Document:

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                                                                   Exhibit 10.20

                              ASSUMPTION AGREEMENT

         ASSUMPTION AGREEMENT, dated as of March 5, 2001 (the "ASSUMPTION
AGREEMENT"), between NORTEL NETWORKS CORPORATION, a corporation organized under
the laws of Canada ("NNC"), and NORTEL NETWORKS LIMITED, a corporation organized
under the laws of Canada ("NNL").

                                   WITNESSETH:

         WHEREAS, the Nortel Networks Corporation Executive Retention and
Termination Plan was adopted by the Board of Directors of NNL on August 17, 1999
with effect from September 1, 1999 (the "PLAN");

         WHEREAS, effective May 1, 2000, NNL participated in a court-approved
plan of arrangement (the "Arrangement") under the Canada Business Corporations
Act. As a result of the Arrangement, NNL and its subsidiaries became direct and
indirect subsidiaries, respectively, of NNC. In addition, the outstanding common
shares of NNL were effectively exchanged for common shares of NNC;

         WHEREAS, as a result of the Arrangement, NNC is the successor to NNL
under the Plan; and

         WHEREAS, on February 22, 2001, the Board of Directors of NNC approved,
effective May 1, 2000, the formal assumption and agreement by NNC to perform the
covenants and obligations of NNL under the Plan;

         NOW, THEREFORE, for good and valuable consideration (the receipt and
sufficiency of which is acknowledged by each of the parties), the parties hereto
agree as follows:

1.       Assumption.

         NNC agrees, effective May 1, 2000, absolutely and unconditionally to
assume and perform the covenants and obligations of NNL pursuant to the terms of
the Plan in the same manner and to the same extent as NNL would have been
required to perform such covenants and obligations if NNC had not been the
successor to NNL under the Plan.

2.       Governing Law.

         This Assumption Agreement shall be governed by, and interpreted in
accordance with, the laws of the Province of Ontario and the laws of Canada
applicable therein.

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                                     - 2 -

3.       Counterparts.

         This Assumption Agreement may be executed in one or more counterparts,
each of which shall be deemed to constitute an original.

4.       Further Assurances.

         The parties shall, from time to time, do all such acts and things and
execute and deliver all such documents as may reasonably be required to carry
out the intent of this Assumption Agreement.

         IN WITNESS WHEREOF, each of the parties has caused this Assumption
Agreement to be executed on its behalf by its officers thereunto duly
authorized, all as of the date first above written.

                                    NORTEL NETWORKS CORPORATION

                                    By:             "William J. Donovan"
                                          --------------------------------------
                                          Name:     William J. Donovan
                                          Title:    Senior Vice President,
                                                    Human Resources

                                    By:              "Deborah J. Noble"
                                          --------------------------------------
                                          Name:     Deborah J. Noble
                                          Title:    Corporate Secretary

                                    NORTEL NETWORKS LIMITED

                                    By:             "William J. Donovan"
                                          --------------------------------------
                                          Name:     William J. Donovan
                                          Title:    Senior Vice President
                                                    Human Resources

                                    By:              "Deborah J. Noble"
                                          --------------------------------------
                                          Name:     Deborah J. Noble
                                          Title:    Corporate Secretary<PAGE>   1

                                                                   EXHIBIT 10.22

                              EMPLOYMENT AGREEMENT

         This AGREEMENT is made and entered into as of the 5th day of January,
2001, by and between FIRST HORIZON PHARMACEUTICALS, INC., a Delaware corporation
(the Company") and Christopher Offen ("Executive").

                                   WITNESSETH:

         WHEREAS, the Company desires to employ the Executive, and the Executive
desires to accept such employment, upon the terms and conditions hereinafter set
forth;

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

1.       Employment. Throughout the Term (as defined in Section 2 below), the
         Company shall employ Executive as provided herein, and Executive hereby
         accepts such employment. In accepting such employment, Executive states
         that, to the best of his knowledge, he is not now, and by accepting
         such employment, will not be, under any restrictions in the performance
         of the duties contemplated under this Agreement as a result of the
         provisions of any prior employment agreement or non-compete or similar
         agreement to which Executive is or was a party.

2.       Term of Employment. Subject to approval of this Agreement by the
         Company's Board of Directors, the term of Executive's employment by the
         Company hereunder shall commence on January 5, 2001 (the "Effective
         Date") and shall continue thereafter unless sooner terminated as a
         result of Executive's death or in accordance with the provisions of
         Section 7 below (the "Term").

3.       Duties. Throughout the Term, and except as otherwise expressly provided
         herein, Executive shall be employed by the Company as the Chief
         Commercial Officer of the Company. In such capacity, Executive shall be
         responsible for directing the Company's activities as they relate to
         sales, marketing, trade relations and managed care. Executive shall
         devote his full time to the performance of his duties as Chief
         Commercial Officer of the Company in accordance with the Company's
         By-laws, this Agreement and the directions of the Company's Board of
         Directors. Without limiting the generality of the foregoing, throughout
         the Term Executive shall faithfully perform his duties as Chief
         Commercial Officer at all times so as to promote the best interests of
         the Company. In addition, upon approval of this Agreement, the Board of
         Directors shall elect Executive as an officer of the Company at its
         first board meeting after the Effective Date.

4.       Compensation.

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         (a)      Salary. For any and all services performed by Executive under
                  this Agreement during the Term, in whatever capacity, the
                  Company shall pay to Executive an annual salary of One Hundred
                  Fifty Thousand Dollars ($150,000.00) per year (the "Salary")
                  less any and all applicable federal, state and local payroll
                  and withholding taxes. The Salary shall be paid in the same
                  increments as the Company's normal payroll, but no less
                  frequent than bi-monthly and prorated, however, for any period
                  of less than a full month. The Salary will be reviewed
                  annually by the Compensation Committee of the Board and a
                  determination shall be made at that time as to the
                  appropriateness of an increase, if any, thereto.

         (b)      Bonus. In addition to the Salary, Executive shall be eligible
                  to receive from the Company an incentive compensation bonus
                  (the "Bonus") based on a percentage of his Salary. The Bonus,
                  if any, shall be determined based on the achievement by the
                  Company and/or Executive of certain specific strategic plans
                  and goals (the "Performance Goals") during the preceding
                  calendar year (the "Measurement Period") as shall be
                  determined by the Board in consultation with the Executive.
                  The initial Performance Goals will be established by the Board
                  within ninety (90) days of Executive's employment hereunder.
                  Thereafter, the Performance Goals for each Measurement Period
                  shall be established as promptly as possible in each such
                  Measurement Period. Following each Measurement Period, the
                  Compensation Committee of the Board shall review the
                  Performance Goals for the prior Measurement Period in light of
                  the Company's and/or Executive's actual performance during
                  such Measurement Period as reflected on the Company's audited
                  financial statements. Achievement of various levels of the
                  Performance Goals shall result in the following payments as a
                  percentage of Salary:

<TABLE>
<CAPTION>
                            Level of Achievement     Bonus as Percent of Salary
                            --------------------     --------------------------
                            <S>                      <C>
                            Below Threshold                          10%
                            Threshold Goal                           15%
                            Target Goal                              25%
                            Stretch Goal                             50%
</TABLE>

                           Payment of each year's Bonus, if any, shall be made
                  within thirty (30) days after the Company's and/or Executive's
                  performance for the Measurement Period is established by the
                  Compensation Committee on the basis of the Company's audited
                  financial statements. In addition, and at its sole discretion,
                  the Board may award additional compensation to Executive based
                  on Executive's contributions to the Company.

5.       Benefits and Other Rights. In consideration for Executive's performance
         under this Agreement, the Company shall provide to Executive the
         following benefits:

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         (a)      The Company will provide Executive with cash advances for or
                  reimbursement of all reasonable out-of-pocket business
                  expenses incurred by Executive in connection with his
                  employment hereunder. Such reimbursement, however, is
                  conditioned upon Executive adhering to any and all reasonable
                  policies established by Company from time to time with respect
                  to such reimbursements or advances, including, but not limited
                  to, a requirement that Executive submit supporting evidence of
                  any such expenses to the Company.

         (b)      A company car, gasoline charge card and car maintenance plan
                  will be provided to Executive and paid for by the Company
                  during the term.

         (c)      The Company will provide Executive and his family with the
                  opportunity to receive group medical coverage under the terms
                  of the Company's health insurance plan, but subject to
                  completion of normal waiting periods. During any such waiting
                  period, the Company will pay, or reimburse Executive for, the
                  cost of COBRA coverage for Executive and his family under his
                  prior health plan.

         (d)      During the Term the Executive shall be entitled to ten (10)
                  days paid vacation, it being understood and agreed that unused
                  vacation shall not be carried over from one year to the next.
                  In addition, Executive shall be entitled to eight (8) paid
                  holidays and four (4) paid personal days off.

6.       Options. As of the Effective Date, the Company will grant to the
         Executive 60,000 options pursuant to the Company's 1997 Non Qualified
         Stock Option Plan (the "Option Plan"). The options shall vest at the
         rate of 15,000 options per year on each of the first four anniversaries
         of the Effective Date with an exercise price equal to the average of
         the high and low share price as of the date of grant. Such options
         shall provide that upon a "Change of Control" (as herein defined) all
         such options shall become fully vested and immediately exercisable. For
         purposes of this Agreement, a Change of Control shall mean the
         occurrence of any of the following events: (a) a merger, consolidation
         or reorganization of the Company in which the Company does not survive
         as an independent entity; (b) a sale of all or substantially all of
         tile assets of the Company; (c) the first purchase of shares of common
         stock of the Company pursuant to a tender or exchange offer for more
         than a majority of the Company's outstanding shares of common stock by
         any person other than John N. Kapoor or an entity affiliated with or
         controlled by John N. Kapoor; or (d) any change of control of a nature
         that would, in the opinion of the Board of Directors, be required to be
         reported under the federal securities laws, provided that such a change
         of control shall be deemed to have occurred if (i) any person, other
         than John N. Kapoor or an entity affiliated with or controlled by John
         N. Kapoor, is or becomes the beneficial owner, directly or indirectly,
         of securities of the Company representing at least a majority of the
         combined voting power of the Company's then outstanding securities; or
         (ii) during any period of two consecutive years, individuals who at the
         beginning of such period constitute the Board of Directors of the
         Company

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         cease for any reason to constitute a majority thereof unless the
         election of any director, who was not a director at the beginning of
         the period, was approved by a vote of at least 80% of the directors
         then still in office who were directors at the beginning of the period.

7.       Termination of the Term.

         (a)      The Company shall have the right to terminate the Term under
                  the following circumstances:

                  (i)      Executive shall die; or

                  (ii)     With or without Cause, effective upon written notice
                           to Executive by the Company.

         (b)      This Agreement may be terminated by the Executive at any time
                  upon sixty (60) days prior written notice to the Company.

         (c)      For purposes of this Agreement, "Cause" shall mean:

                  (i)      Executive shall be convicted of the commission of a
                           felony or a crime involving dishonesty, fraud or
                           moral turpitude;

                  (ii)     Executive has engaged in acts of fraud, embezzlement,
                           theft or other dishonest acts against the Company;

                  (iii)    Executive commits an act which negatively impacts the
                           Company or its employees including, but not limited
                           to, engaging in competition with the Company,
                           disclosing confidential information or engaging in
                           sexual harassment, discrimination or other human
                           rights-type violations;

                  (iv)     Executive's gross neglect or willful misconduct in
                           the discharge of his duties and responsibilities; or

                  (v)      Executive's repeated refusal to follow the lawful
                           direction of the Board of Directors or supervising
                           officers.

8.       Effect of Expiration or Termination of the Term. Promptly following the
         termination of the Term, and except as otherwise expressly agreed to by
         the Company in writing, Executive shall

         (a)      Immediately resign from any and all other positions or
                  committees which Executive holds or is a member of with the
                  Company or any subsidiary of the Company including, but not
                  limited to, as an officer and director of the Company or any
                  subsidiary of the Company.

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         (b)      provide the Company with all reasonable assistance necessary
                  to permit the Company to continue its business operations
                  without interruption and in a manner consistent with
                  reasonable business practices; provided, however, that such
                  transition period shall not exceed thirty (30) days after
                  termination nor require more than twenty (20) hours of
                  Executive's time per week and Executive shall be promptly
                  reimbursed for all out-of-pocket Expenses.

         (c)      deliver to the Company possession of any and all property
                  owned or leased by the Company which may then be in
                  Executive's possession or under his control, including,
                  without limitation, any and all such keys, credit cards,
                  automobiles, equipment, supplies, books, records, files,
                  computer equipment, computer software and other such tangible
                  and intangible property of any description whatsoever. If,
                  following the expiration or termination of the Term, Executive
                  shall receive any mail addressed to the Company, then
                  Executive shall immediately deliver such mail, unopened and in
                  its original envelope or package, to the Company; and

         (d)      Other than as provided in this Section 8, upon a termination
                  of employment all other benefits and/or entitlements to
                  participate in programs or benefits, if any, will cease as of
                  the effective date except medical insurance coverage that may
                  be continued at Executive's own expense as provided by
                  applicable law or written Company policy.

         (e)      Upon termination of Executive pursuant to ss. 7(a)(i) or ss.
                  7(a)(ii) without Cause, the Company shall (i) provide
                  Executive with Salary continuance, subject to ss. 8(g), for
                  nine (9) months (a "Salary Continuance"), plus (ii) a lump sum
                  payment equal to seventy-five (75)% percent of the Bonus, if
                  any, paid to Executive for the immediately preceding calendar
                  year, plus (iii) provide nine (9) months of COBRA coverage for
                  Executive which shall be substantially equivalent to that
                  provided by the Company prior to termination, plus (iv)
                  provide nine (9) months of car allowance at seven hundred
                  fifty dollars ($750.00) per month, subject to return of
                  existing company vehicle at time of termination, plus (v) all
                  of Executive's then unvested options previously issued
                  pursuant to the Company Option Plan shall immediately vest and
                  be exercisable as herein provided.

         (f)      Upon termination of Executive pursuant to ss.7(a)(ii) with
                  Cause or ss.7(b), the Company shall pay Executive or
                  Executive's estate all Salary accrued but unpaid as of the
                  date of such termination.

         (g)      In the event that Executive shall be entitled to receive a
                  Salary Continuance and COBRA benefit pursuant to ss. 8(e),
                  such Salary Continuance and COBRA benefit shall continue only
                  until such time as Executive shall have accepted another full
                  time position. In addition, in the event that Executive shall
                  perform consulting or other services for which

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                  he shall receive compensation, all compensation shall be
                  reported to the Company and shall be offset against any
                  remaining Salary Continuance payments, Failure of Executive to
                  promptly report the receipt of any compensation from a third
                  party or the acceptance of a new position shall entitle the
                  Company to terminate all remaining Salary Continuance and
                  COBRA benefits and to seek restitution for any payments made
                  to Executive subsequent to such job acceptance or compensation
                  receipt;

         (h)      Upon the expiration or termination of this Agreement for any
                  reason, Executive, or Executive's estate, will have a period
                  of 90 days from the date of such expiration or termination in
                  which to exercise any vested option.

         (i)      Any dollar amounts which are to be paid at the time of
                  termination under this Section 8, other than Salary
                  Continuance, the car allowance and COBRA payments, shall be
                  paid within thirty (30) days after the date of termination.
                  Any Salary Continuance or COBRA payments shall be made in
                  accordance with the usual payroll practices which were
                  applicable prior to termination. Any and all payments made
                  pursuant to this Agreement shall be net of any and all
                  applicable federal, state and local payroll and withholding
                  taxes.

9.       Restrictive Covenants for Executive. Executive hereby covenants and
         agrees with the Company that for so long as Executive is employed by
         the Company and for a period (the "Restricted Period") of thirty-six
         (36) months thereafter, Executive shall not, without the prior written
         consent of the Company, which consent shall be within the sole and
         exclusive discretion of the Company, either directly or indirectly, on
         his own account or as an executive, consultant, agent, partner, joint
         venturer, owner, officer, director or shareholder of any other person,
         firm, corporation, partnership, limited liability company or other
         entity, or in any other capacity, in any way:

         (a)      Carry on, be engaged in or have any financial interest in any
                  business which is in competition with the business of the
                  Company. For purposes of this Section 9, a business shall be
                  deemed to be in competition with the Company if it involves
                  research and development work involving products, including,
                  but not limited to, generic drug products, which were, at the
                  time of termination, being marketed by the Company or which at
                  such time were under study by the Company and expected to be
                  marketed within six (6) months of the date of termination.
                  Nothing in this Section 9 shall be construed so as to preclude
                  Executive from investing in any publicly held company,
                  provided Executive's beneficial ownership of any class of such
                  company's securities does not exceed 5% of the outstanding
                  securities of such class,

         (b)      solicit any current supplier, customer or client of the
                  Company or any affiliate of the Company or anyone who was a
                  supplier, customer or client

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                  at any time during the twelve (12) month period immediately
                  preceding termination, excluding customers such as
                  wholesalers, managed care agencies, shippers, commercial and
                  investment banks, IR/PR agencies, scientific and computer
                  consultants, lawyers and manufacturers; as long as
                  manufacturers have extra capacity, provided, however, that
                  where minimum alternative allocation sources would not be
                  available, requests for exceptions to this restriction will be
                  determined by the Company on a case by case basis; or

         (c)      solicit, employ or engage any person who was an employee of
                  the Company or any affiliate of the Company at any time during
                  the twelve (12) month period immediately preceding
                  termination.

10.      Confidentiality, The Executive acknowledges that during the period of
         his employment by the Company, and in his performance of services
         hereunder, he will be placed in a relationship of trust and confidence
         regarding the Company and its affairs. In the course of and due to that
         relationship he will have contact with the Company's customers,
         suppliers, affiliates, and distributors and their personnel. In the
         course of the aforesaid relationship, he will have access to and will
         acquire confidential information relating to the business and
         operations of the Company, including, without limitation, information
         relating to processes, plans and methods of operation of the Company.
         The Executive acknowledges that any such information that is not a
         trade secret, nonetheless constitutes confidential information as
         between himself and the Company, that the disclosure thereof (or of any
         information which he knows relates to confidential, trade, or other
         secret aspects of the Company's business) would cause substantial loss
         to the goodwill of the Company, and will continue to be made known to
         Executive only because of the position of trust and confidence which he
         will continue to occupy hereunder. In view of the foregoing, and in
         consideration of the covenants and premises of this Agreement, the
         Executive agrees that he will not, at any time during the term of his
         employment, and for a period of twelve (12) months thereafter, disclose
         to any person, firm or company any trade secrets or confidential
         information or such ideas which he may have acquired or developed or
         may acquire or develop relating to the business of the Company while
         serving the Company.

11.      Remedies.

         (a)      The covenants of Executive set forth in Sections 9 and 10 are
                  separate and independent covenants for which valuable
                  consideration has been paid, the receipt, adequacy and
                  sufficiency of which are acknowledged by Executive, and have
                  also been made by Executive to induce the Company to enter
                  into this Agreement. Each of the aforesaid covenants may be
                  availed of, or relied upon, by the Company in any court of
                  competent jurisdiction, and shall form the basis of injunctive
                  relief and

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                  damages including expenses of litigation (including, but not
                  limited to, reasonable attorney's fees upon trial and appeal)
                  suffered by the Company arising out of any breach of the
                  aforesaid covenants by Executive. The covenants of Executive
                  set forth in this Section 11 are cumulative to each other and
                  to all other covenants of Executive in favor of the Company
                  contained in this Agreement and shall survive the termination
                  of this Agreement for the purposes intended.

         (b)      Each of the covenants contained in Sections 9 and 10 above
                  shall be construed as agreements which are independent of any
                  other provision of this Agreement, and the existence of any
                  claim or cause of action by any party hereto against any other
                  party hereto, of whatever nature, shall not constitute a
                  defense to the enforcement of such covenants. If any of such
                  covenants shall be deemed unenforceable by virtue of its scope
                  in terms of geographical area, length of time or otherwise,
                  but may be made enforceable by the imposition of limitations
                  thereon, Executive agrees that the same shall be enforceable
                  to the fullest extent permissible under the laws and public
                  policies of the jurisdiction in which enforcement is sought.
                  The parties hereto hereby authorize any court of competent
                  jurisdiction to modify or reduce the scope of such covenants
                  to the extent necessary to make such covenants enforceable.

         (c)      In the event that Executive believes that the Company is in
                  violation of a material obligation owed to Executive under
                  this Agreement, and the Executive has given notice of such
                  violation to the Company requesting that the Company cure such
                  violation, and within twenty (20) business days the Company
                  has not undertaken steps to cure such violation or to provide
                  information to Executive demonstrating that the Company is not
                  in violation of the Agreement, and as a result of such failure
                  to cure or dispute such violation, the Executive terminates
                  the Agreement in accordance with Section 7(b), Executive shall
                  not be barred from seeking employment with a competitor
                  notwithstanding the restriction of Section 8(a); provided,
                  however, that all other restrictions contained in this
                  Agreement, including, but not limited to, the covenants in
                  Section 8(b) and in Section 9, shall remain in full force and
                  effect.

12.      Enforcement Costs. If any legal action or other proceeding is brought
         for the enforcement of this Agreement, or because of an alleged
         dispute, breach, default or misrepresentation in connection with any
         provisions of this Agreement, the successful or prevailing party or
         parties shall be entitled to recover reasonable attorney's fees, court
         costs and all expenses even if not taxable as court costs (including,
         without limitation, all such fees, costs and expenses incident to
         appeal and other postjudgment proceedings), incurred in that action or
         proceeding, in addition to any other relief to which such party or
         parties may be entitled. Attorneys fees shall include, without
         limitation, paralegal fees,

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         investigative fees, administrative costs, sales and use taxes and all
         other charges billed by the attorney to the prevailing party.

13.      Notices. Any and all notices necessary or desirable to be served
         hereunder shall be in writing and shall be

         (a)      personally delivered, or

         (b)      sent by certified mail, postage prepaid, return receipt
                  requested, or guaranteed overnight delivery by a nationally
                  recognized express delivery company, in each case addressed to
                  the intended recipient at the address set forth below.

         (c)      For notices sent to the Company:

                           First Horizon Pharmaceuticals, Inc.
                           660 Hembree Parkway, Suite 106
                           Roswell, Georgia 30076
                           Telephone No.: (770) 442-9707
                           Facsimile No.: (770) 442-9594

         (d)      For notices sent to Executive:

                           Christopher Offen
                           4286 Highborne Dr.
                           Marietta, GA  30066

         Either party hereto may amend the addresses for notices to such party
hereunder by delivery of a written notice thereof served upon the other party
hereto as provided herein. Any notice sent by certified mail as provided above
shall be deemed delivered on the third (3rd) business day next following the
postmark date which it bears.

14.      Entire Agreement. This Agreement sets forth the entire agreement of the
         parties hereto with respect to the subject matter hereof, and all prior
         negotiations, agreements and understandings are merged herein. This
         Agreement may not be modified or revised except pursuant to a written
         instrument signed by the party against whom enforcement is sought.

15.      Severability. The invalidity or unenforceability of any provision
         hereof shall not affect the enforceability of any other provision
         hereof, and except as otherwise provided in Section 11 above, any such
         invalid or unenforceable provision shall be severed from this
         Agreement.

16.      Waiver. Failure to insist upon strict compliance with any of the terms
         or conditions hereof shall not be deemed a waiver of such term or
         condition, and the waiver or relinquishment of any right or remedy
         hereunder at any one or

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         more times shall not be deemed a waiver or relinquishment of such right
         or remedy at any other time or times.

17.      Arbitration. Any claims, disputes or controversies arising out of or
         relating to this Agreement between the parties (other than those
         arising under Section 11) shall be submitted to arbitration by the
         parties. The arbitration shall be conducted in Atlanta, Georgia in
         accordance with the rules of the American Arbitration Association then
         in existence and the following provisions: Either party may serve upon
         the other party by guaranteed overnight delivery by a nationally
         recognized express delivery service, written demand that the dispute,
         specifying in detail its nature, be submitted to arbitration. Within
         seven business days after the service of such demand, each of the
         parties shall appoint an arbitrator and serve written notice by
         guaranteed overnight delivery by a nationally recognized express
         delivery service, of such appointment upon the other party. The two
         arbitrators appointed shall appoint a third arbitrator. The decision of
         two arbitrators in writing under oath shall be final and binding upon
         the parties. The arbitrators shall decide who is to pay the expenses of
         the arbitration. If the two arbitrators appointed fail to agree upon a
         third arbitrator within ten days after their appointment, then an
         application may be made by either party, upon notice to the other
         party, to any court of competent jurisdiction for the appointment of a
         third arbitrator, and any such appointment shall be binding upon both
         parties.

18.      Governing Law. This Agreement and the rights and obligations of the
         parties hereto shall be governed by and construed in accordance with
         the law of the State of Georgia, without regard to its conflicts of
         laws provisions. Each party hereto hereby (a) agrees that any
         litigation which may be initiated with respect to this Agreement or to
         enforce rights granted hereunder shall be initiated in a court located
         in Fulton County, Georgia and (b) consents to personal jurisdiction of
         such courts for such purpose.

19.      Benefit and Assignability. This Agreement shall inure to the benefit of
         and be binding upon the Company and its successors and assigns. The
         rights and obligations of Executive hereunder are personal to him, and
         are not subject to voluntary or involuntary alienation, transfer,
         delegation or assignment.

                            [SIGNATURE PAGE FOLLOWS]

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         IN WITNESS WHEREOF, the parties hereto have executed this Employment
Agreement as of the day and year first above written.

                              EXECUTIVE:

                              /s/Christopher Offen
                              ------------------------------------------
                              Christopher Offen

                              and

                              FIRST HORIZON PHARMACEUTICALS, INC.
                              Accepted By

                              By: /s/ Mahendra G. Shah
                                 ---------------------------------------

                              Its:     Chairman and CEO
                                 ---------------------------------------

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