THIS IS TO CERTIFY THAT, for value received, Dale B. Evans, Ph.D.
(hereinafter referred to as the "Holder"), is entitled to purchase from
Omnicare, Inc., a Delaware Corporation (the "Company"), at any time and from
time to time during the period from the date hereof to and including the
Expiration Date, at the offices of the Warrant Agent (as hereinafter defined),
at the Exercise Price (as hereinafter defined), up to an aggregate of 100,000
shares of Common Stock, subject to adjustment and upon the terms and conditions
as hereinafter provided, and is also entitled to exercise the other appurtenant
rights, powers and privileges hereinafter described.

         This Warrant is being issued in connection with that certain Employment
Agreement between Coromed, Inc., a Delaware corporation and a wholly owned
subsidiary of the Company ("Coromed"), and the Holder, dated as of the date
hereof (the "Employment Agreement").

         Certain terms used in this Warrant are defined in Article V.

                                   ARTICLE I

                               EXERCISE OF WARRANT

         1.1 METHOD OF EXERCISE. To exercise this Warrant in whole or in part,
the Holder shall deliver to the Company, at the Warrant Agent, (a) this Warrant,
(b) a written notice, in substantially the form of the Subscription Notice
attached hereto as Exhibit A, of such Holder's election to exercise this
Warrant, which notice shall specify the number of shares of Common Stock to be
purchased (in lots of not less than 1,000 shares), the denominations of the
share certificate or certificates desired and the name or names in which such
certificates are to be registered and (c) payment of the Exercise Price with
respect to such shares. Such payment may be made, at the option of the Holder,
by cash, certified or bank cashier's check or wire transfer.

         In addition to and at the time of payment of the Exercise Price, the
Holder shall pay to the Company the full amount of all federal and state
withholding and other employment taxes applicable to the taxable income of such
Holder resulting from such exercise.

                                       
<PAGE>   11

         The Company shall as promptly as practicable and in any event within
five (5) Business Days after receipt of the Subscription Notice, execute and
deliver or cause to be executed and delivered, in accordance with such notice, a
certificate or certificates representing the aggregate number of shares of
Common Stock to which the Holder is entitled. The share certificate or
certificates so delivered shall be in such denominations as may be specified in
such notice or, if such notice shall not specify denominations, in denominations
of 1,000 shares each, and shall be issued in the name of the Holder or such
other name or names as shall be designated in such notice. Such certificate or
certificates shall be deemed to have been issued, and the Holder or any other
person so designated to be named therein shall be deemed for all purposes to
have become holders of record of such shares, as of the date the aforementioned
notice is received by the Company. If this Warrant shall have been exercised
only in part, the Company shall, at the time of delivery of the certificate or
certificates, deliver to the Holder a new Warrant evidencing the rights to
purchase the remaining shares of Common Stock called for by this Warrant, which
new Warrant shall in all other respects be identical with this Warrant, or, at
the request of the Holder, appropriate notation may be made on this Warrant
which shall then be returned to the Holder. The Company shall pay all expenses,
taxes and other charges payable in connection with the preparation, issuance and
delivery of share certificates and new Warrants, except that, if share
certificates shall be registered in a name or names other than the name of the
Holder, funds sufficient to pay all transfer taxes payable as a result of such
transfer shall be paid by the Holder at the time of delivering the
aforementioned notice of exercise or promptly upon receipt of a written request
of the Company for payment.

         1.2 SHARES TO BE FULLY PAID AND NONASSESSABLE; RESERVATION AND LISTING.
All shares of Common Stock issued upon the exercise of this Warrant shall be
validly issued, fully paid and nonassessable and the Company shall at all times
reserve and keep available out of its authorized shares of Common Stock, solely
for the purpose of issuance upon the exercise of this Warrant, such number of
shares of Common Stock as shall be exercisable hereof. If the Common Stock of
any class is then listed on any national securities exchange (as such term is
used in the Exchange Act (as defined herein)) or quoted on Nasdaq, the Company
shall cause the shares of Common Stock issuable upon exercise of this Warrant to
be duly listed or quoted thereon, as the case may be.

         1.3 NO FRACTIONAL SHARES TO BE ISSUED. The Company shall not be
required to issue fractions of shares of Common Stock upon exercise of this
Warrant. If any fraction of a share would, but for this Section, be issuable
upon any exercise of this Warrant, in lieu of such fractional share the Company
shall pay to the Holder in cash, an amount equal to the same fraction of the
current Market Price per share of outstanding Common Stock on the Business Day
immediately prior to the date of such exercise.

         1.4 SHARE LEGEND. Each certificate for shares of Common Stock issued
upon exercise of this Warrant, unless at the time of exercise such shares are
registered under the Securities Act, shall bear the following legend:

                  THIS SECURITY HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT
         OF 1933, AS AMENDED (THE "SECURITIES ACT"), OR THE SECURITIES LAWS OF
         ANY STATE AND MAY NOT BE OFFERED, SOLD, TRANSFERRED, PLEDGED,
         HYPOTHECATED EXCEPT PURSUANT TO (I) AN EFFECTIVE REGISTRATION STATEMENT
         UNDER THE SECURITIES ACT AND ANY APPLICABLE STATE SECURITIES LAWS, (II)
         TO THE EXTENT APPLICABLE, RULE 144 UNDER THE SECURITIES ACT (OR ANY
         SIMILAR RULE UNDER THE SECURITIES ACT RELATING TO THE DISPOSITION OF
         SECURITIES), OR (III) AN OPINION OF COUNSEL, IF SUCH OPINION SHALL BE
         REASONABLY SATISFACTORY TO COUNSEL TO THE ISSUER, THAT AN EXEMPTION
         FROM REGISTRATION UNDER THE SECURITIES ACT AND APPLICABLE STATE LAW IS
         AVAILABLE.

         Any certificate issued at any time in exchange or substitution for any
certificate bearing such legend (except a new certificate issued upon completion
of a public distribution pursuant to a registration statement under the
Securities Act) shall also bear such legend unless, in the opinion of 


                                       2
<PAGE>   12


counsel selected by the holder of such certificate and reasonably acceptable to
counsel to the Company, the securities represented thereby need no longer be
subject to restrictions on resale under the Securities Act or any state
securities laws.

                                   ARTICLE II

                        WARRANT AGENT; TRANSFER, EXCHANGE
                           AND REPLACEMENT OF WARRANTS

         2.1 WARRANT AGENT. Until such time, if any, as an independent agent
shall be appointed by the Company to perform services with respect to the
Warrant described herein (the "Warrant Agent"), the Company shall perform the
obligations of the Warrant Agent provided herein at its principal office address
or such other address in the United States as the Company shall specify by prior
written notice to the Holder.

         2.2 OWNERSHIP OF WARRANT. The Company shall treat the Holder as the
holder and owner hereof for all purposes (and shall not be affected by any
notice to the contrary which shall not be effective). 

         2.3 NO TRANSFER. The Holder of this Warrant, by its acceptance hereof,
covenants and agrees that such Warrant may not be sold, transferred, pledged or
hypothecated. The Common Stock issuable upon exercise hereof may not be sold,
transferred, pledged, hypothecated or otherwise disposed of unless registered
pursuant to the Securities Act or the Company shall have been supplied with an
opinion of counsel reasonably satisfactory to the Company's counsel that such
transfer is not in violation of the Securities Act and any applicable state
laws.

         2.4 DIVISION OR COMBINATION OF WARRANTS. This Warrant may be divided
(in lots exercisable for not less than 1,000 shares of Common Stock) or combined
with other Warrants upon surrender hereof. The Company shall execute and deliver
a new Warrant or Warrants in exchange for the Warrant or Warrants to be divided
or combined in accordance with such notice. 

         2.5 LOSS, THEFT, DESTRUCTION OF WARRANT CERTIFICATES. Upon receipt of
evidence satisfactory to the Company of the loss, theft, destruction or
mutilation of any Warrant and, in the case of any such loss, theft or
destruction, upon receipt of indemnity or security satisfactory to the Company,
or, in the case of any such mutilation, upon surrender and cancellation of such
Warrant, the Company, at Holder's expense, will make and deliver, in lieu of
such lost, stolen, destroyed or mutilated Warrant, a new Warrant of like tenor
and representing the right to purchase the same aggregate number of shares of
Common Stock. 

                                  ARTICLE III

                              ADJUSTMENT PROVISIONS

         3.1 ADJUSTMENTS GENERALLY. The Exercise Price and the number of shares
of Common Stock (or other securities or property) issuable upon exercise of this
Warrant shall be subject to adjustment from time to time upon the occurrence of
certain events, as provided in this Article III.

         3.2 COMMON STOCK REORGANIZATIONS AND DISTRIBUTIONS. If the Company
shall (i) subdivide its outstanding shares of Common Stock into a greater number
of shares or consolidate its outstanding shares of Common Stock into a smaller
number of shares (any such event being called a "Common Stock Reorganization")
or (ii) pay a dividend in shares of Common Stock or make a distribution in
shares of Common Stock on its outstanding shares of Common Stock, other than
pursuant


                                       3
<PAGE>   13

to a Common Stock Reorganization (any such event being herein called a "Common
Stock Distribution"), then (A) the Exercise Price shall be adjusted, effective
immediately after the record date at which the holders of Common Stock are
determined for purposes of such Common Stock Reorganization or Common Stock
Distribution, to a price determined by multiplying the Exercise Price in effect
immediately prior to such record date by a fraction, the numerator of which
shall be the number of shares of Common Stock outstanding on such record date
before giving effect to such Common Stock Reorganization or Common Stock
Distribution and the denominator of which shall be the number of shares of
Common Stock outstanding after giving effect to such Common Stock Reorganization
or Common Stock Distribution, and (B) the number of shares of Common Stock
subject to purchase upon exercise of this Warrant shall be adjusted, effective
at such time, to a number determined by multiplying the number of shares of
Common Stock subject to purchase immediately before such Common Stock
Reorganization or Common Stock Distribution by a fraction, the numerator of
which shall be the number of shares outstanding after giving effect to such
Common Stock Reorganization or Common Stock Distribution and the denominator of
which shall be the number of shares of Common Stock outstanding immediately
before such Common Stock Reorganization or Common Stock Distribution. 

         3.3 ADJUSTMENT RULES.

         (a) Any adjustments pursuant to this Article III shall be made
successively whenever an event referred to herein shall occur.

         (b) No adjustment shall be made pursuant to this Article III in respect
of the issuance from time to time of Common Stock upon the exercise of this
Warrant.

         (c) If the Company shall set a record date to determine the holders of
Common Stock for purposes of a Common Stock Reorganization or Common Stock
Distribution and shall legally abandon such action prior to effecting such
action, then no adjustment shall be made pursuant to this Article III in respect
of such action. 

         3.4 NOTICE OF ADJUSTMENT. As promptly as practicable after any action
is taken which requires an adjustment or readjustment pursuant to this Article
III, the Company shall give notice to the Holder of such event, and, if
determinable, the required adjustment and the computation thereof. If the
required adjustment is not determinable at the time of such notice, the Company
shall give notice to the Holder of such adjustment and computation promptly
after such adjustment becomes determinable.

                                   ARTICLE IV

                              FORM S-8 REGISTRATION

         4.1 FORM S-8 REGISTRATION. As promptly as reasonably practicable after
the Closing Date, the Company will prepare and file a registration statement on
Form S-8 (or any equivalent successor form under the Securities Act) to register
the Common Stock issuable upon exercise of this Warrant.

                                   ARTICLE V

                                   DEFINITIONS

         The following terms, as used in this Warrant, have the following
respective meanings:

         "BUSINESS DAY" means each day in which banking institutions in New York
are not required or authorized by law or executive order to close.

         "CLOSING DATE" means the date hereof.

                                       4
<PAGE>   14
         "COMMON STOCK" shall have the meaning set forth in the first paragraph
of this Warrant.

         "COMMON STOCK DISTRIBUTION" shall have the meaning set forth in Section
3.2.

         "COMMON STOCK REORGANIZATION" shall have the meaning set forth in
Section 3.2.

         "COMPANY" shall have the meaning set forth in the first paragraph of
this Warrant.

         "EMPLOYMENT AGREEMENT" shall have the meaning set forth in the second
paragraph of this Warrant.

         "EXCHANGE ACT" means the Securities Exchange Act of 1934, as amended.

         "EXERCISE PRICE" shall mean $29.275 for each share of Common Stock to
be issued upon exercise of this Warrant, subject to adjustment pursuant to
Article III.

         "EXPIRATION DATE" means the third day following the date on which the
Holder ceases for any reason to be employed by Coromed; provided, however, that
if the Holder's employment with Coromed is terminated by Coromed in a manner
that constitutes "Termination for Cause" (as defined in the Holder's employment
agreement), then "Expiration Date" shall mean the date on which the Holder
ceases for any reason to be employed by Coromed.

         "HOLDER" shall have the meaning set forth in the first paragraph of
this Warrant.

         "MARKET PRICE" means, with respect to Common Stock, the average of the
daily closing prices for the Common Stock on the ten (10) consecutive trading
days before the day in question. The closing price for each day shall be the
last reported sales price regular way or, in case no such reported sale takes
place on such date, the average of the reported closing bid and asked prices
regular way, in either case on the New York Stock Exchange ("NYSE"), or if the
Common Stock is not listed or admitted to trading on the NYSE, on the principal
securities exchange on which the Common Stock is listed or admitted to trading
or Nasdaq or, if not listed or admitted to trading on any securities exchange or
Nasdaq, the closing sale price of the Common Stock, or in case no reported sale
takes place, the average of the closing bid and asked prices, on any interdealer
quotation system or any comparable system, or if the Common Stock is not so
quoted, the parties hereto agree for the purposes of this Warrant that the
current market price shall be as determined in good faith by the Board of
Directors of the Company.

         "NASDAQ" means The Nasdaq Stock Market.

         "SECURITIES ACT" means the Securities Act of 1933, as amended.

         "WARRANT AGENT" shall have the meaning set forth in Section 2.1.

                                   ARTICLE VI

                                  MISCELLANEOUS

         6.1 EXPIRATION. This Warrant shall expire and be of no further force
and effect on the Expiration Date.


         6.2 NOTICES. Any notice or other communication to be given hereunder
shall be in writing and shall be delivered by recognized courier, telecopy or
certified mail, return receipt requested, and shall be conclusively deemed to
have been received by a party hereto and to be effective on the day on which
delivered or telecopied to such party at its address set forth below (or at such
other address as such 

                                       5
<PAGE>   15

party shall specify to the other parties hereto in writing), or, if sent
by certified mail, on the third business day after the day on which mailed,
addressed to such party at such addresses.

         In the case of a Holder, such notices and communications shall be
addressed to its address as shown on the books maintained by the Warrant Agent,
unless the Holder shall notify the Company and the Warrant Agent that notices
and communications should be sent to a different address, in which case such
notices and communications shall be sent to the address specified by the Holder,
with a copy to: Morgan, Lewis & Bockius LLP, 2000 One Logan Square,
Philadelphia, PA 19103, Attention: John F. Bales, III, Esq., Facsimile No.:
(215) 963-5299. In the case of the Company, such notices and communications
shall be addressed as follows (until notice of a change is given as provided
herein): Omnicare, Inc., 2800 Chemed Center, 255 East Fifth Street, Cincinnati,
Ohio 45202, Attention: Joel F. Gemunder, Facsimile No.: 513-762-6905, with a
copy to: Dewey Ballantine LLP, 1301 Avenue of the Americas, New York, NY 10019,
Attention: Morton A. Pierce, Esq., Facsimile No.: 212-259-6333.

         6.3 WAIVERS; AMENDMENTS. No failure or delay of the Holder in
exercising any power or right hereunder shall operate as a waiver thereof, nor
shall any single or partial exercise of such right or power, or any abandonment
or discontinuance of steps to enforce such a right or power, preclude any other
or further exercise thereof or the exercise of any other right or power. The
provisions of this Warrant may be amended, modified or waived with (and only
with) the written consent of the Company and the Holder.

         6.4 GOVERNING LAW This Warrant shall be construed in accordance with
and governed by the laws of the State of Delaware without regard to choice of
law principles.

         6.5 SURVIVAL OF AGREEMENTS. All covenants and agreements made by the
parties herein shall be considered to have been relied upon by each party and
shall survive the issuance and delivery of the Warrant, and shall continue in
full force and effect so long as this Warrant is outstanding.

         6.6 COVENANTS TO BIND SUCCESSOR AND ASSIGNS. All covenants,
stipulations, promises and agreements in this Warrant contained by or on behalf
of the Company shall bind its successors and assigns, whether so expressed or
not.

         6.7 SEVERABILITY. In case any one or more of the provisions contained
in this Warrant shall be invalid, illegal or unenforceable in any respect, the
validity, legality and enforceability of the remaining provisions contained
herein and therein shall not in any way be affected or impaired thereby. The
parties shall endeavor in good faith negotiations to replace the invalid,
illegal or unenforceable provisions with valid provisions the economic effect of
which comes as close as possible to that of the invalid, illegal or
unenforceable provisions. 

         6.8 SECTION HEADINGS. The section headings used herein are for
convenience of reference only, are not part of this Warrant and are not to
affect the construction of or be taken into consideration in interpreting this
Warrant.

         6.9 NO RIGHTS AS STOCKHOLDER. This Warrant shall not entitle any Holder
to any rights as a stockholder of the Company and no dividends shall be payable
or accrue in respect of this Warrant or the interest represented hereby or the
shares of Common Stock underlying this Warrant exercisable hereunder unless and
until and only to the extent this Warrant shall be exercised. 

         6.10 NO REQUIREMENT TO EXERCISE. Nothing contained in this Warrant
shall be construed as requiring the Holder to exercise this Warrant.

                                       6
<PAGE>   16


 

         IN WITNESS WHEREOF, Omnicare, Inc. has caused this Warrant to be
executed in its corporate name by one of its officers thereunto duly authorized.

                                 OMNICARE, INC.

                                 By: /s/ Cheryl D. Hodges
                                    ------------------------------------------
                                    Name: Cheryl D. Hodges
                                    Title: Senior Vice President and Secretary





                                       7
<PAGE>   17



 

                               SUBSCRIPTION NOTICE

                    (To be executed upon exercise of Warrant)

To:  OMNICARE, INC.

         The undersigned hereby irrevocably elects to exercise the right of
purchase represented by the attached Warrant for, and to purchase thereunder,
____________ shares of Common Stock, as provided for therein, and tenders
herewith payment of the Exercise Price in full in the form of certified or bank
cashier's check or wire transfer.

         Please issue a certificate or certificates for such shares of Common
Stock in the following name or names and denominations:






         If said number of shares shall not be all the shares issuable upon
exercise of the attached Warrant, a new Warrant is to be issued in the name of
the undersigned for the balance remaining of such shares less any fraction of a
share paid in cash.

Dated:


                           ___________________________________________________
                           NOTE:    The above signature should correspond
                                    exactly with the name on the face of the
                                    attached Warrant.




                                       8

<PAGE>   1

                                                                    EXHIBIT 10.2

                              EMPLOYMENT AGREEMENT

         THIS EMPLOYMENT AGREEMENT (this "Agreement") is made this 29th day of
December, 1997, by and between Alice G. Stasky ("Executive") and COROMED, Inc.,
a Delaware corporation (the "Company");

         WHEREAS, pursuant to the Amended and Restated Agreement and Plan of
Merger, dated as of August 19, 1997, as amended as of November 4, 1997 (the
"Merger Agreement"), among Omnicare, Inc., a Delaware corporation ("Omnicare"),
Coromed Acquisition Corporation, a Delaware corporation and a wholly-owned
subsidiary of Omnicare ("Merger Sub"), the Company and certain stockholders of
the Company, Merger Sub will be merged with and into the Company with the
Company surviving the merger as a wholly-owned subsidiary of Omnicare;

         WHEREAS, the Company previously employed the Executive as Executive
Vice President and Chief Operations Officer;

         WHEREAS, the Company is a contract research organization ("CRO")
providing contract research services to third parties of the type identified
below and desires to continue to employ Executive as its Executive Vice
President and Chief Operations Officer for the purpose of engaging in its
business of researching, developing and testing of pharmaceuticals,
therapeutics, medical devices and diagnostics, the development and management of
study designs, systems and procedures, data management, clinical and statistical
analysis, biochemical analyses, chemical synthesis, validation, evaluation,
support services, regulatory submissions and marketing and post-marketing
support in relation to any such products (the "Business"), and Executive desires
to be employed by the Company for such purpose; and

         WHEREAS, the Executive shall have access to confidential financial
information, trade secrets and other confidential and proprietary information of
the Company and Omnicare and its subsidiaries.

         NOW, THEREFORE, in consideration of these recitals and the mutual
covenants and agreements hereinafter set forth, and other good and valuable
consideration, the receipt and sufficiency of which are hereby acknowledged, the
parties hereto agree as follows:

                                       
<PAGE>   2

SECTION 1: EMPLOYMENT

         1.1 DUTIES. The Company shall employ Executive as Executive Vice
President and Chief Operations Officer of the Company upon the terms and
conditions set forth in this Agreement. Executive shall have such duties as are
customary for such office and which may be assigned to Executive from time to
time by the Company. The principal place of the business of the Executive during
the term of the Agreement shall be in the greater Albany, New York area.

         1.2 BEST EFFORTS. Executive agrees to devote her best efforts and her
full time and attention to the performance of her duties under this Agreement,
and to perform such duties in a trustworthy and businesslike manner. In
addition, Executive agrees that she shall not, directly or indirectly, engage or
participate in, or become employed by or render advisory or consulting services
or other services in connection with, any business activity other than that of
the Company, whether or not such business activity is pursued for gain, profit
or other advantage, without the prior consent of the Company. In addition to the
performance of her duties for the Company, Executive agrees to perform such
additional services for the Company as the board of directors of the Company
reasonably may request and which are consistent with her position as Executive
Vice President and Chief Operations Officer of the Company. 

         1.3 DUTY TO ACT IN THE BEST INTEREST OF THE COMPANY. Executive shall
not act in any manner, directly or indirectly, which may damage the business of
the Company or its affiliates or which would adversely affect the goodwill,
reputation or business relations of the Company or its affiliates with their
customers, the public generally or with any of their other employees. 

SECTION 2: TERM OF EMPLOYMENT

         2.1 TERM. The term of Executive's employment with the Company shall
commence as of the Effective Time, as defined in the Merger Agreement, and shall
continue for a period of five (5) years from the Effective Time (the "Initial
Term"). Commencing not less than one month before the end of the Initial Term or
any additional term, if either party so desires, the Company and the Executive
shall negotiate in good faith to renew this Agreement for a one-year period on
terms and conditions set forth in the Agreement. This Agreement and Executive's
employment also may be terminated as provided for in Sections 2.2, 2.3 or 2.4 of
this Agreement.

         2.2 TERMINATION FOR CAUSE. The Company shall have the right to
terminate Executive's employment hereunder for the following causes (a
"Termination for Cause"): 

         (a)      Conviction of Executive for, or entry of a plea of guilty or
                  nolo contendere by Executive with respect to, any felony or
                  any crime involving an act of moral turpitude;

         (b)      Commission by Executive of any act of fraud toward the Company
                  or any of its affiliates; 

         (c)      Conduct which is materially detrimental to the reputation,
                  goodwill or business operations of the Company or its
                  affiliates;

         (d)      Neglect by Executive of her duties or breach by Executive of
                  her duties or intentional misconduct by Executive in
                  discharging such duties, in each case which is material in the
                  context of her employment relationship with the Company;

                                       2
<PAGE>   3


         (e)      Executive's continued absence from her duties without the
                  consent of the board of directors of the Company after receipt
                  of notification from the board referring to this clause, other
                  than absence due to bona fide illness or disability, as
                  defined herein;

         (f)      Executive's failure or refusal to comply with the directions
                  of the board of directors of the Company or with the policies,
                  standards and regulations of the Company or its affiliates,
                  provided that such directions, policies, standards or
                  regulations do not require Executive (i) to take any action
                  which is illegal, immoral or unethical or (ii) to fail to take
                  any action required by applicable law, regulations or
                  licensing standards, in each case where such failure or
                  refusal to comply continues after receipt of the notification
                  from the board of directors referring to this clause; or 

         (g)      Executive's breach of the restrictive covenants set forth in
                  Section 5 of this Agreement, in such case where such breach
                  continues after a five (5) day period immediately following
                  receipt of notification from the board of directors of the
                  Company referring to this clause.

Upon the effectiveness of any Termination for Cause by the Company, payment of
all compensation to Executive under this Agreement shall cease immediately
(except for any payment of compensation accrued but unpaid through the date of
such Termination for Cause).

         2.3 TERMINATION BY THE COMPANY WITHOUT CAUSE. The Company shall have
the right to terminate this Agreement and Executive's employment without cause
upon ten (10) days' prior written notice to Executive. If the Company terminates
this Agreement and Executive's employment without cause pursuant to this Section
2.3, Executive shall receive her Base Compensation, as that term is defined in
Section 3.1 of this Agreement, for the remainder of the then current term of
this Agreement. Upon such termination, Executive shall not receive any further
compensation pursuant to Sections 3.2 or 3.3 of this Agreement, except as
required by law. In the event of termination without cause, Executive
acknowledges that the Company shall have no liability to her whatsoever other
than its obligation to pay her Base Compensation for the remainder of the then
current term of this Agreement pursuant to Section 3.1.

         2.4 TERMINATION DUE TO DISABILITY OR DEATH. If Executive is unable to
perform her duties under this Agreement by reason of physical or mental
disability, this Agreement shall terminate, and, upon such termination,
Executive shall continue to receive the compensation described in Section 3 of
this Agreement, reduced by any disability payment received under a Company plan
or policy to which Executive may be entitled in lieu of such compensation, for a
period of six (6) months following termination. At the expiration of the six (6)
month period, payment of all compensation to Executive under this Agreement
shall cease immediately (except for any payment of compensation accrued but
unpaid through that date). The term "disability" as used herein shall mean a
condition which prohibits Executive from performing her duties substantially in
the manner she is capable of performing them on the date of this Agreement,
which cannot be removed by reasonable accommodations on the part of the Company,
for ninety (90) days or more during any one (1) year period.

         If Executive should die during the term of this Agreement, this
Agreement shall terminate and all payments to Executive under this Agreement
shall cease immediately (except for any such payments accrued but unpaid through
the date of death).

                                       3
<PAGE>   4

SECTION 3: COMPENSATION

         3.1 BASE COMPENSATION. Subject to Sections 2 and 5.5 of this Agreement,
during the term of this Agreement, the Company shall pay to Executive an initial
annual salary of $142,663 ("Base Compensation"), such annual salary to be
reviewed for increase, if any, by the Company in accordance with Company
policies but not less frequently than intervals of fourteen (14) months from
July 1, 1997. The Base Compensation shall be paid in conformity with the
Company's policy relating to salaried employees and shall be subject to all
required deductions and withholdings.

         3.2 REIMBURSEMENT OF BUSINESS EXPENSES.  During the term of this
Agreement, the Company shall reimburse Executive for all ordinary and reasonable
business expenses incurred by her in connection with the Business. Reimbursement
of such expenses shall be paid monthly, upon submission by Executive to the
Company of vouchers itemizing such expenses in a form conforming to Company
policy. 

         3.3 BENEFITS. During the term of this Agreement, Executive shall be
entitled to such insurance, medical, savings and investment plans, sick leave,
holiday, education and continuing education assistance and other benefits as may
be given from time to time to other similarly-situated employees of the Company,
as determined from time to time by the Company. Executive shall be entitled to a
number of vacation days in accordance with Company policy. Executive may request
unpaid leave benefits at any time, which benefits may be granted at the sole
discretion of the board of directors of the Company.

SECTION 4: ALL BUSINESS TO BE THE PROPERTY OF THE COMPANY; ASSIGNMENT

         Executive agrees that the Business and all business developed by her
relating to the Business, including, without limitation, software, contracts,
fees, commissions, customer lists and any other incident of any business
developed or sought by the Company or its affiliates, or earned or carried on by
Executive for the Company, are and shall be the exclusive property of the
Company for its sole use.

         Executive hereby grants and assigns to the Company (without additional
compensation) her entire right, title and interest under applicable laws in and
to all software products and modifications thereto, inventions, patents, patent
applications, research, information, customer lists, all other technical and
research data, and copyrighted material made, conceived, developed or acquired
by her solely or jointly with others during the period of her employment by the
Company, but only to the extent the foregoing pertains to the Business.

SECTION 5: COVENANTS OF NONDISCLOSURE, NONSOLICITATION AND NONCOMPETITION

         5.1 NONDISCLOSURE. During the term of her employment with the Company
and for five (5) years after the termination of her employment with the Company
for any reason, Executive shall not, and Executive shall use her best efforts
(which best efforts shall include, without limitation, notifying the board of
directors of the Company of any suspected breach of this Section 5.1) to ensure
that any persons or entities over which Executive has control do not, directly
or indirectly, use any proprietary and confidential information of the Company
or its affiliates for any purpose not associated with activities of the Company
or its affiliates, or disseminate or disclose any such information to any person
or entity not affiliated or associated with the Company. Such proprietary and
confidential information includes, without limitation, sales methods,
prospecting methods, customer lists, computer technology, programs and data,
whether on-line or off-loaded on disk format, methods of presentation and any
other plans, programs and materials used in managing, marketing or furthering
the business of the Company and its affiliates. Upon termination of Executive's
employment relationship with the Company, Executive shall return to the Company
all documents, records, notebooks, manuals, computer disks and similar
repositories of or containing the proprietary and confidential information of
the Company or its affiliates, including all copies thereof, then in Executive's
possession or control, whether prepared by Executive or


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<PAGE>   5

otherwise. Executive shall undertake all reasonably necessary and appropriate
steps to insure that the confidentiality of proprietary and confidential
information of the Company and its affiliates shall be maintained.

         5.2 NONSOLICITATION. For a period of five (5) years after the
termination of Executive's employment with the Company for any reason, Executive
shall not (i) solicit, service or in any way or to any degree handle (other than
as are permitted in Section 5.3) any business similar to that performed by
Executive for the Company or its affiliates, for any person, firm or entity
which is a customer or actively marketed prospect of the Company or such
affiliates for which the Executive has performed services or which becomes a
customer or actively marketed prospect of the Company or such affiliates during
the term of Executive's employment, whether or not a customer or prospect of the
Company shall have been handled, serviced or produced by Executive, (ii) divert
or attempt to divert any such customer or prospect or (iii) announce or
advertise to the general public her former employment by or connections with the
Company or its affiliates. For purposes of this Section 5.2, the term customer
shall not include any entity which has not conducted business with the Company
or any such affiliate during the three-year period immediately preceding the
Executive's termination of employment.

         For a period of five (5) years after the termination of Executive's
employment with the Company for any reason, Executive shall not solicit, take
away, hire, employ or endeavor to employ any of the employees of the Company or
any of its affiliates for which the Executive has performed services.

         5.3 NONCOMPETITION. Executive acknowledges that the Business was
conducted prior to the date of this Agreement by the Company throughout North
America, South America and Europe (the "Restricted Area") and, therefore, agrees
that, during the term of her employment with the Company and for five (5) years
after the termination of her employment with the Company for any reason, she
shall not, without the prior written consent of the Company, directly or
indirectly, own, develop, manage, operate, join, control or participate in the
ownership, management, operation or control of, or become an employee or
independent contractor of, or consultant to, any business which competes with
the Business as conducted by the Company or any of its subsidiary companies, or
any of its successors in the past, during the term of Executive's employment
hereunder, for the duration of Executive's agreement not to compete pursuant to
this Section 5.3., by selling such products, or providing such services, as the
Company, or any of its subsidiary companies, or any of its successors, sells or
provides. This restriction will apply within the Restricted Area. The foregoing
notwithstanding, nothing herein shall be construed so as to prohibit or restrict
Executive from (i) activities of the type described above where the business is
not a CRO (or is not then contemplated to be a CRO) but is a manufacturer of
pharmaceuticals, therapeutics or diagnostics provided that such manufacturer is
not a customer for which the Business has provided services within the one-year
period preceding the Executive's employment with the manufacturer, or (ii)
owning less than five percent (5%) of the outstanding common stock of any
corporation, the stock of which is publicly traded on a national securities
exchange or in the over-the-counter market, that competes with the Company.
Executive further agrees that, during her employment with the Company, she shall
use her best efforts to preserve the Business and the organization of the
Company, to keep available to the Company the services of its employees, and to
preserve for the Company its and her favorable business relationships with
suppliers, customers and others with whom the Company and Executive have
business relationships.

         5.4 APPLICABILITY. The provisions of Sections 5.1, 5.2 and 5.3 of this
Agreement shall apply to all terminations of Executive's employment with the
Company, regardless of the cause or circumstances thereof and whether such
termination was voluntary or involuntary, for cause or without cause, provided
the Company complies in all material respects with Section 2.3. Further,
Executive's covenants of nondisclosure, noncompetition and nonsolicitation,
along with the Company's remedies for the breach or threatened breach of those
covenants, shall remain in effect following the termination of this Agreement
and Executive's employment, regardless of the cause or circumstances thereof and
whether such termination was voluntary or involuntary, for cause or without
cause, provided the Company in all respects complies with Section 2.3. 


                                       5
<PAGE>   6

         5.5 REMEDIES. In view of the services which Executive will perform for
the Company, which are special, unique, extraordinary and intellectual in
character, which place her in a position of confidence and trust with the
customers and employees of the Company and its affiliates, and which provide her
with access to confidential financial information, trade secrets, "know-how" and
other confidential and proprietary information of the Company and its
affiliates, in view of the geographic scope and nature of the business in which
the Company and its affiliates are engaged, and recognizing the value of this
Agreement to her, Executive expressly acknowledges that the restrictive
covenants set forth in this Agreement, including, without limitation, the
geographic scope of such covenants, are necessary in order to protect and
maintain the proprietary interests and other legitimate business interests of
the Company and its affiliates, and that the enforcement of such restrictive
covenants shall not prevent her from earning a livelihood. Executive also
acknowledges that the scope of the operations of the Company and its affiliates
are such that it is reasonable that the restrictions set forth in this Agreement
are not more limited as to geographic area than is set forth herein. Executive
further acknowledges that the remedy at law for any breach or threatened breach
of this Agreement will be inadequate and, accordingly, that the Company, in
addition to all other available remedies (including, without limitation, seeking
such damages as they have sustained by reason of such breach), shall be entitled
to injunctive or any other appropriate form of equitable relief. Notwithstanding
anything in this Agreement to the contrary, in the event Executive breaches any
of the covenants of nondisclosure, nonsolicitation or noncompetition set forth
in Sections 5.1, 5.2 and 5.3 of this Agreement, she shall not receive any
further payments from the Company pursuant to this Agreement. The Company shall
be entitled to seek a restraining order or injunction in any court of competent
jurisdiction to prevent any continuation of any violation of the provisions of
this Section 5 and the Executive hereby consents that such restraining order or
injunction may be granted without the necessity of the posting of any bond by
the Company. 

SECTION 6: WARRANTS

         Upon commencement of and as compensation, in part, for Executive's
employment pursuant to this Agreement, Executive shall be granted warrants to
purchase 60,000 shares of the common stock, par value $1.00 per share, of
Omnicare (the "Omnicare Common Stock"). The warrants shall be substantially in
the form attached hereto as Exhibit A. The Executive shall comply with the terms
of the warrants.

SECTION 7:  MISCELLANEOUS PROVISIONS

         7.1 ASSIGNMENT AND SUCCESSORS. If the Company sells all or
substantially all of the assets of the Business, the rights and obligations of
the Company under this Agreement may be assigned without Executive's consent. In
all other circumstances, the rights and obligations of the Company under this
Agreement may be assigned with Executive's consent (which shall not be
unreasonably withheld) and shall inure to the benefit of and be binding upon the
successors and assigns of the Company. Executive's obligation to provide
services hereunder may not be assigned to or assumed by any other person or
entity, except as provided above.

         7.2 NOTICES. All notices, requests, demands, or other communications
under this Agreement shall be in writing and shall be delivered by hand or
mailed, by fax (receipt confirmed), by express mail services or by registered or
certified mail, postage prepaid, to the Company c/o Omnicare, Inc., 2800 Chemed
Center, 255 East Fifth Street, Cincinnati, Ohio 45202, and to Executive at her
address as shown in the Company's records. Notices, requests, demands, and other
communications so delivered shall be deemed given upon receipt. 

         7.3 SEVERABILITY. If any provision or portion of this Agreement shall
be or become illegal, invalid or unenforceable in whole or in part for any
reason, such provision shall be ineffective only to the extent of such
illegality, invalidity or unenforceability, without invalidating the remainder
of such provision or the remaining provisions of this Agreement. If any court of
competent jurisdiction should deem any covenant herein to be invalid, illegal or
unenforceable because its scope is considered excessive, 

                                       6
<PAGE>   7

such covenant shall be modified so that the scope of the covenant is reduced
only to the minimum extent necessary to render the modified covenant valid,
legal and enforceable.

         7.4 INTEGRATION, AMENDMENT AND WAIVER. This Agreement constitutes the
entire agreement among the parties hereto, superseding all prior arrangements
and agreements, and may be modified, amended or waived only by a written
instrument signed by the parties hereto.

         7.5 GOVERNING LAW. This Agreement shall be construed in accordance with
and governed for all purposes by the laws of the State of Ohio applicable to
contracts executed and wholly-performed within such State.

         7.6 INTERPRETATION. The headings contained in this Agreement are for
reference purposes only, and shall not affect in any way the meaning or
interpretation of this Agreement. The language in all parts of this Agreement
shall in all cases be construed according to its fair meaning, and not strictly
for or against any party hereto. In this Agreement, unless the context otherwise
requires, the singular and the plural include one another.

         7.7 NON-WAIVER OF RIGHTS AND BREACHES. No failure or delay of any party
herein in the exercise of any right given to such party hereunder shall
constitute a waiver thereof unless the time specified herein for the exercise of
such right has expired, nor shall any single or partial exercise of any right
preclude other or further exercise thereof or of any other right. The waiver by
a party hereto of any default of any other party shall not be deemed to be a
waiver of any subsequent default or other default by such party. 

         7.8 DISPUTE RESOLUTION.

                  (a)      (i) Any dispute, controversy or claim arising out of
                           or relating to this Agreement or any term or
                           provision of this Agreement, including, without
                           limitation, any claim of breach, termination or
                           invalidity thereof, (ii) any matter subject to
                           arbitration under any provision of this Agreement and
                           (iii) any other matter which the parties agree to
                           submit to arbitration shall be settled by arbitration
                           in accordance with the Commercial Arbitration Rules
                           of the American Arbitration Association, and judgment
                           on the award rendered by the arbitrator(s) may be
                           entered in any court having jurisdiction thereof.
                           Such arbitration proceedings shall be held in the
                           State of Ohio.

                  (b)      Notwithstanding the foregoing, the Company at all
                           times shall have the right to bring an action to
                           enforce the covenants and seek the remedies set forth
                           in Section 5 of this Agreement (other than an action
                           for monetary damages which is covered by the dispute
                           resolution provisions of Section 7.8(a) provided that
                           any arbitration proceedings for monetary damages
                           sought in connection with an injunction or other
                           equitable relief shall be under the supervision of
                           the court in which such relief is sought) through the
                           courts as they deem necessary or desirable in order
                           to protect their confidential or proprietary
                           information or to prevent the occurrence of any event
                           which the Company believes will cause them to suffer
                           immediate and irreparable harm or damage. The parties
                           agree that any such action may be brought in a state
                           or federal court located within Cincinnati, Ohio. The
                           parties waive any and all objections to jurisdiction
                           or venue. The parties further agree that service of
                           process may be made by registered mail to the address
                           referred to in Section 7.2 of this Agreement, and
                           that such service shall be deemed effective service
                           of process.

                                       7
<PAGE>   8

         7.9 COUNTERPARTS. This Agreement may be executed in any number of
counterparts by the parties hereto, each of which when so executed shall be
deemed an original and all of which taken together shall constitute one and the
same instrument.







                                       8
<PAGE>   9


                              

         IN WITNESS WHEREOF, the parties hereto have executed this Agreement as
of the date first written above.

                                  COROMED, INC.

                                  By: /s/ Dale B. Evans
                                     ------------------------------
                                     Name: Dale B. Evans
                                     Title: President and CEO


                                  Executive: Alice G. Stasky


                                  By: /s/ Alice G. Stasky
                                     ------------------------------

                                     S.S. No. ###-##-####
                                              ---------------------


                                       9
<PAGE>   10




                                        

THIS WARRANT AND THE SECURITIES TO BE ISSUED UPON EXERCISE HEREOF HAVE NOT BEEN
REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT"),
OR THE SECURITIES LAWS OF ANY STATE. THIS WARRANT MAY NOT BE OFFERED, SOLD,
TRANSFERRED, PLEDGED OR HYPOTHECATED. THE SECURITIES ISSUABLE UPON EXERCISE
HEREOF MAY NOT BE OFFERED, SOLD, TRANSFERRED, PLEDGED, HYPOTHECATED OR OTHERWISE
DISPOSED OF EXCEPT PURSUANT TO (i) AN EFFECTIVE REGISTRATION STATEMENT UNDER THE
SECURITIES ACT AND ANY APPLICABLE STATE SECURITIES LAWS, (ii) TO THE EXTENT
APPLICABLE, RULE 144 UNDER THE SECURITIES ACT (OR ANY SIMILAR RULE UNDER THE
SECURITIES ACT RELATING TO THE DISPOSITION OF SECURITIES) OR (iii) AN OPINION OF
COUNSEL, IF SUCH OPINION SHALL BE REASONABLY SATISFACTORY TO COUNSEL TO THE
ISSUER, THAT AN EXEMPTION FROM REGISTRATION UNDER THE SECURITIES ACT AND
APPLICABLE STATE LAW IS AVAILABLE.

                                    Dated: December 29, 1997
                                    No: ____

                                     WARRANT

To Purchase up to an aggregate of 60,000 shares of Common Stock, $1.00 par value
("Common Stock"), of

                                 OMNICARE, INC.

         THIS IS TO CERTIFY THAT, for value received, Alice G. Stasky
(hereinafter referred to as the "Holder"), is entitled to purchase from
Omnicare, Inc., a Delaware Corporation (the "Company"), at any time and from
time to time during the period from the date hereof to and including the
Expiration Date, at the offices of the Warrant Agent (as hereinafter defined),
at the Exercise Price (as hereinafter defined), up to an aggregate of 60,000
shares of Common Stock, subject to adjustment and upon the terms and conditions
as hereinafter provided, and is also entitled to exercise the other appurtenant
rights, powers and privileges hereinafter described.

         This Warrant is being issued in connection with that certain Employment
Agreement between Coromed, Inc., a Delaware corporation and a wholly owned
subsidiary of the Company ("Coromed"), and the Holder, dated as of the date
hereof (the "Employment Agreement").

         Certain terms used in this Warrant are defined in Article V.

                                   ARTICLE I

                               EXERCISE OF WARRANT

         1.1 METHOD OF EXERCISE. To exercise this Warrant in whole or in part,
the Holder shall deliver to the Company, at the Warrant Agent, (a) this Warrant,
(b) a written notice, in substantially the form of the Subscription Notice
attached hereto as Exhibit A, of such Holder's election to exercise this
Warrant, which notice shall specify the number of shares of Common Stock to be
purchased (in lots of not less than 1,000 shares), the denominations of the
share certificate or certificates desired and the name or names in which such
certificates are to be registered and (c) payment of the Exercise Price with
respect to such shares. Such payment may be made, at the option of the Holder,
by cash, certified or bank cashier's check or wire transfer.

         In addition to and at the time of payment of the Exercise Price, the
Holder shall pay to the Company the full amount of all federal and state
withholding and other employment taxes applicable to the taxable income of such
Holder resulting from such exercise.

                                      
<PAGE>   11

         The Company shall as promptly as practicable and in any event within
five (5) Business Days after receipt of the Subscription Notice, execute and
deliver or cause to be executed and delivered, in accordance with such notice, a
certificate or certificates representing the aggregate number of shares of
Common Stock to which the Holder is entitled. The share certificate or
certificates so delivered shall be in such denominations as may be specified in
such notice or, if such notice shall not specify denominations, in denominations
of 1,000 shares each, and shall be issued in the name of the Holder or such
other name or names as shall be designated in such notice. Such certificate or
certificates shall be deemed to have been issued, and the Holder or any other
person so designated to be named therein shall be deemed for all purposes to
have become holders of record of such shares, as of the date the aforementioned
notice is received by the Company. If this Warrant shall have been exercised
only in part, the Company shall, at the time of delivery of the certificate or
certificates, deliver to the Holder a new Warrant evidencing the rights to
purchase the remaining shares of Common Stock called for by this Warrant, which
new Warrant shall in all other respects be identical with this Warrant, or, at
the request of the Holder, appropriate notation may be made on this Warrant
which shall then be returned to the Holder. The Company shall pay all expenses,
taxes and other charges payable in connection with the preparation, issuance and
delivery of share certificates and new Warrants, except that, if share
certificates shall be registered in a name or names other than the name of the
Holder, funds sufficient to pay all transfer taxes payable as a result of such
transfer shall be paid by the Holder at the time of delivering the
aforementioned notice of exercise or promptly upon receipt of a written request
of the Company for payment.

         1.2 SHARES TO BE FULLY PAID AND NONASSESSABLE; RESERVATION AND LISTING.
All shares of Common Stock issued upon the exercise of this Warrant shall be
validly issued, fully paid and nonassessable and the Company shall at all times
reserve and keep available out of its authorized shares of Common Stock, solely
for the purpose of issuance upon the exercise of this Warrant, such number of
shares of Common Stock as shall be exercisable hereof. If the Common Stock of
any class is then listed on any national securities exchange (as such term is
used in the Exchange Act (as defined herein)) or quoted on Nasdaq, the Company
shall cause the shares of Common Stock issuable upon exercise of this Warrant to
be duly listed or quoted thereon, as the case may be.

         1.3 NO FRACTIONAL SHARES TO BE ISSUED. The Company shall not be
required to issue fractions of shares of Common Stock upon exercise of this
Warrant. If any fraction of a share would, but for this Section, be issuable
upon any exercise of this Warrant, in lieu of such fractional share the Company
shall pay to the Holder in cash, an amount equal to the same fraction of the
current Market Price per share of outstanding Common Stock on the Business Day
immediately prior to the date of such exercise. 

         1.4 SHARE LEGEND. Each certificate for shares of Common Stock issued
upon exercise of this Warrant, unless at the time of exercise such shares are
registered under the Securities Act, shall bear the following legend:

                  THIS SECURITY HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT
         OF 1933, AS AMENDED (THE "SECURITIES ACT"), OR THE SECURITIES LAWS OF
         ANY STATE AND MAY NOT BE OFFERED, SOLD, TRANSFERRED, PLEDGED,
         HYPOTHECATED EXCEPT PURSUANT TO (i) AN EFFECTIVE REGISTRATION STATEMENT
         UNDER THE SECURITIES ACT AND ANY APPLICABLE STATE SECURITIES LAWS, (ii)
         TO THE EXTENT APPLICABLE, RULE 144 UNDER THE SECURITIES ACT (OR ANY
         SIMILAR RULE UNDER THE SECURITIES ACT RELATING TO THE DISPOSITION OF
         SECURITIES), OR (iii) AN OPINION OF COUNSEL, IF SUCH OPINION SHALL BE
         REASONABLY SATISFACTORY TO COUNSEL TO THE ISSUER, THAT AN EXEMPTION
         FROM REGISTRATION UNDER THE SECURITIES ACT AND APPLICABLE STATE LAW IS
         AVAILABLE.

         Any certificate issued at any time in exchange or substitution for any
certificate bearing such legend (except a new certificate issued upon completion
of a public distribution pursuant to a registration statement under the
Securities Act) shall also bear such legend unless, in the opinion of

                                       2
<PAGE>   12

counsel selected by the holder of such certificate and reasonably acceptable to
counsel to the Company, the securities represented thereby need no longer be
subject to restrictions on resale under the Securities Act or any state
securities laws.

                                   ARTICLE II

                        WARRANT AGENT; TRANSFER, EXCHANGE
                           AND REPLACEMENT OF WARRANTS

         2.1 WARRANT AGENT. Until such time, if any, as an independent agent
shall be appointed by the Company to perform services with respect to the
Warrant described herein (the "Warrant Agent"), the Company shall perform the
obligations of the Warrant Agent provided herein at its principal office address
or such other address in the United States as the Company shall specify by prior
written notice to the Holder.

         2.2 OWNERSHIP OF WARRANT. The Company shall treat the Holder as the
holder and owner hereof for all purposes (and shall not be affected by any
notice to the contrary which shall not be effective). 

         2.3 NO TRANSFER. The Holder of this Warrant, by its acceptance hereof,
covenants and agrees that such Warrant may not be sold, transferred, pledged or
hypothecated. The Common Stock issuable upon exercise hereof may not be sold,
transferred, pledged, hypothecated or otherwise disposed of unless registered
pursuant to the Securities Act or the Company shall have been supplied with an
opinion of counsel reasonably satisfactory to the Company's counsel that such
transfer is not in violation of the Securities Act and any applicable state
laws.

         2.4 DIVISION OR COMBINATION OF WARRANTS. This Warrant may be divided
(in lots exercisable for not less than 1,000 shares of Common Stock) or combined
with other Warrants upon surrender hereof. The Company shall execute and deliver
a new Warrant or Warrants in exchange for the Warrant or Warrants to be divided
or combined in accordance with such notice.

         2.5 LOSS, THEFT, DESTRUCTION OF WARRANT CERTIFICATES. Upon receipt of
evidence satisfactory to the Company of the loss, theft, destruction or
mutilation of any Warrant and, in the case of any such loss, theft or
destruction, upon receipt of indemnity or security satisfactory to the Company,
or, in the case of any such mutilation, upon surrender and cancellation of such
Warrant, the Company, at Holder's expense, will make and deliver, in lieu of
such lost, stolen, destroyed or mutilated Warrant, a new Warrant of like tenor
and representing the right to purchase the same aggregate number of shares of
Common Stock. 

                                  ARTICLE III

                              ADJUSTMENT PROVISIONS

         3.1 ADJUSTMENTS GENERALLY. The Exercise Price and the number of shares
of Common Stock (or other securities or property) issuable upon exercise of this
Warrant shall be subject to adjustment from time to time upon the occurrence of
certain events, as provided in this Article III.

         3.2 COMMON STOCK REORGANIZATIONS AND DISTRIBUTIONS. If the Company
shall (i) subdivide its outstanding shares of Common Stock into a greater number
of shares or consolidate its outstanding shares of Common Stock into a smaller
number of shares (any such event being called a "Common Stock Reorganization")
or (ii) pay a dividend in shares of Common Stock or make a distribution in
shares of Common Stock on its outstanding shares of Common Stock, other than
pursuant


                                       3
<PAGE>   13

to a Common Stock Reorganization (any such event being herein called a "Common
Stock Distribution"), then (A) the Exercise Price shall be adjusted, effective
immediately after the record date at which the holders of Common Stock are
determined for purposes of such Common Stock Reorganization or Common Stock
Distribution, to a price determined by multiplying the Exercise Price in effect
immediately prior to such record date by a fraction, the numerator of which
shall be the number of shares of Common Stock outstanding on such record date
before giving effect to such Common Stock Reorganization or Common Stock
Distribution and the denominator of which shall be the number of shares of
Common Stock outstanding after giving effect to such Common Stock Reorganization
or Common Stock Distribution, and (B) the number of shares of Common Stock
subject to purchase upon exercise of this Warrant shall be adjusted, effective
at such time, to a number determined by multiplying the number of shares of
Common Stock subject to purchase immediately before such Common Stock
Reorganization or Common Stock Distribution by a fraction, the numerator of
which shall be the number of shares outstanding after giving effect to such
Common Stock Reorganization or Common Stock Distribution and the denominator of
which shall be the number of shares of Common Stock outstanding immediately
before such Common Stock Reorganization or Common Stock Distribution. 

         3.3 ADJUSTMENT RULES.

         (a) Any adjustments pursuant to this Article III shall be made
successively whenever an event referred to herein shall occur.

         (b) No adjustment shall be made pursuant to this Article III in respect
of the issuance from time to time of Common Stock upon the exercise of this
Warrant.

         (c) If the Company shall set a record date to determine the holders of
Common Stock for purposes of a Common Stock Reorganization or Common Stock
Distribution and shall legally abandon such action prior to effecting such
action, then no adjustment shall be made pursuant to this Article III in respect
of such action. 

         3.4 NOTICE OF ADJUSTMENT. As promptly as practicable after any action
is taken which requires an adjustment or readjustment pursuant to this Article
III, the Company shall give notice to the Holder of such event, and, if
determinable, the required adjustment and the computation thereof. If the
required adjustment is not determinable at the time of such notice, the Company
shall give notice to the Holder of such adjustment and computation promptly
after such adjustment becomes determinable.

                                   ARTICLE IV

                              FORM S-8 REGISTRATION

         4.1 FORM S-8 REGISTRATION. As promptly as reasonably practicable after
the Closing Date, the Company will prepare and file a registration statement on
Form S-8 (or any equivalent successor form under the Securities Act) to register
the Common Stock issuable upon exercise of this Warrant.

                                   ARTICLE V

                                   DEFINITIONS

         The following terms, as used in this Warrant, have the following
respective meanings:

         "BUSINESS DAY" means each day in which banking institutions in New York
are not required or authorized by law or executive order to close.

         "CLOSING DATE" means the date hereof.

                                       4
<PAGE>   14

         "COMMON STOCK" shall have the meaning set forth in the first paragraph
of this Warrant.

         "COMMON STOCK DISTRIBUTION" shall have the meaning set forth in Section
3.2.

         "COMMON STOCK REORGANIZATION" shall have the meaning set forth in
Section 3.2.

         "COMPANY" shall have the meaning set forth in the first paragraph of
this Warrant.

         "EMPLOYMENT AGREEMENT" shall have the meaning set forth in the second
paragraph of this Warrant.

         "EXCHANGE ACT" means the Securities Exchange Act of 1934, as amended.

         "EXERCISE PRICE" shall mean $29.275 for each share of Common Stock to
be issued upon exercise of this Warrant, subject to adjustment pursuant to
Article III.

         "EXPIRATION DATE" means the third day following the date on which the
Holder ceases for any reason to be employed by Coromed; provided, however, that
if the Holder's employment with Coromed is terminated by Coromed in a manner
that constitutes "Termination for Cause" (as defined in the Holder's employment
agreement), then "Expiration Date" shall mean the date on which the Holder
ceases for any reason to be employed by Coromed.

         "HOLDER" shall have the meaning set forth in the first paragraph of
this Warrant.

         "MARKET PRICE" means, with respect to Common Stock, the average of the
daily closing prices for the Common Stock on the ten (10) consecutive trading
days before the day in question. The closing price for each day shall be the
last reported sales price regular way or, in case no such reported sale takes
place on such date, the average of the reported closing bid and asked prices
regular way, in either case on the New York Stock Exchange ("NYSE"), or if the
Common Stock is not listed or admitted to trading on the NYSE, on the principal
securities exchange on which the Common Stock is listed or admitted to trading
or Nasdaq or, if not listed or admitted to trading on any securities exchange or
Nasdaq, the closing sale price of the Common Stock, or in case no reported sale
takes place, the average of the closing bid and asked prices, on any interdealer
quotation system or any comparable system, or if the Common Stock is not so
quoted, the parties hereto agree for the purposes of this Warrant that the
current market price shall be as determined in good faith by the Board of
Directors of the Company.

         "NASDAQ" means The Nasdaq Stock Market.

         "SECURITIES ACT" means the Securities Act of 1933, as amended.

         "WARRANT AGENT" shall have the meaning set forth in Section 2.1.

                                   ARTICLE VI

                                  MISCELLANEOUS

         6.1 EXPIRATION. This Warrant shall expire and be of no further force
and effect on the Expiration Date.

         6.2 NOTICES. Any notice or other communication to be given hereunder
shall be in writing and shall be delivered by recognized courier, telecopy or
certified mail, return receipt requested, and shall be conclusively deemed to
have been received by a party hereto and to be effective on the day on which
delivered or telecopied to such party at its address set forth below (or at such
other address as such 




                                       5
<PAGE>   15

party shall specify to the other parties hereto in writing), or, if sent by
certified mail, on the third business day after the day on which mailed,
addressed to such party at such addresses.

         In the case of a Holder, such notices and communications shall be
addressed to its address as shown on the books maintained by the Warrant Agent,
unless the Holder shall notify the Company and the Warrant Agent that notices
and communications should be sent to a different address, in which case such
notices and communications shall be sent to the address specified by the Holder,
with a copy to: Morgan, Lewis & Bockius LLP, 2000 One Logan Square,
Philadelphia, PA 19103, Attention: John F. Bales, III, Esq., Facsimile No.:
(215) 963-5299. In the case of the Company, such notices and communications
shall be addressed as follows (until notice of a change is given as provided
herein): Omnicare, Inc., 2800 Chemed Center, 255 East Fifth Street, Cincinnati,
Ohio 45202, Attention: Joel F. Gemunder, Facsimile No.: 513-762-6905, with a
copy to: Dewey Ballantine LLP, 1301 Avenue of the Americas, New York, NY 10019,
Attention: Morton A. Pierce, Esq., Facsimile No.: 212-259-6333.

         6.3 WAIVERS; AMENDMENTS. No failure or delay of the Holder in
exercising any power or right hereunder shall operate as a waiver thereof, nor
shall any single or partial exercise of such right or power, or any abandonment
or discontinuance of steps to enforce such a right or power, preclude any other
or further exercise thereof or the exercise of any other right or power. The
provisions of this Warrant may be amended, modified or waived with (and only
with) the written consent of the Company and the Holder.

         6.4 GOVERNING LAW This Warrant shall be construed in accordance with
and governed by the laws of the State of Delaware without regard to choice of
law principles.

         6.5 SURVIVAL OF AGREEMENTS. All covenants and agreements made by the
parties herein shall be considered to have been relied upon by each party and
shall survive the issuance and delivery of the Warrant, and shall continue in
full force and effect so long as this Warrant is outstanding. 

         6.6 COVENANTS TO BIND SUCCESSOR AND ASSIGNS. All covenants,
stipulations, promises and agreements in this Warrant contained by or on behalf
of the Company shall bind its successors and assigns, whether so expressed or
not.

         6.7 SEVERABILITY. In case any one or more of the provisions contained
in this Warrant shall be invalid, illegal or unenforceable in any respect, the
validity, legality and enforceability of the remaining provisions contained
herein and therein shall not in any way be affected or impaired thereby. The
parties shall endeavor in good faith negotiations to replace the invalid,
illegal or unenforceable provisions with valid provisions the economic effect of
which comes as close as possible to that of the invalid, illegal or
unenforceable provisions. 

         6.8 SECTION HEADINGS. The section headings used herein are for
convenience of reference only, are not part of this Warrant and are not to
affect the construction of or be taken into consideration in interpreting this
Warrant.

         6.9 NO RIGHTS AS STOCKHOLDER. This Warrant shall not entitle any Holder
to any rights as a stockholder of the Company and no dividends shall be payable
or accrue in respect of this Warrant or the interest represented hereby or the
shares of Common Stock underlying this Warrant exercisable hereunder unless and
until and only to the extent this Warrant shall be exercised.

         6.10 NO REQUIREMENT TO EXERCISE. Nothing contained in this Warrant
shall be construed as requiring the Holder to exercise this Warrant.

                                       6
<PAGE>   16


 

         IN WITNESS WHEREOF, Omnicare, Inc. has caused this Warrant to be
executed in its corporate name by one of its officers thereunto duly authorized.

                                 OMNICARE, INC.

                                 By: /s/ Cheryl D. Hodges
                                    ---------------------------------
                                    Name: Cheryl D. Hodges
                                    Title: Senior Vice President and
                                          Secretary






                                       7
<PAGE>   17


                               SUBSCRIPTION NOTICE

                    (To be executed upon exercise of Warrant)

To:  OMNICARE, INC.

         The undersigned hereby irrevocably elects to exercise the right of
purchase represented by the attached Warrant for, and to purchase thereunder,
____________ shares of Common Stock, as provided for therein, and tenders
herewith payment of the Exercise Price in full in the form of certified or bank
cashier's check or wire transfer.

         Please issue a certificate or certificates for such shares of Common
Stock in the following name or names and denominations:




         If said number of shares shall not be all the shares issuable upon
exercise of the attached Warrant, a new Warrant is to be issued in the name of
the undersigned for the balance remaining of such shares less any fraction of a
share paid in cash.

Dated:
                                    ___________________________________________
                                    NOTE:    The above signature should
                                             correspond exactly with the name on
                                             the face of the attached Warrant.





                                       8

<PAGE>   1

                                                                    EXHIBIT 10.3

                              EMPLOYMENT AGREEMENT

         THIS EMPLOYMENT AGREEMENT (this "Agreement") is made this 29th day of
December, 1997, by and between Thomas J. Massey ("Executive") and COROMED, Inc.,
a Delaware corporation (the "Company");

         WHEREAS, pursuant to the Amended and Restated Agreement and Plan of
Merger, dated as of August 19, 1997, as amended as of November 4, 1997 (the
"Merger Agreement"), among Omnicare, Inc., a Delaware corporation ("Omnicare"),
Coromed Acquisition Corporation, a Delaware corporation and a wholly-owned
subsidiary of Omnicare ("Merger Sub"), the Company and certain stockholders of
the Company, Merger Sub will be merged with and into the Company with the
Company surviving the merger as a wholly-owned subsidiary of Omnicare;

         WHEREAS, the Company previously employed the Executive as Senior Vice
President, Drug Development;

         WHEREAS, the Company is a contract research organization ("CRO")
providing contract research services to third parties of the type identified
below and desires to continue to employ Executive as its Senior Vice President,
Drug Development for the purpose of engaging in its business of researching,
developing and testing of pharmaceuticals, therapeutics, medical devices and
diagnostics, the development and management of study designs, systems and
procedures, data management, clinical and statistical analysis, biochemical
analyses, chemical synthesis, validation, evaluation, support services,
regulatory submissions and marketing and post-marketing support in relation to
any such products (the "Business"), and Executive desires to be employed by the
Company for such purpose; and

         WHEREAS, the Executive shall have access to confidential financial
information, trade secrets and other confidential and proprietary information of
the Company and Omnicare and its subsidiaries.

         NOW, THEREFORE, in consideration of these recitals and the mutual
covenants and agreements hereinafter set forth, and other good and valuable
consideration, the receipt and sufficiency of which are hereby acknowledged, the
parties hereto agree as follows:

                                       
<PAGE>   2

SECTION 1:  EMPLOYMENT

         1.1 DUTIES. The Company shall employ Executive as Senior Vice
President, Drug Development of the Company upon the terms and conditions set
forth in this Agreement. Executive shall have such duties as are customary for
such office and which may be assigned to Executive from time to time by the
Company. The principal place of the business of the Executive during the term of
the Agreement shall be in the greater Albany, New York area.

         1.2 BEST EFFORTS. Executive agrees to devote his best efforts and his
full time and attention to the performance of his duties under this Agreement,
and to perform such duties in a trustworthy and businesslike manner. In
addition, Executive agrees that he shall not, directly or indirectly, engage or
participate in, or become employed by or render advisory or consulting services
or other services in connection with, any business activity other than that of
the Company, whether or not such business activity is pursued for gain, profit
or other advantage, without the prior consent of the Company. In addition to the
performance of his duties for the Company, Executive agrees to perform such
additional services for the Company as the board of directors of the Company
reasonably may request and which are consistent with his position as Senior Vice
President, Drug Development of the Company. 

         1.3 DUTY TO ACT IN THE BEST INTEREST OF THE COMPANY. Executive shall
not act in any manner, directly or indirectly, which may damage the business of
the Company or its affiliates or which would adversely affect the goodwill,
reputation or business relations of the Company or its affiliates with their
customers, the public generally or with any of their other employees. 

SECTION 2: TERM OF EMPLOYMENT

         2.1 TERM. The term of Executive's employment with the Company shall
commence as of the Effective Time, as defined in the Merger Agreement, and shall
continue for a period of five (5) years from the Effective Time (the "Initial
Term"). Commencing not less than one month before the end of the Initial Term or
any additional term, if either party so desires, the Company and the Executive
shall negotiate in good faith to renew this Agreement for a one-year period on
terms and conditions set forth in the Agreement. This Agreement and Executive's
employment also may be terminated as provided for in Sections 2.2, 2.3 or 2.4 of
this Agreement.

         2.2 TERMINATION FOR CAUSE. The Company shall have the right to
terminate Executive's employment hereunder for the following causes (a
"Termination for Cause"): 

         (a)      Conviction of Executive for, or entry of a plea of guilty or
                  nolo contendere by Executive with respect to, any felony or
                  any crime involving an act of moral turpitude;

         (b)      Commission by Executive of any act of fraud toward the Company
                  or any of its affiliates;

         (c)      Conduct which is materially detrimental to the reputation,
                  goodwill or business operations of the Company or its
                  affiliates;

         (d)      Neglect by Executive of his duties or breach by Executive of
                  his duties or intentional misconduct by Executive in
                  discharging such duties, in each case which is material in the
                  context of his employment relationship with the Company;

                                       2
<PAGE>   3

         (e)      Executive's continued absence from his duties without the
                  consent of the board of directors of the Company after receipt
                  of notification from the board referring to this clause, other
                  than absence due to bona fide illness or disability, as
                  defined herein;

         (f)      Executive's failure or refusal to comply with the directions
                  of the board of directors of the Company or with the policies,
                  standards and regulations of the Company or its affiliates,
                  provided that such directions, policies, standards or
                  regulations do not require Executive (i) to take any action
                  which is illegal, immoral or unethical or (ii) to fail to take
                  any action required by applicable law, regulations or
                  licensing standards, in each case where such failure or
                  refusal to comply continues after receipt of the notification
                  from the board of directors referring to this clause; or

         (g)      Executive's breach of the restrictive covenants set forth in
                  Section 5 of this Agreement, in such case where such breach
                  continues after a five (5) day period immediately following
                  receipt of notification from the board of directors of the
                  Company referring to this clause.

Upon the effectiveness of any Termination for Cause by the Company, payment of
all compensation to Executive under this Agreement shall cease immediately
(except for any payment of compensation accrued but unpaid through the date of
such Termination for Cause).

         2.3 TERMINATION BY THE COMPANY WITHOUT CAUSE. The Company shall have
the right to terminate this Agreement and Executive's employment without cause
upon ten (10) days' prior written notice to Executive. If the Company terminates
this Agreement and Executive's employment without cause pursuant to this Section
2.3, Executive shall receive his Base Compensation, as that term is defined in
Section 3.1 of this Agreement, for the remainder of the then current term of
this Agreement. Upon such termination, Executive shall not receive any further
compensation pursuant to Sections 3.2 or 3.3 of this Agreement, except as
required by law. In the event of termination without cause, Executive
acknowledges that the Company shall have no liability to him whatsoever other
than its obligation to pay him his Base Compensation for the remainder of the
then current term of this Agreement pursuant to Section 3.1.

         2.4 TERMINATION DUE TO DISABILITY OR DEATH. If Executive is unable to
perform his duties under this Agreement by reason of physical or mental
disability, this Agreement shall terminate, and, upon such termination,
Executive shall continue to receive the compensation described in Section 3 of
this Agreement, reduced by any disability payment received under a Company plan
or policy to which Executive may be entitled in lieu of such compensation, for a
period of six (6) months following termination. At the expiration of the six (6)
month period, payment of all compensation to Executive under this Agreement
shall cease immediately (except for any payment of compensation accrued but
unpaid through that date). The term "disability" as used herein shall mean a
condition which prohibits Executive from performing his duties substantially in
the manner he is capable of performing them on the date of this Agreement, which
cannot be removed by reasonable accommodations on the part of the Company, for
ninety (90) days or more during any one (1) year period.

         If Executive should die during the term of this Agreement, this
Agreement shall terminate and all payments to Executive under this Agreement
shall cease immediately (except for any such payments accrued but unpaid through
the date of death).

                                       3
<PAGE>   4

SECTION 3: COMPENSATION

         3.1 BASE COMPENSATION. Subject to Sections 2 and 5.5 of this Agreement,
during the term of this Agreement, the Company shall pay to Executive an initial
annual salary of $141,360 ("Base Compensation"), such annual salary to be
reviewed for increase, if any, by the Company in accordance with Company
policies but not less frequently than intervals of fourteen (14) months from
January 1, 1997. The Base Compensation shall be paid in conformity with the
Company's policy relating to salaried employees and shall be subject to all
required deductions and withholdings.

         3.2 REIMBURSEMENT OF BUSINESS EXPENSES During the term of this
Agreement, the Company shall reimburse Executive for all ordinary and reasonable
business expenses incurred by him in connection with the Business. Reimbursement
of such expenses shall be paid monthly, upon submission by Executive to the
Company of vouchers itemizing such expenses in a form conforming to Company
policy.

         3.3 BENEFITS. During the term of this Agreement, Executive shall be
entitled to such insurance, medical, savings and investment plans, sick leave,
holiday, education and continuing education assistance and other benefits as may
be given from time to time to other similarly-situated employees of the Company,
as determined from time to time by the Company. Executive shall be entitled to a
number of vacation days in accordance with Company policy. Executive may request
unpaid leave benefits at any time, which benefits may be granted at the sole
discretion of the board of directors of the Company.

SECTION 4: ALL BUSINESS TO BE THE PROPERTY OF THE COMPANY; ASSIGNMENT

         Executive agrees that the Business and all business developed by him
relating to the Business, including, without limitation, software, contracts,
fees, commissions, customer lists and any other incident of any business
developed or sought by the Company or its affiliates, or earned or carried on by
Executive for the Company, are and shall be the exclusive property of the
Company for its sole use.

         Executive hereby grants and assigns to the Company (without additional
compensation) his entire right, title and interest under applicable laws in and
to all software products and modifications thereto, inventions, patents, patent
applications, research, information, customer lists, all other technical and
research data, and copyrighted material made, conceived, developed or acquired
by him solely or jointly with others during the period of his employment by the
Company, but only to the extent the foregoing pertains to the Business.

SECTION 5: COVENANTS OF NONDISCLOSURE, NONSOLICITATION AND NONCOMPETITION

         5.1 NONDISCLOSURE. During the term of his employment with the Company
and for five (5) years after the termination of his employment with the Company
for any reason, Executive shall not, and Executive shall use his best efforts
(which best efforts shall include, without limitation, notifying the board of
directors of the Company of any suspected breach of this Section 5.1) to ensure
that any persons or entities over which Executive has control do not, directly
or indirectly, use any proprietary and confidential information of the Company
or its affiliates for any purpose not associated with activities of the Company
or its affiliates, or disseminate or disclose any such information to any person
or entity not affiliated or associated with the Company. Such proprietary and
confidential information includes, without limitation, sales methods,
prospecting methods, customer lists, computer technology, programs and data,
whether on-line or off-loaded on disk format, methods of presentation and any
other plans, programs and materials used in managing, marketing or furthering
the business of the Company and its affiliates. Upon termination of Executive's
employment relationship with the Company, Executive shall return to the Company
all documents, records, notebooks, manuals, computer disks and similar
repositories of or containing the proprietary and confidential information of
the Company or its affiliates, 

                                       4
<PAGE>   5

including all copies thereof, then in Executive's possession or control, whether
prepared by Executive or otherwise. Executive shall undertake all reasonably
necessary and appropriate steps to insure that the confidentiality of
proprietary and confidential information of the Company and its affiliates shall
be maintained.

         5.2 NONSOLICITATION. For a period of five (5) years after the
termination of Executive's employment with the Company for any reason, Executive
shall not (i) solicit, service or in any way or to any degree handle (other than
as are permitted in Section 5.3) any business similar to that performed by
Executive for the Company or its affiliates, for any person, firm or entity
which is a customer or actively marketed prospect of the Company or such
affiliates for which the Executive has performed services or which becomes a
customer or actively marketed prospect of the Company or such affiliates during
the term of Executive's employment, whether or not a customer or prospect of the
Company shall have been handled, serviced or produced by Executive, (ii) divert
or attempt to divert any such customer or prospect or (iii) announce or
advertise to the general public his former employment by or connections with the
Company or its affiliates. For purposes of this Section 5.2, the term customer
shall not include any entity which has not conducted business with the Company
or any such affiliate during the three-year period immediately preceding the
Executive's termination of employment.

         For a period of five (5) years after the termination of Executive's
employment with the Company for any reason, Executive shall not solicit, take
away, hire, employ or endeavor to employ any of the employees of the Company or
any of its affiliates for which the Executive has performed services.

         5.3 NONCOMPETITION. Executive acknowledges that the Business was
conducted prior to the date of this Agreement by the Company throughout North
America, South America and Europe (the "Restricted Area") and, therefore, agrees
that, during the term of his employment with the Company and for five (5) years
after the termination of his employment with the Company for any reason, he
shall not, without the prior written consent of the Company, directly or
indirectly, own, develop, manage, operate, join, control or participate in the
ownership, management, operation or control of, or become an employee or
independent contractor of, or consultant to, any business which competes with
the Business as conducted by the Company or any of its subsidiary companies, or
any of its successors in the past, during the term of Executive's employment
hereunder, for the duration of Executive's agreement not to compete pursuant to
this Section 5.3., by selling such products, or providing such services, as the
Company, or any of its subsidiary companies, or any of its successors, sells or
provides. This restriction will apply within the Restricted Area. The foregoing
notwithstanding, nothing herein shall be construed so as to prohibit or restrict
Executive from (i) activities of the type described above where the business is
not a CRO (or is not then contemplated to be a CRO) but is a manufacturer of
pharmaceuticals, therapeutics or diagnostics provided that such manufacturer is
not a customer for which the Business has provided services within the one-year
period preceding the Executive's employment with the manufacturer, or (ii)
owning less than five percent (5%) of the outstanding common stock of any
corporation, the stock of which is publicly traded on a national securities
exchange or in the over-the-counter market, that competes with the Company.
Executive further agrees that, during his employment with the Company, he shall
use his best efforts to preserve the Business and the organization of the
Company, to keep available to the Company the services of its employees, and to
preserve for the Company its and his favorable business relationships with
suppliers, customers and others with whom the Company and Executive have
business relationships.

         5.4 APPLICABILITY. The provisions of Sections 5.1, 5.2 and 5.3 of this
Agreement shall apply to all terminations of Executive's employment with the
Company, regardless of the cause or circumstances thereof and whether such
termination was voluntary or involuntary, for cause or without cause, provided
the Company complies in all material respects with Section 2.3. Further,
Executive's covenants of nondisclosure, noncompetition and nonsolicitation,
along with the Company's remedies for the breach or threatened breach of those
covenants, shall remain in effect following the termination of this Agreement
and Executive's employment, regardless of the cause or circumstances thereof and
whether such

                                       5
<PAGE>   6

termination was voluntary or involuntary, for cause or without cause, provided
the Company in all respects complies with Section 2.3. 

         5.5 REMEDIES. In view of the services which Executive will perform for
the Company, which are special, unique, extraordinary and intellectual in
character, which place him in a position of confidence and trust with the
customers and employees of the Company and its affiliates, and which provide
him with access to confidential financial information, trade secrets,
"know-how" and other confidential and proprietary information of the Company
and its affiliates, in view of the geographic scope and nature of the business
in which the Company and its affiliates are engaged, and recognizing the value
of this Agreement to him, Executive expressly acknowledges that the restrictive
covenants set forth in this Agreement, including, without limitation, the
geographic scope of such covenants, are necessary in order to protect and
maintain the proprietary interests and other legitimate business interests of
the Company and its affiliates, and that the enforcement of such restrictive
covenants shall not prevent him from earning a livelihood. Executive also
acknowledges that the scope of the operations of the Company and its affiliates
are such that it is reasonable that the restrictions set forth in this
Agreement are not more limited as to geographic area than is set forth herein.
Executive further acknowledges that the remedy at law for any breach or
threatened breach of this Agreement will be inadequate and, accordingly, that
the Company, in addition to all other available remedies (including, without
limitation, seeking such damages as they have sustained by reason of such
breach), shall be entitled to injunctive or any other appropriate form of
equitable relief. Notwithstanding anything in this Agreement to the contrary,
in the event Executive breaches any of the covenants of nondisclosure,
nonsolicitation or noncompetition set forth in Sections 5.1, 5.2 and 5.3 of
this Agreement, he shall not receive any further payments from the Company
pursuant to this Agreement. The Company shall be entitled to seek a restraining
order or injunction in any court of competent jurisdiction to prevent any
continuation of any violation of the provisions of this Section 5 and the
Executive hereby consents that such restraining order or injunction may be
granted without the necessity of the posting of any bond by the Company.

SECTION 6: WARRANTS

         Upon commencement of and as compensation, in part, for Executive's
employment pursuant to this Agreement, Executive shall be granted warrants to
purchase 60,000 shares of the common stock, par value $1.00 per share, of
Omnicare (the "Omnicare Common Stock"). The warrants shall be substantially in
the form attached hereto as Exhibit A. The Executive shall comply with the terms
of the warrants.

SECTION 7:  MISCELLANEOUS PROVISIONS

         7.1 ASSIGNMENT AND SUCCESSORS. If the Company sells all or
substantially all of the assets of the Business, the rights and obligations of
the Company under this Agreement may be assigned without Executive's consent. In
all other circumstances, the rights and obligations of the Company under this
Agreement may be assigned with Executive's consent (which shall not be
unreasonably withheld) and shall inure to the benefit of and be binding upon the
successors and assigns of the Company. Executive's obligation to provide
services hereunder may not be assigned to or assumed by any other person or
entity, except as provided above.

         7.2 NOTICES. All notices, requests, demands, or other communications
under this Agreement shall be in writing and shall be delivered by hand or
mailed, by fax (receipt confirmed), by express mail services or by registered or
certified mail, postage prepaid, to the Company c/o Omnicare, Inc., 2800 Chemed
Center, 255 East Fifth Street, Cincinnati, Ohio 45202, and to Executive at his
address as shown in the Company's records. Notices, requests, demands, and other
communications so delivered shall be deemed given upon receipt.

         7.3 SEVERABILITY. If any provision or portion of this Agreement shall
be or become illegal, invalid or unenforceable in whole or in part for any
reason, such provision shall be ineffective only to the 

                                       6
<PAGE>   7

extent of such illegality, invalidity or unenforceability, without invalidating
the remainder of such provision or the remaining provisions of this Agreement.
If any court of competent jurisdiction should deem any covenant herein to be
invalid, illegal or unenforceable because its scope is considered excessive,
such covenant shall be modified so that the scope of the covenant is reduced
only to the minimum extent necessary to render the modified covenant valid,
legal and enforceable.

         7.4 INTEGRATION, AMENDMENT AND WAIVER. This Agreement constitutes the
entire agreement among the parties hereto, superseding all prior arrangements
and agreements, and may be modified, amended or waived only by a written
instrument signed by the parties hereto.

         7.5 GOVERNING LAW. This Agreement shall be construed in accordance with
and governed for all purposes by the laws of the State of Ohio applicable to
contracts executed and wholly-performed within such State.

         7.6 INTERPRETATION. The headings contained in this Agreement are for
reference purposes only, and shall not affect in any way the meaning or
interpretation of this Agreement. The language in all parts of this Agreement
shall in all cases be construed according to its fair meaning, and not strictly
for or against any party hereto. In this Agreement, unless the context otherwise
requires, the singular and the plural include one another.

         7.7 NON-WAIVER OF RIGHTS AND BREACHES. No failure or delay of any party
herein in the exercise of any right given to such party hereunder shall
constitute a waiver thereof unless the time specified herein for the exercise of
such right has expired, nor shall any single or partial exercise of any right
preclude other or further exercise thereof or of any other right. The waiver by
a party hereto of any default of any other party shall not be deemed to be a
waiver of any subsequent default or other default by such party.

         7.8 DISPUTE RESOLUTION.

         (a)      (i) Any dispute, controversy or claim arising out of or
                  relating to this Agreement or any term or provision of this
                  Agreement, including, without limitation, any claim of breach,
                  termination or invalidity thereof, (ii) any matter subject to
                  arbitration under any provision of this Agreement and (iii)
                  any other matter which the parties agree to submit to
                  arbitration shall be settled by arbitration in accordance with
                  the Commercial Arbitration Rules of the American Arbitration
                  Association, and judgment on the award rendered by the
                  arbitrator(s) may be entered in any court having jurisdiction
                  thereof. Such arbitration proceedings shall be held in the
                  State of Ohio.

         (b)      Notwithstanding the foregoing, the Company at all times shall
                  have the right to bring an action to enforce the covenants and
                  seek the remedies set forth in Section 5 of this Agreement
                  (other than an action for monetary damages which is covered by
                  the dispute resolution provisions of Section 7.8(a) provided
                  that any arbitration proceedings for monetary damages sought
                  in connection with an injunction or other equitable relief
                  shall be under the supervision of the court in which such
                  relief is sought) through the courts as they deem necessary or
                  desirable in order to protect their confidential or
                  proprietary information or to prevent the occurrence of any
                  event which the Company believes will cause them to suffer
                  immediate and irreparable harm or damage. The parties agree
                  that any such action may be brought in a state or federal
                  court located within Cincinnati, Ohio. The parties waive any
                  and all objections to jurisdiction or venue. The parties
                  further agree that service of process may be made by

                                       7
<PAGE>   8


                  registered mail to the address referred to in Section 7.2 of
                  this Agreement, and that such service shall be deemed
                  effective service of process.

         7.9 COUNTERPARTS. This Agreement may be executed in any number of
counterparts by the parties hereto, each of which when so executed shall be
deemed an original and all of which taken together shall constitute one and the
same instrument.







                                       8
<PAGE>   9
     IN WITNESS WHEREOF, the parties hereto have executed this Agreement as of
the date first written above.

                                  COROMED, INC.

                                  By: /s/ Dale B. Evans
                                    -------------------------------
                                    Name: Dale B. Evans
                                    Title: President and CEO


                                  Executive: Thomas J. Massey



                                  By: /s/ Thomas J. Massey
                                    -------------------------------

                                        S.S. No. ###-##-####
                                                 ------------------




                                       9
<PAGE>   10



 

THIS WARRANT AND THE SECURITIES TO BE ISSUED UPON EXERCISE HEREOF HAVE NOT BEEN
REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT"),
OR THE SECURITIES LAWS OF ANY STATE. THIS WARRANT MAY NOT BE OFFERED, SOLD,
TRANSFERRED, PLEDGED OR HYPOTHECATED. THE SECURITIES ISSUABLE UPON EXERCISE
HEREOF MAY NOT BE OFFERED, SOLD, TRANSFERRED, PLEDGED, HYPOTHECATED OR OTHERWISE
DISPOSED OF EXCEPT PURSUANT TO (i) AN EFFECTIVE REGISTRATION STATEMENT UNDER THE
SECURITIES ACT AND ANY APPLICABLE STATE SECURITIES LAWS, (ii) TO THE EXTENT
APPLICABLE, RULE 144 UNDER THE SECURITIES ACT (OR ANY SIMILAR RULE UNDER THE
SECURITIES ACT RELATING TO THE DISPOSITION OF SECURITIES) OR (iii) AN OPINION OF
COUNSEL, IF SUCH OPINION SHALL BE REASONABLY SATISFACTORY TO COUNSEL TO THE
ISSUER, THAT AN EXEMPTION FROM REGISTRATION UNDER THE SECURITIES ACT AND
APPLICABLE STATE LAW IS AVAILABLE.

                                    Dated: December 29, 1997
                                    No: ____

                                     WARRANT

To Purchase up to an aggregate of 60,000 shares of Common Stock, $1.00 par value
("Common Stock"), of

                                 OMNICARE, INC.

         THIS IS TO CERTIFY THAT, for value received, Thomas J. Massey
(hereinafter referred to as the "Holder"), is entitled to purchase from
Omnicare, Inc., a Delaware Corporation (the "Company"), at any time and from
time to time during the period from the date hereof to and including the
Expiration Date, at the offices of the Warrant Agent (as hereinafter defined),
at the Exercise Price (as hereinafter defined), up to an aggregate of 60,000
shares of Common Stock, subject to adjustment and upon the terms and conditions
as hereinafter provided, and is also entitled to exercise the other appurtenant
rights, powers and privileges hereinafter described.

         This Warrant is being issued in connection with that certain Employment
Agreement between Coromed, Inc., a Delaware corporation and a wholly owned
subsidiary of the Company ("Coromed"), and the Holder, dated as of the date
hereof (the "Employment Agreement").

         Certain terms used in this Warrant are defined in Article V.

                                   ARTICLE I

                               EXERCISE OF WARRANT

         1.1 METHOD OF EXERCISE. To exercise this Warrant in whole or in part,
the Holder shall deliver to the Company, at the Warrant Agent, (a) this Warrant,
(b) a written notice, in substantially the form of the Subscription Notice
attached hereto as Exhibit A, of such Holder's election to exercise this
Warrant, which notice shall specify the number of shares of Common Stock to be
purchased (in lots of not less than 1,000 shares), the denominations of the
share certificate or certificates desired and the name or names in which such
certificates are to be registered and (c) payment of the Exercise Price with
respect to such shares. Such payment may be made, at the option of the Holder,
by cash, certified or bank cashier's check or wire transfer.

         In addition to and at the time of payment of the Exercise Price, the
Holder shall pay to the Company the full amount of all federal and state
withholding and other employment taxes applicable to the taxable income of such
Holder resulting from such exercise.

                                      
<PAGE>   11

         The Company shall as promptly as practicable and in any event within
five (5) Business Days after receipt of the Subscription Notice, execute and
deliver or cause to be executed and delivered, in accordance with such notice, a
certificate or certificates representing the aggregate number of shares of
Common Stock to which the Holder is entitled. The share certificate or
certificates so delivered shall be in such denominations as may be specified in
such notice or, if such notice shall not specify denominations, in denominations
of 1,000 shares each, and shall be issued in the name of the Holder or such
other name or names as shall be designated in such notice. Such certificate or
certificates shall be deemed to have been issued, and the Holder or any other
person so designated to be named therein shall be deemed for all purposes to
have become holders of record of such shares, as of the date the aforementioned
notice is received by the Company. If this Warrant shall have been exercised
only in part, the Company shall, at the time of delivery of the certificate or
certificates, deliver to the Holder a new Warrant evidencing the rights to
purchase the remaining shares of Common Stock called for by this Warrant, which
new Warrant shall in all other respects be identical with this Warrant, or, at
the request of the Holder, appropriate notation may be made on this Warrant
which shall then be returned to the Holder. The Company shall pay all expenses,
taxes and other charges payable in connection with the preparation, issuance and
delivery of share certificates and new Warrants, except that, if share
certificates shall be registered in a name or names other than the name of the
Holder, funds sufficient to pay all transfer taxes payable as a result of such
transfer shall be paid by the Holder at the time of delivering the
aforementioned notice of exercise or promptly upon receipt of a written request
of the Company for payment.

         1.2 SHARES TO BE FULLY PAID AND NONASSESSABLE; RESERVATION AND LISTING.
All shares of Common Stock issued upon the exercise of this Warrant shall be
validly issued, fully paid and nonassessable and the Company shall at all times
reserve and keep available out of its authorized shares of Common Stock, solely
for the purpose of issuance upon the exercise of this Warrant, such number of
shares of Common Stock as shall be exercisable hereof. If the Common Stock of
any class is then listed on any national securities exchange (as such term is
used in the Exchange Act (as defined herein)) or quoted on Nasdaq, the Company
shall cause the shares of Common Stock issuable upon exercise of this Warrant to
be duly listed or quoted thereon, as the case may be.

         1.3 NO FRACTIONAL SHARES TO BE ISSUED. The Company shall not be
required to issue fractions of shares of Common Stock upon exercise of this
Warrant. If any fraction of a share would, but for this Section, be issuable
upon any exercise of this Warrant, in lieu of such fractional share the Company
shall pay to the Holder in cash, an amount equal to the same fraction of the
current Market Price per share of outstanding Common Stock on the Business Day
immediately prior to the date of such exercise.

         1.4 SHARE LEGEND. Each certificate for shares of Common Stock issued
upon exercise of this Warrant, unless at the time of exercise such shares are
registered under the Securities Act, shall bear the following legend:

                  THIS SECURITY HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT
         OF 1933, AS AMENDED (THE "SECURITIES ACT"), OR THE SECURITIES LAWS OF
         ANY STATE AND MAY NOT BE OFFERED, SOLD, TRANSFERRED, PLEDGED,
         HYPOTHECATED EXCEPT PURSUANT TO (i) AN EFFECTIVE REGISTRATION STATEMENT
         UNDER THE SECURITIES ACT AND ANY APPLICABLE STATE SECURITIES LAWS, (ii)
         TO THE EXTENT APPLICABLE, RULE 144 UNDER THE SECURITIES ACT (OR ANY
         SIMILAR RULE UNDER THE SECURITIES ACT RELATING TO THE DISPOSITION OF
         SECURITIES), OR (iii) AN OPINION OF COUNSEL, IF SUCH OPINION SHALL BE
         REASONABLY SATISFACTORY TO COUNSEL TO THE ISSUER, THAT AN EXEMPTION
         FROM REGISTRATION UNDER THE SECURITIES ACT AND APPLICABLE STATE LAW IS
         AVAILABLE.

         Any certificate issued at any time in exchange or substitution for any
certificate bearing such legend (except a new certificate issued upon completion
of a public distribution pursuant to a registration statement under the
Securities Act) shall also bear such legend unless, in the opinion of 


                                       2
<PAGE>   12

counsel selected by the holder of such certificate and reasonably acceptable to
counsel to the Company, the securities represented thereby need no longer be
subject to restrictions on resale under the Securities Act or any state
securities laws.

                                   ARTICLE II

                        WARRANT AGENT; TRANSFER, EXCHANGE
                           AND REPLACEMENT OF WARRANTS

         2.1 WARRANT AGENT. Until such time, if any, as an independent agent
shall be appointed by the Company to perform services with respect to the
Warrant described herein (the "Warrant Agent"), the Company shall perform the
obligations of the Warrant Agent provided herein at its principal office address
or such other address in the United States as the Company shall specify by prior
written notice to the Holder.

         2.2 OWNERSHIP OF WARRANT. The Company shall treat the Holder as the
holder and owner hereof for all purposes (and shall not be affected by any
notice to the contrary which shall not be effective). 

         2.3 NO TRANSFER. The Holder of this Warrant, by its acceptance hereof,
covenants and agrees that such Warrant may not be sold, transferred, pledged or
hypothecated. The Common Stock issuable upon exercise hereof may not be sold,
transferred, pledged, hypothecated or otherwise disposed of unless registered
pursuant to the Securities Act or the Company shall have been supplied with an
opinion of counsel reasonably satisfactory to the Company's counsel that such
transfer is not in violation of the Securities Act and any applicable state
laws.

         2.4 DIVISION OR COMBINATION OF WARRANTS. This Warrant may be divided
(in lots exercisable for not less than 1,000 shares of Common Stock) or combined
with other Warrants upon surrender hereof. The Company shall execute and deliver
a new Warrant or Warrants in exchange for the Warrant or Warrants to be divided
or combined in accordance with such notice.

         2.5 LOSS, THEFT, DESTRUCTION OF WARRANT CERTIFICATES. Upon receipt of
evidence satisfactory to the Company of the loss, theft, destruction or
mutilation of any Warrant and, in the case of any such loss, theft or
destruction, upon receipt of indemnity or security satisfactory to the Company,
or, in the case of any such mutilation, upon surrender and cancellation of such
Warrant, the Company, at Holder's expense, will make and deliver, in lieu of
such lost, stolen, destroyed or mutilated Warrant, a new Warrant of like tenor
and representing the right to purchase the same aggregate number of shares of
Common Stock. 

                                  ARTICLE III

                              ADJUSTMENT PROVISIONS

         3.1 ADJUSTMENTS GENERALLY. The Exercise Price and the number of shares
of Common Stock (or other securities or property) issuable upon exercise of this
Warrant shall be subject to adjustment from time to time upon the occurrence of
certain events, as provided in this Article III.

         3.2 COMMON STOCK REORGANIZATIONS AND DISTRIBUTIONS. If the Company
shall (i) subdivide its outstanding shares of Common Stock into a greater number
of shares or consolidate its outstanding shares of Common Stock into a smaller
number of shares (any such event being called a "Common Stock Reorganization")
or (ii) pay a dividend in shares of Common Stock or make a distribution in
shares of Common Stock on its outstanding shares of Common Stock, other than
pursuant 


                                       3
<PAGE>   13

to a Common Stock Reorganization (any such event being herein called a "Common
Stock Distribution"), then (A) the Exercise Price shall be adjusted, effective
immediately after the record date at which the holders of Common Stock are
determined for purposes of such Common Stock Reorganization or Common Stock
Distribution, to a price determined by multiplying the Exercise Price in effect
immediately prior to such record date by a fraction, the numerator of which
shall be the number of shares of Common Stock outstanding on such record date
before giving effect to such Common Stock Reorganization or Common Stock
Distribution and the denominator of which shall be the number of shares of
Common Stock outstanding after giving effect to such Common Stock Reorganization
or Common Stock Distribution, and (B) the number of shares of Common Stock
subject to purchase upon exercise of this Warrant shall be adjusted, effective
at such time, to a number determined by multiplying the number of shares of
Common Stock subject to purchase immediately before such Common Stock
Reorganization or Common Stock Distribution by a fraction, the numerator of
which shall be the number of shares outstanding after giving effect to such
Common Stock Reorganization or Common Stock Distribution and the denominator of
which shall be the number of shares of Common Stock outstanding immediately
before such Common Stock Reorganization or Common Stock Distribution. 

         3.3 ADJUSTMENT RULES.

         (a) Any adjustments pursuant to this Article III shall be made
successively whenever an event referred to herein shall occur.

         (b) No adjustment shall be made pursuant to this Article III in respect
of the issuance from time to time of Common Stock upon the exercise of this
Warrant.

         (c) If the Company shall set a record date to determine the holders of
Common Stock for purposes of a Common Stock Reorganization or Common Stock
Distribution and shall legally abandon such action prior to effecting such
action, then no adjustment shall be made pursuant to this Article III in respect
of such action. 

         3.4 NOTICE OF ADJUSTMENT. As promptly as practicable after any action
is taken which requires an adjustment or readjustment pursuant to this Article
III, the Company shall give notice to the Holder of such event, and, if
determinable, the required adjustment and the computation thereof. If the
required adjustment is not determinable at the time of such notice, the Company
shall give notice to the Holder of such adjustment and computation promptly
after such adjustment becomes determinable.

                                   ARTICLE IV

                              FORM S-8 REGISTRATION

         4.1 FORM S-8 REGISTRATION. As promptly as reasonably practicable after
the Closing Date, the Company will prepare and file a registration statement on
Form S-8 (or any equivalent successor form under the Securities Act) to register
the Common Stock issuable upon exercise of this Warrant.

                                   ARTICLE V

                                   DEFINITIONS

         The following terms, as used in this Warrant, have the following
respective meanings:

         "BUSINESS DAY" means each day in which banking institutions in New York
are not required or authorized by law or executive order to close.

         "CLOSING DATE" means the date hereof.

                                       4
<PAGE>   14

         "COMMON STOCK" shall have the meaning set forth in the first paragraph
of this Warrant.

         "COMMON STOCK DISTRIBUTION" shall have the meaning set forth in Section
3.2.

         "COMMON STOCK REORGANIZATION" shall have the meaning set forth in
Section 3.2.

         "COMPANY" shall have the meaning set forth in the first paragraph of
this Warrant.

         "EMPLOYMENT AGREEMENT" shall have the meaning set forth in the second
paragraph of this Warrant.

         "EXCHANGE ACT" means the Securities Exchange Act of 1934, as amended.

         "EXERCISE PRICE" shall mean $29.275 for each share of Common Stock to
be issued upon exercise of this Warrant, subject to adjustment pursuant to
Article III.

         "EXPIRATION DATE" means the third day following the date on which the
Holder ceases for any reason to be employed by Coromed; provided, however, that
if the Holder's employment with Coromed is terminated by Coromed in a manner
that constitutes "Termination for Cause" (as defined in the Holder's employment
agreement), then "Expiration Date" shall mean the date on which the Holder
ceases for any reason to be employed by Coromed.

         "HOLDER" shall have the meaning set forth in the first paragraph of
this Warrant.

         "MARKET PRICE" means, with respect to Common Stock, the average of the
daily closing prices for the Common Stock on the ten (10) consecutive trading
days before the day in question. The closing price for each day shall be the
last reported sales price regular way or, in case no such reported sale takes
place on such date, the average of the reported closing bid and asked prices
regular way, in either case on the New York Stock Exchange ("NYSE"), or if the
Common Stock is not listed or admitted to trading on the NYSE, on the principal
securities exchange on which the Common Stock is listed or admitted to trading
or Nasdaq or, if not listed or admitted to trading on any securities exchange or
Nasdaq, the closing sale price of the Common Stock, or in case no reported sale
takes place, the average of the closing bid and asked prices, on any interdealer
quotation system or any comparable system, or if the Common Stock is not so
quoted, the parties hereto agree for the purposes of this Warrant that the
current market price shall be as determined in good faith by the Board of
Directors of the Company.

         "NASDAQ" means The Nasdaq Stock Market.

         "SECURITIES ACT" means the Securities Act of 1933, as amended.

         "WARRANT AGENT" shall have the meaning set forth in Section 2.1.

                                   ARTICLE VI

                                  MISCELLANEOUS

         6.1 EXPIRATION. This Warrant shall expire and be of no further force
and effect on the Expiration Date. 

         6.2 NOTICES. Any notice or other communication to be given hereunder
shall be in writing and shall be delivered by recognized courier, telecopy or
certified mail, return receipt requested, and shall be conclusively deemed to
have been received by a party hereto and to be effective on the day on which
delivered or telecopied to such party at its address set forth below (or at such
other address as such 

                                       5
<PAGE>   15

party shall specify to the other parties hereto in writing), or, if sent by
certified mail, on the third business day after the day on which mailed,
addressed to such party at such addresses.

         In the case of a Holder, such notices and communications shall be
addressed to its address as shown on the books maintained by the Warrant Agent,
unless the Holder shall notify the Company and the Warrant Agent that notices
and communications should be sent to a different address, in which case such
notices and communications shall be sent to the address specified by the Holder,
with a copy to: Morgan, Lewis & Bockius LLP, 2000 One Logan Square,
Philadelphia, PA 19103, Attention: John F. Bales, III, Esq., Facsimile No.:
(215) 963-5299. In the case of the Company, such notices and communications
shall be addressed as follows (until notice of a change is given as provided
herein): Omnicare, Inc., 2800 Chemed Center, 255 East Fifth Street, Cincinnati,
Ohio 45202, Attention: Joel F. Gemunder, Facsimile No.: 513-762-6905, with a
copy to: Dewey Ballantine LLP, 1301 Avenue of the Americas, New York, NY 10019,
Attention: Morton A. Pierce, Esq., Facsimile No.: 212-259-6333.

         6.3 WAIVERS; AMENDMENTS. No failure or delay of the Holder in
exercising any power or right hereunder shall operate as a waiver thereof, nor
shall any single or partial exercise of such right or power, or any abandonment
or discontinuance of steps to enforce such a right or power, preclude any other
or further exercise thereof or the exercise of any other right or power. The
provisions of this Warrant may be amended, modified or waived with (and only
with) the written consent of the Company and the Holder.

         6.4 GOVERNING LAW This Warrant shall be construed in accordance with
and governed by the laws of the State of Delaware without regard to choice of
law principles.

         6.5 SURVIVAL OF AGREEMENTS. All covenants and agreements made by the
parties herein shall be considered to have been relied upon by each party and
shall survive the issuance and delivery of the Warrant, and shall continue in
full force and effect so long as this Warrant is outstanding. 

         6.6 COVENANTS TO BIND SUCCESSOR AND ASSIGNS. All covenants,
stipulations, promises and agreements in this Warrant contained by or on behalf
of the Company shall bind its successors and assigns, whether so expressed or
not.

         6.7 SEVERABILITY. In case any one or more of the provisions contained
in this Warrant shall be invalid, illegal or unenforceable in any respect, the
validity, legality and enforceability of the remaining provisions contained
herein and therein shall not in any way be affected or impaired thereby. The
parties shall endeavor in good faith negotiations to replace the invalid,
illegal or unenforceable provisions with valid provisions the economic effect of
which comes as close as possible to that of the invalid, illegal or
unenforceable provisions. 

         6.8 SECTION HEADINGS. The section headings used herein are for
convenience of reference only, are not part of this Warrant and are not to
affect the construction of or be taken into consideration in interpreting this
Warrant. 

         6.9 NO RIGHTS AS STOCKHOLDER. This Warrant shall not entitle any Holder
to any rights as a stockholder of the Company and no dividends shall be payable
or accrue in respect of this Warrant or the interest represented hereby or the
shares of Common Stock underlying this Warrant exercisable hereunder unless and
until and only to the extent this Warrant shall be exercised. 

         6.10 NO REQUIREMENT TO EXERCISE. Nothing contained in this Warrant
shall be construed as requiring the Holder to exercise this Warrant.



                                       6
<PAGE>   16


         IN WITNESS WHEREOF, Omnicare, Inc. has caused this Warrant to be
executed in its corporate name by one of its officers thereunto duly authorized.

                                 OMNICARE, INC.

                                 By: /s/ Cheryl D. Hodges
                                   ---------------------------
                                      Name: Cheryl D. Hodges
                                      Title: Senior Vice President and
                                        Secretary





                                       7
<PAGE>   17


 

                               SUBSCRIPTION NOTICE

                    (To be executed upon exercise of Warrant)

To:  OMNICARE, INC.

         The undersigned hereby irrevocably elects to exercise the right of
purchase represented by the attached Warrant for, and to purchase thereunder,
____________ shares of Common Stock, as provided for therein, and tenders
herewith payment of the Exercise Price in full in the form of certified or bank
cashier's check or wire transfer.

         Please issue a certificate or certificates for such shares of Common
Stock in the following name or names and denominations:





         If said number of shares shall not be all the shares issuable upon
exercise of the attached Warrant, a new Warrant is to be issued in the name of
the undersigned for the balance remaining of such shares less any fraction of a
share paid in cash.

Dated:
                           __________________________________________________
                           NOTE:    The above signature should correspond
                                    exactly with the name on the face of the
                                    attached Warrant.





                                       8

<PAGE>   1




                                                                    EXHIBIT 10.4

                              EMPLOYMENT AGREEMENT

         THIS EMPLOYMENT AGREEMENT (this "Agreement") is made this 29th day of
December, 1997, by and between Dr. Ronald E. Weishaar ("Executive") and COROMED,
Inc., a Delaware corporation (the "Company");

         WHEREAS, pursuant to the Amended and Restated Agreement and Plan of
Merger, dated as of August 19, 1997, as amended as of November 4, 1997 (the
"Merger Agreement"), among Omnicare, Inc., a Delaware corporation ("Omnicare"),
Coromed Acquisition Corporation, a Delaware corporation and a wholly-owned
subsidiary of Omnicare ("Merger Sub"), the Company and certain stockholders of
the Company, Merger Sub will be merged with and into the Company with the
Company surviving the merger as a wholly-owned subsidiary of Omnicare;

         WHEREAS, the Company previously employed the Executive as Senior Vice
President, Drug Research;

         WHEREAS, the Company is a contract research organization ("CRO")
providing contract research services to third parties of the type identified
below and desires to continue to employ Executive as its Senior Vice President,
Drug Research for the purpose of engaging in its business of researching,
developing and testing of pharmaceuticals, therapeutics, medical devices and
diagnostics, the development and management of study designs, systems and
procedures, data management, clinical and statistical analysis, biochemical
analyses, chemical synthesis, validation, evaluation, support services,
regulatory submissions and marketing and post-marketing support in relation to
any such products (the "Business"), and Executive desires to be employed by the
Company for such purpose; and

         WHEREAS, the Executive shall have access to confidential financial
information, trade secrets and other confidential and proprietary information of
the Company and Omnicare and its subsidiaries.

         NOW, THEREFORE, in consideration of these recitals and the mutual
covenants and agreements hereinafter set forth, and other good and valuable
consideration, the receipt and sufficiency of which are hereby acknowledged, the
parties hereto agree as follows:

SECTION 1: EMPLOYMENT

         1.1 DUTIES. The Company shall employ Executive as Senior Vice
President, Drug Research of the Company upon the terms and conditions set forth
in this Agreement. Executive shall have such duties as are customary for such
office and which may be assigned to Executive from time to time by the Company.
The principal place of the business of the Executive during the term of the
Agreement shall be in the greater Albany, New York area.

         1.2 BEST EFFORTS. Executive agrees to devote his best efforts and his
full time and attention to the performance of his duties under this Agreement,
and to perform such duties in a trustworthy and businesslike manner. In
addition, Executive agrees that he shall not, directly or indirectly, engage or
participate in, or become employed by or render advisory or consulting services
or other services in connection with, any business activity other than that of
the Company, whether or not such business activity is pursued for gain, profit
or other advantage, without the prior consent of the Company. In addition to the
performance of his duties for the Company, Executive agrees to perform such
additional services for the Company as the board of directors of the Company
reasonably may request and which are consistent with his position as Senior Vice
President, Drug Research of the Company. 

                                       
<PAGE>   2

         1.3 DUTY TO ACT IN THE BEST INTEREST OF THE COMPANY. Executive shall
not act in any manner, directly or indirectly, which may damage the business of
the Company or its affiliates or which would adversely affect the goodwill,
reputation or business relations of the Company or its affiliates with their
customers, the public generally or with any of their other employees.

SECTION 2: TERM OF EMPLOYMENT

         2.1 TERM. The term of Executive's employment with the Company shall
commence as of the Effective Time, as defined in the Merger Agreement, and shall
continue for a period of five (5) years from the Effective Time (the "Initial
Term"). Commencing not less than one month before the end of the Initial Term or
any additional term, if either party so desires, the Company and the Executive
shall negotiate in good faith to renew this Agreement for a one-year period on
terms and conditions set forth in the Agreement. This Agreement and Executive's
employment also may be terminated as provided for in Sections 2.2, 2.3 or 2.4 of
this Agreement.

         2.2 TERMINATION FOR CAUSE. The Company shall have the right to
terminate Executive's employment hereunder for the following causes (a
"Termination for Cause"): 

         (a)      Conviction of Executive for, or entry of a plea of guilty or
                  nolo contendere by Executive with respect to, any felony or
                  any crime involving an act of moral turpitude;

         (b)      Commission by Executive of any act of fraud toward the Company
                  or any of its affiliates;

         (c)      Conduct which is materially detrimental to the reputation,
                  goodwill or business operations of the Company or its
                  affiliates;

         (d)      Neglect by Executive of his duties or breach by Executive of
                  his duties or intentional misconduct by Executive in
                  discharging such duties, in each case which is material in the
                  context of his employment relationship with the Company;

         (e)      Executive's continued absence from his duties without the
                  consent of the board of directors of the Company after receipt
                  of notification from the board referring to this clause, other
                  than absence due to bona fide illness or disability, as
                  defined herein;

         (f)      Executive's failure or refusal to comply with the directions
                  of the board of directors of the Company or with the policies,
                  standards and regulations of the Company or its affiliates,
                  provided that such directions, policies, standards or
                  regulations do not require Executive (i) to take any action
                  which is illegal, immoral or unethical or (ii) to fail to take
                  any action required by applicable law, regulations or
                  licensing standards, in each case where such failure or
                  refusal to comply continues after receipt of the notification
                  from the board of directors referring to this clause; or 

         (g)      Executive's breach of the restrictive covenants set forth in
                  Section 5 of this Agreement, in such case where such breach
                  continues after a five (5) day period immediately following
                  receipt of notification from the board of directors of the
                  Company referring to this clause. 

                                       2
<PAGE>   3

Upon the effectiveness of any Termination for Cause by the Company, payment of
all compensation to Executive under this Agreement shall cease immediately
(except for any payment of compensation accrued but unpaid through the date of
such Termination for Cause).

         2.3 TERMINATION BY THE COMPANY WITHOUT CAUSE. The Company shall have
the right to terminate this Agreement and Executive's employment without cause
upon ten (10) days' prior written notice to Executive. If the Company terminates
this Agreement and Executive's employment without cause pursuant to this Section
2.3, Executive shall receive his Base Compensation, as that term is defined in
Section 3.1 of this Agreement, for the remainder of the then current term of
this Agreement. Upon such termination, Executive shall not receive any further
compensation pursuant to Sections 3.2 or 3.3 of this Agreement, except as
required by law. In the event of termination without cause, Executive
acknowledges that the Company shall have no liability to him whatsoever other
than its obligation to pay him his Base Compensation for the remainder of the
then current term of this Agreement pursuant to Section 3.1.

         2.4 TERMINATION DUE TO DISABILITY OR DEATH. If Executive is unable to
perform his duties under this Agreement by reason of physical or mental
disability, this Agreement shall terminate, and, upon such termination,
Executive shall continue to receive the compensation described in Section 3 of
this Agreement, reduced by any disability payment received under a Company plan
or policy to which Executive may be entitled in lieu of such compensation, for a
period of six (6) months following termination. At the expiration of the six (6)
month period, payment of all compensation to Executive under this Agreement
shall cease immediately (except for any payment of compensation accrued but
unpaid through that date). The term "disability" as used herein shall mean a
condition which prohibits Executive from performing his duties substantially in
the manner he is capable of performing them on the date of this Agreement, which
cannot be removed by reasonable accommodations on the part of the Company, for
ninety (90) days or more during any one (1) year period.

         If Executive should die during the term of this Agreement, this
Agreement shall terminate and all payments to Executive under this Agreement
shall cease immediately (except for any such payments accrued but unpaid through
the date of death).

SECTION 3: COMPENSATION

         3.1 BASE COMPENSATION. Subject to Sections 2 and 5.5 of this Agreement,
during the term of this Agreement, the Company shall pay to Executive an initial
annual salary of $131,297 ("Base Compensation"), such annual salary to be
reviewed for increase, if any, by the Company in accordance with Company
policies but not less frequently than intervals of fourteen (14) months from
April 1, 1997. The Base Compensation shall be paid in conformity with the
Company's policy relating to salaried employees and shall be subject to all
required deductions and withholdings.

         3.2 REIMBURSEMENT OF BUSINESS EXPENSES.  During the term of this
Agreement, the Company shall reimburse Executive for all ordinary and reasonable
business expenses incurred by him in connection with the Business. Reimbursement
of such expenses shall be paid monthly, upon submission by Executive to the
Company of vouchers itemizing such expenses in a form conforming to Company
policy. 

         3.3 BENEFITS. During the term of this Agreement, Executive shall be
entitled to such insurance, medical, savings and investment plans, sick leave,
holiday, education and continuing education assistance and other benefits as may
be given from time to time to other similarly-situated employees of the Company,
as determined from time to time by the Company. Executive shall be entitled to a
number of vacation days in accordance with Company policy. Executive may request
unpaid leave benefits at any time, which benefits may be granted at the sole
discretion of the board of directors of the Company.

                                       3
<PAGE>   4

SECTION 4: ALL BUSINESS TO BE THE PROPERTY OF THE COMPANY; ASSIGNMENT

         Executive agrees that the Business and all business developed by him
relating to the Business, including, without limitation, software, contracts,
fees, commissions, customer lists and any other incident of any business
developed or sought by the Company or its affiliates, or earned or carried on by
Executive for the Company, are and shall be the exclusive property of the
Company for its sole use.

                  Executive hereby grants and assigns to the Company (without
additional compensation) his entire right, title and interest under applicable
laws in and to all software products and modifications thereto, inventions,
patents, patent applications, research, information, customer lists, all other
technical and research data, and copyrighted material made, conceived, developed
or acquired by him solely or jointly with others during the period of his
employment by the Company, but only to the extent the foregoing pertains to the
Business.

SECTION 5: COVENANTS OF NONDISCLOSURE, NONSOLICITATION AND NONCOMPETITION

         5.1 NONDISCLOSURE. During the term of his employment with the Company
and for five (5) years after the termination of his employment with the Company
for any reason, Executive shall not, and Executive shall use his best efforts
(which best efforts shall include, without limitation, notifying the board of
directors of the Company of any suspected breach of this Section 5.1) to ensure
that any persons or entities over which Executive has control do not, directly
or indirectly, use any proprietary and confidential information of the Company
or its affiliates for any purpose not associated with activities of the Company
or its affiliates, or disseminate or disclose any such information to any person
or entity not affiliated or associated with the Company. Such proprietary and
confidential information includes, without limitation, sales methods,
prospecting methods, customer lists, computer technology, programs and data,
whether on-line or off-loaded on disk format, methods of presentation and any
other plans, programs and materials used in managing, marketing or furthering
the business of the Company and its affiliates. Upon termination of Executive's
employment relationship with the Company, Executive shall return to the Company
all documents, records, notebooks, manuals, computer disks and similar
repositories of or containing the proprietary and confidential information of
the Company or its affiliates, including all copies thereof, then in Executive's
possession or control, whether prepared by Executive or otherwise. Executive
shall undertake all reasonably necessary and appropriate steps to insure that
the confidentiality of proprietary and confidential information of the Company
and its affiliates shall be maintained.

         5.2 NONSOLICITATION. For a period of five (5) years after the
termination of Executive's employment with the Company for any reason, Executive
shall not (i) solicit, service or in any way or to any degree handle (other than
as are permitted in Section 5.3) any business similar to that performed by
Executive for the Company or its affiliates, for any person, firm or entity
which is a customer or actively marketed prospect of the Company or such
affiliates for which the Executive has performed services or which becomes a
customer or actively marketed prospect of the Company or such affiliates during
the term of Executive's employment, whether or not a customer or prospect of the
Company shall have been handled, serviced or produced by Executive, (ii) divert
or attempt to divert any such customer or prospect or (iii) announce or
advertise to the general public his former employment by or connections with the
Company or its affiliates. For purposes of this Section 5.2, the term customer
shall not include any entity which has not conducted business with the Company
or any such affiliate during the three-year period immediately preceding the
Executive's termination of employment.

         For a period of five (5) years after the termination of Executive's
employment with the Company for any reason, Executive shall not solicit, take
away, hire, employ or endeavor to employ any of the employees of the Company or
any of its affiliates for which the Executive has performed services.

                                       4
<PAGE>   5

         5.3 NONCOMPETITION. Executive acknowledges that the Business was
conducted prior to the date of this Agreement by the Company throughout North
America, South America and Europe (the "Restricted Area") and, therefore, agrees
that, during the term of his employment with the Company and for five (5) years
after the termination of his employment with the Company for any reason, he
shall not, without the prior written consent of the Company, directly or
indirectly, own, develop, manage, operate, join, control or participate in the
ownership, management, operation or control of, or become an employee or
independent contractor of, or consultant to, any business which competes with
the Business as conducted by the Company or any of its subsidiary companies, or
any of its successors in the past, during the term of Executive's employment
hereunder, for the duration of Executive's agreement not to compete pursuant to
this Section 5.3., by selling such products, or providing such services, as the
Company, or any of its subsidiary companies, or any of its successors, sells or
provides. This restriction will apply within the Restricted Area. The foregoing
notwithstanding, nothing herein shall be construed so as to prohibit or restrict
Executive from (i) activities of the type described above where the business is
not a CRO (or is not then contemplated to be a CRO) but is a manufacturer of
pharmaceuticals, therapeutics or diagnostics provided that such manufacturer is
not a customer for which the Business has provided services within the one-year
period preceding the Executive's employment with the manufacturer; further
provided that if Executive is terminated without cause, upon expiration of the
current term of the Agreement, the one year limitation shall not apply, or (ii)
owning less than five percent (5%) of the outstanding common stock of any
corporation, the stock of which is publicly traded on a national securities
exchange or in the over-the-counter market, that competes with the Company.
Executive further agrees that, during his employment with the Company, he shall
use his best efforts to preserve the Business and the organization of the
Company, to keep available to the Company the services of its employees, and to
preserve for the Company its and his favorable business relationships with
suppliers, customers and others with whom the Company and Executive have
business relationships.

         5.4 APPLICABILITY. The provisions of Sections 5.1, 5.2 and 5.3 of this
Agreement shall apply to all terminations of Executive's employment with the
Company, regardless of the cause or circumstances thereof and whether such
termination was voluntary or involuntary, for cause or without cause, provided
the Company complies in all material respects with Section 2.3. Further,
Executive's covenants of nondisclosure, noncompetition and nonsolicitation,
along with the Company's remedies for the breach or threatened breach of those
covenants, shall remain in effect following the termination of this Agreement
and Executive's employment, regardless of the cause or circumstances thereof and
whether such termination was voluntary or involuntary, for cause or without
cause, provided the Company in all respects complies with Section 2.3. 

         5.5 REMEDIES. In view of the services which Executive will perform for
the Company, which are special, unique, extraordinary and intellectual in
character, which place him in a position of confidence and trust with the
customers and employees of the Company and its affiliates, and which provide him
with access to confidential financial information, trade secrets, "know-how" and
other confidential and proprietary information of the Company and its
affiliates, in view of the geographic scope and nature of the business in which
the Company and its affiliates are engaged, and recognizing the value of this
Agreement to him, Executive expressly acknowledges that the restrictive
covenants set forth in this Agreement, including, without limitation, the
geographic scope of such covenants, are necessary in order to protect and
maintain the proprietary interests and other legitimate business interests of
the Company and its affiliates, and that the enforcement of such restrictive
covenants shall not prevent him from earning a livelihood. Executive also
acknowledges that the scope of the operations of the Company and its affiliates
are such that it is reasonable that the restrictions set forth in this Agreement
are not more limited as to geographic area than is set forth herein. Executive
further acknowledges that the remedy at law for any breach or threatened breach
of this Agreement will be inadequate and, accordingly, that the Company, in
addition to all other available remedies (including, without limitation, seeking
such damages as they have sustained by reason of such breach), shall be entitled
to injunctive or any other appropriate form of equitable relief. Notwithstanding
anything in this Agreement to the contrary, in the event Executive breaches any
of the covenants of nondisclosure, nonsolicitation or noncompetition set forth
in 


                                       5
<PAGE>   6

Sections 5.1, 5.2 and 5.3 of this Agreement, he shall not receive any further
payments from the Company pursuant to this Agreement. The Company shall be
entitled to seek a restraining order or injunction in any court of competent
jurisdiction to prevent any continuation of any violation of the provisions of
this Section 5 and the Executive hereby consents that such restraining order or
injunction may be granted without the necessity of the posting of any bond by
the Company.

SECTION 6: WARRANTS

         Upon commencement of and as compensation, in part, for Executive's
employment pursuant to this Agreement, Executive shall be granted warrants to
purchase 60,000 shares of the common stock, par value $1.00 per share, of
Omnicare (the "Omnicare Common Stock"). The warrants shall be substantially in
the form attached hereto as Exhibit A. The Executive shall comply with the terms
of the warrants.

SECTION 7:  MISCELLANEOUS PROVISIONS

         7.1 ASSIGNMENT AND SUCCESSORS. If the Company sells all or
substantially all of the assets of the Business, the rights and obligations of
the Company under this Agreement may be assigned without Executive's consent. In
all other circumstances, the rights and obligations of the Company under this
Agreement may be assigned with Executive's consent (which shall not be
unreasonably withheld) and shall inure to the benefit of and be binding upon the
successors and assigns of the Company. Executive's obligation to provide
services hereunder may not be assigned to or assumed by any other person or
entity, except as provided above.

         7.2 NOTICES. All notices, requests, demands, or other communications
under this Agreement shall be in writing and shall be delivered by hand or
mailed, by fax (receipt confirmed), by express mail services or by registered or
certified mail, postage prepaid, to the Company c/o Omnicare, Inc., 2800 Chemed
Center, 255 East Fifth Street, Cincinnati, Ohio 45202, and to Executive at his
address as shown in the Company's records. Notices, requests, demands, and other
communications so delivered shall be deemed given upon receipt. 

         7.3 SEVERABILITY. If any provision or portion of this Agreement shall
be or become illegal, invalid or unenforceable in whole or in part for any
reason, such provision shall be ineffective only to the extent of such
illegality, invalidity or unenforceability, without invalidating the remainder
of such provision or the remaining provisions of this Agreement. If any court of
competent jurisdiction should deem any covenant herein to be invalid, illegal or
unenforceable because its scope is considered excessive, such covenant shall be
modified so that the scope of the covenant is reduced only to the minimum extent
necessary to render the modified covenant valid, legal and enforceable. 

         7.4 INTEGRATION, AMENDMENT AND WAIVER. This Agreement constitutes the
entire agreement among the parties hereto, superseding all prior arrangements
and agreements, and may be modified, amended or waived only by a written
instrument signed by the parties hereto. 

         7.5 GOVERNING LAW. This Agreement shall be construed in accordance with
and governed for all purposes by the laws of the State of Ohio applicable to
contracts executed and wholly-performed within such State. 

         7.6 INTERPRETATION. The headings contained in this Agreement are for
reference purposes only, and shall not affect in any way the meaning or
interpretation of this Agreement. The language in all parts of this Agreement
shall in all cases be construed according to its fair meaning, and not strictly
for or against any party hereto. In this Agreement, unless the context otherwise
requires, the singular and the plural include one another. 

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<PAGE>   7

         7.7 NON-WAIVER OF RIGHTS AND BREACHES. No failure or delay of any party
herein in the exercise of any right given to such party hereunder shall
constitute a waiver thereof unless the time specified herein for the exercise of
such right has expired, nor shall any single or partial exercise of any right
preclude other or further exercise thereof or of any other right. The waiver by
a party hereto of any default of any other party shall not be deemed to be a
waiver of any subsequent default or other default by such party. 

         7.8 DISPUTE RESOLUTION. 

                  (a)      (i) Any dispute, controversy or claim arising out of
                           or relating to this Agreement or any term or
                           provision of this Agreement, including, without
                           limitation, any claim of breach, termination or
                           invalidity thereof, (ii) any matter subject to
                           arbitration under any provision of this Agreement and
                           (iii) any other matter which the parties agree to
                           submit to arbitration shall be settled by arbitration
                           in accordance with the Commercial Arbitration Rules
                           of the American Arbitration Association, and judgment
                           on the award rendered by the arbitrator(s) may be
                           entered in any court having jurisdiction thereof.
                           Such arbitration proceedings shall be held in the
                           State of Ohio.

                  (b)      Notwithstanding the foregoing, the Company at all
                           times shall have the right to bring an action to
                           enforce the covenants and seek the remedies set forth
                           in Section 5 of this Agreement (other than an action
                           for monetary damages which is covered by the dispute
                           resolution provisions of Section 7.8(a) provided that
                           any arbitration proceedings for monetary damages
                           sought in connection with an injunction or other
                           equitable relief shall be under the supervision of
                           the court in which such relief is sought) through the
                           courts as they deem necessary or desirable in order
                           to protect their confidential or proprietary
                           information or to prevent the occurrence of any event
                           which the Company believes will cause them to suffer
                           immediate and irreparable harm or damage. The parties
                           agree that any such action may be brought in a state
                           or federal court located within Cincinnati, Ohio. The
                           parties waive any and all objections to jurisdiction
                           or venue. The parties further agree that service of
                           process may be made by registered mail to the address
                           referred to in Section 7.2 of this Agreement, and
                           that such service shall be deemed effective service
                           of process.

         7.9 COUNTERPARTS. This Agreement may be executed in any number of
counterparts by the parties hereto, each of which when so executed shall be
deemed an original and all of which taken together shall constitute one and the
same instrument.



                                       7
<PAGE>   8


 

         IN WITNESS WHEREOF, the parties hereto have executed this Agreement as
of the date first written above.

                                  COROMED, INC.                       
                                                                      
                                  By: /s/ Dale B. Evans               
                                     -----------------------------      
                                     Name: Dale B. Evans              
                                     Title: President and CEO         
                                                                      
                                  Executive: Dr. Ronald E. Weishaar   
                                                                      
                                                                      
                                  By: /s/ Ronald E. Weishaar          
                                     -----------------------------      
                                                                      
                                        S.S. No. ###-##-####          
                                                 -----------------    
 



                                       8
<PAGE>   9



THIS WARRANT AND THE SECURITIES TO BE ISSUED UPON EXERCISE HEREOF HAVE NOT BEEN
REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT"),
OR THE SECURITIES LAWS OF ANY STATE. THIS WARRANT MAY NOT BE OFFERED, SOLD,
TRANSFERRED, PLEDGED OR HYPOTHECATED. THE SECURITIES ISSUABLE UPON EXERCISE
HEREOF MAY NOT BE OFFERED, SOLD, TRANSFERRED, PLEDGED, HYPOTHECATED OR OTHERWISE
DISPOSED OF EXCEPT PURSUANT TO (I) AN EFFECTIVE REGISTRATION STATEMENT UNDER THE
SECURITIES ACT AND ANY APPLICABLE STATE SECURITIES LAWS, (II) TO THE EXTENT
APPLICABLE, RULE 144 UNDER THE SECURITIES ACT (OR ANY SIMILAR RULE UNDER THE
SECURITIES ACT RELATING TO THE DISPOSITION OF SECURITIES) OR (III) AN OPINION OF
COUNSEL, IF SUCH OPINION SHALL BE REASONABLY SATISFACTORY TO COUNSEL TO THE
ISSUER, THAT AN EXEMPTION FROM REGISTRATION UNDER THE SECURITIES ACT AND
APPLICABLE STATE LAW IS AVAILABLE.

                                    Dated: December 29, 1997
                                    No: ____

                                     WARRANT

To Purchase up to an aggregate of 60,000 shares of Common Stock, $1.00 par value
("Common Stock"), of

                                 OMNICARE, INC.

         THIS IS TO CERTIFY THAT, for value received, Dr. Ronald E. Weishaar
(hereinafter referred to as the "Holder"), is entitled to purchase from
Omnicare, Inc., a Delaware Corporation (the "Company"), at any time and from
time to time during the period from the date hereof to and including the
Expiration Date, at the offices of the Warrant Agent (as hereinafter defined),
at the Exercise Price (as hereinafter defined), up to an aggregate of 60,000
shares of Common Stock, subject to adjustment and upon the terms and conditions
as hereinafter provided, and is also entitled to exercise the other appurtenant
rights, powers and privileges hereinafter described.

         This Warrant is being issued in connection with that certain Employment
Agreement between Coromed, Inc., a Delaware corporation and a wholly owned
subsidiary of the Company ("Coromed"), and the Holder, dated as of the date
hereof (the "Employment Agreement").

         Certain terms used in this Warrant are defined in Article V.

                                   ARTICLE I

                               EXERCISE OF WARRANT

         1.1 METHOD OF EXERCISE. To exercise this Warrant in whole or in part,
the Holder shall deliver to the Company, at the Warrant Agent, (a) this Warrant,
(b) a written notice, in substantially the form of the Subscription Notice
attached hereto as Exhibit A, of such Holder's election to exercise this
Warrant, which notice shall specify the number of shares of Common Stock to be
purchased (in lots of not less than 1,000 shares), the denominations of the
share certificate or certificates desired and the name or names in which such
certificates are to be registered and (c) payment of the Exercise Price with
respect to such shares. Such payment may be made, at the option of the Holder,
by cash, certified or bank cashier's check or wire transfer.

         In addition to and at the time of payment of the Exercise Price, the
Holder shall pay to the Company the full amount of all federal and state
withholding and other employment taxes applicable to the taxable income of such
Holder resulting from such exercise.

                                       
<PAGE>   10

         The Company shall as promptly as practicable and in any event within
five (5) Business Days after receipt of the Subscription Notice, execute and
deliver or cause to be executed and delivered, in accordance with such notice, a
certificate or certificates representing the aggregate number of shares of
Common Stock to which the Holder is entitled. The share certificate or
certificates so delivered shall be in such denominations as may be specified in
such notice or, if such notice shall not specify denominations, in denominations
of 1,000 shares each, and shall be issued in the name of the Holder or such
other name or names as shall be designated in such notice. Such certificate or
certificates shall be deemed to have been issued, and the Holder or any other
person so designated to be named therein shall be deemed for all purposes to
have become holders of record of such shares, as of the date the aforementioned
notice is received by the Company. If this Warrant shall have been exercised
only in part, the Company shall, at the time of delivery of the certificate or
certificates, deliver to the Holder a new Warrant evidencing the rights to
purchase the remaining shares of Common Stock called for by this Warrant, which
new Warrant shall in all other respects be identical with this Warrant, or, at
the request of the Holder, appropriate notation may be made on this Warrant
which shall then be returned to the Holder. The Company shall pay all expenses,
taxes and other charges payable in connection with the preparation, issuance and
delivery of share certificates and new Warrants, except that, if share
certificates shall be registered in a name or names other than the name of the
Holder, funds sufficient to pay all transfer taxes payable as a result of such
transfer shall be paid by the Holder at the time of delivering the
aforementioned notice of exercise or promptly upon receipt of a written request
of the Company for payment.

         1.2 SHARES TO BE FULLY PAID AND NONASSESSABLE; RESERVATION AND LISTING.
All shares of Common Stock issued upon the exercise of this Warrant shall be
validly issued, fully paid and nonassessable and the Company shall at all times
reserve and keep available out of its authorized shares of Common Stock, solely
for the purpose of issuance upon the exercise of this Warrant, such number of
shares of Common Stock as shall be exercisable hereof. If the Common Stock of
any class is then listed on any national securities exchange (as such term is
used in the Exchange Act (as defined herein)) or quoted on Nasdaq, the Company
shall cause the shares of Common Stock issuable upon exercise of this Warrant to
be duly listed or quoted thereon, as the case may be.

         1.3 NO FRACTIONAL SHARES TO BE ISSUED. The Company shall not be
required to issue fractions of shares of Common Stock upon exercise of this
Warrant. If any fraction of a share would, but for this Section, be issuable
upon any exercise of this Warrant, in lieu of such fractional share the Company
shall pay to the Holder in cash, an amount equal to the same fraction of the
current Market Price per share of outstanding Common Stock on the Business Day
immediately prior to the date of such exercise. 

         1.4 SHARE LEGEND. Each certificate for shares of Common Stock issued
upon exercise of this Warrant, unless at the time of exercise such shares are
registered under the Securities Act, shall bear the following legend:

                  THIS SECURITY HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT
         OF 1933, AS AMENDED (THE "SECURITIES ACT"), OR THE SECURITIES LAWS OF
         ANY STATE AND MAY NOT BE OFFERED, SOLD, TRANSFERRED, PLEDGED,
         HYPOTHECATED EXCEPT PURSUANT TO (I) AN EFFECTIVE REGISTRATION STATEMENT
         UNDER THE SECURITIES ACT AND ANY APPLICABLE STATE SECURITIES LAWS, (II)
         TO THE EXTENT APPLICABLE, RULE 144 UNDER THE SECURITIES ACT (OR ANY
         SIMILAR RULE UNDER THE SECURITIES ACT RELATING TO THE DISPOSITION OF
         SECURITIES), OR (III) AN OPINION OF COUNSEL, IF SUCH OPINION SHALL BE
         REASONABLY SATISFACTORY TO COUNSEL TO THE ISSUER, THAT AN EXEMPTION
         FROM REGISTRATION UNDER THE SECURITIES ACT AND APPLICABLE STATE LAW IS
         AVAILABLE.

         Any certificate issued at any time in exchange or substitution for any
certificate bearing such legend (except a new certificate issued upon completion
of a public distribution pursuant to a registration statement under the
Securities Act) shall also bear such legend unless, in the opinion of 


                                       2
<PAGE>   11

counsel selected by the holder of such certificate and reasonably acceptable to
counsel to the Company, the securities represented thereby need no longer be
subject to restrictions on resale under the Securities Act or any state
securities laws.

                                   ARTICLE II

                        WARRANT AGENT; TRANSFER, EXCHANGE
                           AND REPLACEMENT OF WARRANTS

         2.1 WARRANT AGENT. Until such time, if any, as an independent agent
shall be appointed by the Company to perform services with respect to the
Warrant described herein (the "Warrant Agent"), the Company shall perform the
obligations of the Warrant Agent provided herein at its principal office address
or such other address in the United States as the Company shall specify by prior
written notice to the Holder.

         2.2 OWNERSHIP OF WARRANT. The Company shall treat the Holder as the
holder and owner hereof for all purposes (and shall not be affected by any
notice to the contrary which shall not be effective).

         2.3 NO TRANSFER. The Holder of this Warrant, by its acceptance hereof,
covenants and agrees that such Warrant may not be sold, transferred, pledged or
hypothecated. The Common Stock issuable upon exercise hereof may not be sold,
transferred, pledged, hypothecated or otherwise disposed of unless registered
pursuant to the Securities Act or the Company shall have been supplied with an
opinion of counsel reasonably satisfactory to the Company's counsel that such
transfer is not in violation of the Securities Act and any applicable state
laws.

         2.4 DIVISION OR COMBINATION OF WARRANTS. This Warrant may be divided
(in lots exercisable for not less than 1,000 shares of Common Stock) or combined
with other Warrants upon surrender hereof. The Company shall execute and deliver
a new Warrant or Warrants in exchange for the Warrant or Warrants to be divided
or combined in accordance with such notice. 

         2.5 LOSS, THEFT, DESTRUCTION OF WARRANT CERTIFICATES. Upon receipt of
evidence satisfactory to the Company of the loss, theft, destruction or
mutilation of any Warrant and, in the case of any such loss, theft or
destruction, upon receipt of indemnity or security satisfactory to the Company,
or, in the case of any such mutilation, upon surrender and cancellation of such
Warrant, the Company, at Holder's expense, will make and deliver, in lieu of
such lost, stolen, destroyed or mutilated Warrant, a new Warrant of like tenor
and representing the right to purchase the same aggregate number of shares of
Common Stock. 

                                  ARTICLE III

                              ADJUSTMENT PROVISIONS

         3.1 ADJUSTMENTS GENERALLY. The Exercise Price and the number of shares
of Common Stock (or other securities or property) issuable upon exercise of this
Warrant shall be subject to adjustment from time to time upon the occurrence of
certain events, as provided in this Article III.

         3.2 COMMON STOCK REORGANIZATIONS AND DISTRIBUTIONS. If the Company
shall (i) subdivide its outstanding shares of Common Stock into a greater number
of shares or consolidate its outstanding shares of Common Stock into a smaller
number of shares (any such event being called a "Common Stock Reorganization")
or (ii) pay a dividend in shares of Common Stock or make a distribution in
shares of Common Stock on its outstanding shares of Common Stock, other than
pursuant

                                       3
<PAGE>   12

 to a Common Stock Reorganization (any such event being herein called a
"Common Stock Distribution"), then (A) the Exercise Price shall be adjusted,
effective immediately after the record date at which the holders of Common Stock
are determined for purposes of such Common Stock Reorganization or Common Stock
Distribution, to a price determined by multiplying the Exercise Price in effect
immediately prior to such record date by a fraction, the numerator of which
shall be the number of shares of Common Stock outstanding on such record date
before giving effect to such Common Stock Reorganization or Common Stock
Distribution and the denominator of which shall be the number of shares of
Common Stock outstanding after giving effect to such Common Stock Reorganization
or Common Stock Distribution, and (B) the number of shares of Common Stock
subject to purchase upon exercise of this Warrant shall be adjusted, effective
at such time, to a number determined by multiplying the number of shares of
Common Stock subject to purchase immediately before such Common Stock
Reorganization or Common Stock Distribution by a fraction, the numerator of
which shall be the number of shares outstanding after giving effect to such
Common Stock Reorganization or Common Stock Distribution and the denominator of
which shall be the number of shares of Common Stock outstanding immediately
before such Common Stock Reorganization or Common Stock Distribution. 

         3.3 ADJUSTMENT RULES.

         (a) Any adjustments pursuant to this Article III shall be made
successively whenever an event referred to herein shall occur.

         (b) No adjustment shall be made pursuant to this Article III in respect
of the issuance from time to time of Common Stock upon the exercise of this
Warrant.

         (c) If the Company shall set a record date to determine the holders of
Common Stock for purposes of a Common Stock Reorganization or Common Stock
Distribution and shall legally abandon such action prior to effecting such
action, then no adjustment shall be made pursuant to this Article III in respect
of such action. 

         3.4 NOTICE OF ADJUSTMENT. As promptly as practicable after any action
is taken which requires an adjustment or readjustment pursuant to this Article
III, the Company shall give notice to the Holder of such event, and, if
determinable, the required adjustment and the computation thereof. If the
required adjustment is not determinable at the time of such notice, the Company
shall give notice to the Holder of such adjustment and computation promptly
after such adjustment becomes determinable.

                                   ARTICLE IV

                              FORM S-8 REGISTRATION

         4.1 FORM S-8 REGISTRATION. As promptly as reasonably practicable after
the Closing Date, the Company will prepare and file a registration statement on
Form S-8 (or any equivalent successor form under the Securities Act) to register
the Common Stock issuable upon exercise of this Warrant.

                                    ARTICLE V

                                   DEFINITIONS

         The following terms, as used in this Warrant, have the following
respective meanings:

         "BUSINESS DAY" means each day in which banking institutions in New York
are not required or authorized by law or executive order to close.

         "CLOSING DATE" means the date hereof.

                                       4
<PAGE>   13

         "COMMON STOCK" shall have the meaning set forth in the first paragraph
of this Warrant.

         "COMMON STOCK DISTRIBUTION" shall have the meaning set forth in Section
3.2.

         "COMMON STOCK REORGANIZATION" shall have the meaning set forth in
Section 3.2.

         "COMPANY" shall have the meaning set forth in the first paragraph of
this Warrant.

         "EMPLOYMENT AGREEMENT" shall have the meaning set forth in the second
paragraph of this Warrant.

         "EXCHANGE ACT" means the Securities Exchange Act of 1934, as amended.

         "EXERCISE PRICE" shall mean $29.275 for each share of Common Stock to
be issued upon exercise of this Warrant, subject to adjustment pursuant to
Article III.

         "EXPIRATION DATE" means the third day following the date on which the
Holder ceases for any reason to be employed by Coromed; provided, however, that
if the Holder's employment with Coromed is terminated by Coromed in a manner
that constitutes "Termination for Cause" (as defined in the Holder's employment
agreement), then "Expiration Date" shall mean the date on which the Holder
ceases for any reason to be employed by Coromed.

         "HOLDER" shall have the meaning set forth in the first paragraph of
this Warrant.

         "MARKET PRICE" means, with respect to Common Stock, the average of the
daily closing prices for the Common Stock on the ten (10) consecutive trading
days before the day in question. The closing price for each day shall be the
last reported sales price regular way or, in case no such reported sale takes
place on such date, the average of the reported closing bid and asked prices
regular way, in either case on the New York Stock Exchange ("NYSE"), or if the
Common Stock is not listed or admitted to trading on the NYSE, on the principal
securities exchange on which the Common Stock is listed or admitted to trading
or Nasdaq or, if not listed or admitted to trading on any securities exchange or
Nasdaq, the closing sale price of the Common Stock, or in case no reported sale
takes place, the average of the closing bid and asked prices, on any interdealer
quotation system or any comparable system, or if the Common Stock is not so
quoted, the parties hereto agree for the purposes of this Warrant that the
current market price shall be as determined in good faith by the Board of
Directors of the Company.

         "NASDAQ" means The Nasdaq Stock Market.

         "SECURITIES ACT" means the Securities Act of 1933, as amended.

         "WARRANT AGENT" shall have the meaning set forth in Section 2.1.

                                   ARTICLE VI

                                  MISCELLANEOUS

         6.1 EXPIRATION. This Warrant shall expire and be of no further force
and effect on the Expiration Date. 

         6.2 NOTICES. Any notice or other communication to be given hereunder
shall be in writing and shall be delivered by recognized courier, telecopy or
certified mail, return receipt requested, and shall be conclusively deemed to
have been received by a party hereto and to be effective on the day on which
delivered or telecopied to such party at its address set forth below (or at such
other address as such 

                                       5
<PAGE>   14

party shall specify to the other parties hereto in writing), or, if sent by
certified mail, on the third business day after the day on which mailed,
addressed to such party at such addresses.

         In the case of a Holder, such notices and communications shall be
addressed to its address as shown on the books maintained by the Warrant Agent,
unless the Holder shall notify the Company and the Warrant Agent that notices
and communications should be sent to a different address, in which case such
notices and communications shall be sent to the address specified by the Holder,
with a copy to: Morgan, Lewis & Bockius LLP, 2000 One Logan Square,
Philadelphia, PA 19103, Attention: John F. Bales, III, Esq., Facsimile No.:
(215) 963-5299. In the case of the Company, such notices and communications
shall be addressed as follows (until notice of a change is given as provided
herein): Omnicare, Inc., 2800 Chemed Center, 255 East Fifth Street, Cincinnati,
Ohio 45202, Attention: Joel F. Gemunder, Facsimile No.: 513-762-6905, with a
copy to: Dewey Ballantine LLP, 1301 Avenue of the Americas, New York, NY 10019,
Attention: Morton A. Pierce, Esq., Facsimile No.: 212-259-6333.

         6.3 WAIVERS; AMENDMENTS. No failure or delay of the Holder in
exercising any power or right hereunder shall operate as a waiver thereof, nor
shall any single or partial exercise of such right or power, or any abandonment
or discontinuance of steps to enforce such a right or power, preclude any other
or further exercise thereof or the exercise of any other right or power. The
provisions of this Warrant may be amended, modified or waived with (and only
with) the written consent of the Company and the Holder.

         6.4 GOVERNING LAW. This Warrant shall be construed in accordance with
and governed by the laws of the State of Delaware without regard to choice of
law principles. 

         6.5 SURVIVAL OF AGREEMENTS. All covenants and agreements made by the
parties herein shall be considered to have been relied upon by each party and
shall survive the issuance and delivery of the Warrant, and shall continue in
full force and effect so long as this Warrant is outstanding.

         6.6 COVENANTS TO BIND SUCCESSOR AND ASSIGNS. All covenants,
stipulations, promises and agreements in this Warrant contained by or on behalf
of the Company shall bind its successors and assigns, whether so expressed or
not.

         6.7 SEVERABILITY. In case any one or more of the provisions contained
in this Warrant shall be invalid, illegal or unenforceable in any respect, the
validity, legality and enforceability of the remaining provisions contained
herein and therein shall not in any way be affected or impaired thereby. The
parties shall endeavor in good faith negotiations to replace the invalid,
illegal or unenforceable provisions with valid provisions the economic effect of
which comes as close as possible to that of the invalid, illegal or
unenforceable provisions. 

         6.8 SECTION HEADINGS. The section headings used herein are for
convenience of reference only, are not part of this Warrant and are not to
affect the construction of or be taken into consideration in interpreting this
Warrant.

         6.9 NO RIGHTS AS STOCKHOLDER. This Warrant shall not entitle any Holder
to any rights as a stockholder of the Company and no dividends shall be payable
or accrue in respect of this Warrant or the interest represented hereby or the
shares of Common Stock underlying this Warrant exercisable hereunder unless and
until and only to the extent this Warrant shall be exercised. 

         6.10 NO REQUIREMENT TO EXERCISE. Nothing contained in this Warrant
shall be construed as requiring the Holder to exercise this Warrant.






                                       6
<PAGE>   15


 
         IN WITNESS WHEREOF, Omnicare, Inc. has caused this Warrant to be
executed in its corporate name by one of its officers thereunto duly authorized.

                                      OMNICARE, INC.


                                       By: /s/ Cheryl D. Hodges
                                           --------------------------------
                                           Name: Cheryl D. Hodges 
                                           Title: Senior Vice President and
                                             Secretary






                                       7
<PAGE>   16


                               SUBSCRIPTION NOTICE

                    (To be executed upon exercise of Warrant)

To:  OMNICARE, INC.

         The undersigned hereby irrevocably elects to exercise the right of
purchase represented by the attached Warrant for, and to purchase thereunder,
____________ shares of Common Stock, as provided for therein, and tenders
herewith payment of the Exercise Price in full in the form of certified or bank
cashier's check or wire transfer.

         Please issue a certificate or certificates for such shares of Common
Stock in the following name or names and denominations:

 



         If said number of shares shall not be all the shares issuable upon
exercise of the attached Warrant, a new Warrant is to be issued in the name of
the undersigned for the balance remaining of such shares less any fraction of a
share paid in cash.

Dated:
                           _____________________________________________________
                           NOTE:    The above signature should correspond
                                    exactly with the name on the face of the
                                    attached Warrant.






                                       8



<PAGE>   1




                                                                    EXHIBIT 23.2

                       CONSENT OF INDEPENDENT ACCOUNTANTS

                  We hereby consent to the incorporation by reference in this
Registration Statement on Form S-8 of our report dated January 29, 1997
appearing on page 27 of Omnicare, Inc.'s Annual Report on Form 10-K/A for the
year ended December 31, 1996.

                                                        /s/ Price Waterhouse LLP

                                                        PRICE WATERHOUSE LLP

Cincinnati, Ohio.
February 5, 1998


<PAGE>   1







                                                                    EXHIBIT 23.3

                         CONSENT OF INDEPENDENT AUDITORS

We consent to the incorporation by reference in the Registration Statement Form
S-8 of Omnicare, Inc. for the registration of 280,000 shares of its common
stock of our report dated March 19, 1997, with respect to the consolidated
financial statements and schedule of American Medserve Corporation included in
its Form 10-K for the year ended December 31, 1996, filed with the Securities
and Exchange Commission.

                                                        /s/ ERNST & YOUNG L.L.P.
                                                        ERNST & YOUNG L.L.P.

Chicago, Illinios
February 5, 1998






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