Exhibit 10.8

EMPLOYMENT AGREEMENT

THIS EMPLOYMENT AGREEMENT (the "Agreement"), made this 14th day of May 2008 (the "Effective Date"), is entered
into by Sepracor Inc., a Delaware corporation with its principal place of business at 84 Waterford Drive, Marlborough, Massachusetts 01752-7231(the "Company"), and
Mark H. N. Corrigan, residing at 389 Marlborough Street, Boston, MA 02115 (the "Executive").

WHEREAS,
the Company desires to continue to employ the Executive and the Executive desires to continue to be employed by the Company; and

WHEREAS,
the Company has determined that appropriate steps should be taken to reinforce and encourage the continued employment of the Executive.

NOW
THEREFORE, in consideration of the mutual covenants and promises contained herein, and other good and valuable consideration, the receipt and sufficiency of which are hereby
acknowledged by the parties hereto, the parties agree as follows:

1.Term of Employment.The Company hereby agrees to continue to employ the Executive and the Executive hereby
agrees to continue to be employed by the Company, upon the terms set forth in this Agreement, until the fifth anniversary of the Effective Date (the "Term"). Notwithstanding the foregoing, the Term
shall be extended automatically without further action by either party by one (1) additional year (added to the end of the Term) on each succeeding anniversary of the Effective Date, unless
either party shall have served written notice upon the other party at least sixty (60) days preceding the date upon which such Term would end (such period, as it may be extended, the
"Employment Period"), unless sooner terminated in accordance with the provisions of Section 4.

2.Title and Capacity.The Executive shall serve as Executive Vice-President, Research and
Development of the Company. Executive shall report directly to the Chief Executive Officer of the Company and shall, except as permitted hereby, devote all of his business time and services to the
business and affairs of the Company. Executive shall also perform such other duties consistent with his position as Executive Vice-President, Research and Development as may be reasonably
assigned by the Chief Executive Officer and the Board of Directors of the Company (the "Board") from time to time. The Executive agrees to abide by the rules, regulations, instructions, personnel
practices and policies of the Company and any changes therein that may be adopted from time to time by the Company.

Notwithstanding
anything herein to the contrary, Executive shall be entitled to engage in (a) service on the board of directors of two companies, business or trade organizations
with prior Board approval, (b) service on the board of directors of not-for-profit or charitable organizations with prior Board approval, (c) other charitable
activities and community affairs and (d) managing his personal investments and affairs, in each case to the extent such activities do not materially interfere with the performance of his duties
and responsibilities to the Company.

3.Compensation and Benefits.



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4.Employment Termination.The employment of the Executive under this Agreement shall terminate upon the
occurrence of any of the following:



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5.Effect of Termination.



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6.Non-Competition and Non-Solicitation.



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7.Proprietary Information and Developments.



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8.Indemnification.The Company shall indemnify the Executive in accordance with its Certificate of
Incorporation and By-Laws.

9.Survival.The provisions of Sections 6, 7 and 8 shall survive the termination of this Agreement for
any reason.

10.Notices.Any notices delivered under this Agreement shall be deemed duly delivered three (3) business
days after it is sent by registered or certified mail, return receipt requested, postage prepaid, or one (1) business day after it is sent for next-business day delivery via a
reputable nationwide overnight courier service, in each case to the address of the recipient set forth in the introductory paragraph hereto. Either party may change the address to which notices are to
be delivered by giving notice of such change to the other party in the manner set forth in this Section 10.

11.Compliance with Code Section 409A.This Agreement is intended to comply with the provisions of
Section 409A and the Agreement shall, to the extent practicable, be construed in accordance therewith. The Company makes no representation or warranty and shall have no liability to the
Executive or any other person if any provisions of this Agreement are determined to constitute deferred compensation subject to Section 409A and do not satisfy an exemption from, or the
conditions of, Section 409A.

12.Pronouns.Whenever the context may require, any pronouns used in this Agreement shall include the
corresponding masculine, feminine or neuter forms, and the singular forms of nouns and pronouns shall include the plural, and vice versa.

13.Entire Agreement.This Agreement, together with the ERA, constitutes the entire agreement between the
parties and supersedes all prior agreements and understandings, whether written or oral, relating to the subject matter of this Agreement, including the letter agreement between the Company and the
Executive dated March 11, 2003.

14.Amendment.This Agreement may be amended or modified only by a written instrument executed by both the
Company and the Executive.

15.Governing Law.This Agreement shall be governed by and construed in accordance with the laws of the
Commonwealth of Massachusetts (without reference to the conflict of laws provisions thereof). Any action, suit or other legal proceeding arising under or relating to any provision of this Agreement
shall be commenced only in a court of the Commonwealth of Massachusetts (or, if appropriate, a federal court located within the Commonwealth of Massachusetts), and the Company and the Executive each
consents to the jurisdiction of such a court. The Company and the Executive each hereby irrevocably waive any right to a trial by jury in any action, suit or other legal proceeding arising under or
relating to any provision of this Agreement or any other dealing between them relating to the subject matter of this transaction and the relationship that is being established.

16.Successors and Assigns.This Agreement shall be binding upon and inure to the benefit of both parties and
their respective successors and assigns, including any corporation with which or into

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the Company may be merged or which may succeed to its assets or business;provided,however, that
the obligations of the Executive are personal and shall not be assigned by him.

17.Acknowledgment.The Executive states and represents that he has had an opportunity to fully discuss and
review the terms of this Agreement with an attorney. The Executive further states and represents that he has carefully read this Agreement, understands the contents herein, freely and voluntarily
assents to all of the terms and conditions hereof, and signs his name of his own free act.

18.Miscellaneous.



IN
WITNESS WHEREOF, the parties hereto have executed this Agreement as of the day and year set forth above.

| |  |                                           |  |                  
| |  | ----------------------------------------- |  | -----------------
| |  | Sepracor Inc.                            
| |  | By:                                       |  | /s/ADRIAN ADAMS  
| |  | Title:                                    |  | President and CEO
| |  | /s/MARK H. N. CORRIGANMark H. N. Corrigan

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SCHEDULE A        VACATION POLICY

SEE ATTACHED POLICY

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SCHEDULE B        FORM OF SEPARATION AGREEMENT AND RELEASE OF CLAIMS

In connection with your separation fromSepracor Inc.(the "Company") on
[            ], and in order to receive the benefits as set forth in the Employment Agreement (the "Agreement") between you and the Company dated
[            ], 2008, this agreement must become binding between you and the Company. By signing and returning this agreement, you will be entering into a binding agreement
with the Company and will be agreeing to the terms and conditions set forth in the numbered paragraphs below, including the release of claims set forth in paragraph 1. Therefore, you are
advised to consult with an attorney before signing this agreement and you have been given more than twenty-one (21) days to do so. If you sign this agreement, you may change your
mind and revoke your agreement during the seven (7) day period after you have signed it. If you do not so revoke, this agreement will become a binding agreement between you and the Company upon
the expiration of the seven (7) day revocation period.

The
following numbered paragraphs set forth the terms and conditions which will apply if you timely sign and return this agreement and do not revoke it within the seven (7) day
revocation period:

1.ReleaseIn consideration of the payment of the severance benefits, which you acknowledge you would not
otherwise be entitled to receive, you hereby fully, forever, irrevocably and unconditionally release, remise and discharge the Company, its officers, directors, stockholders, corporate affiliates,
subsidiaries, parent companies, successors and assigns, agents and employees (each in their individual and corporate capacities) (hereinafter, the "Released Parties") from any and all claims, charges,
complaints, demands, actions, causes of action, suits, rights, debts, sums of money, costs, accounts, reckonings, covenants, contracts, agreements, promises, doings, omissions, damages, executions,
obligations, liabilities, and expenses (including attorneys' fees and costs), of every kind and nature which you ever had or now have against the Released Parties, including, but not limited to, those
claims arising out of your employment with and/or separation from the Company, including, but not limited to, all claims under Title VII of the Civil Rights Act of 1964, 42 U.S.C.
§ 2000eet seq., the Age Discrimination in Employment Act, 29 U.S.C. § 621et
seq., the Americans With Disabilities Act of 1990, 42 U.S.C. § 12101et seq., the Family and Medical Leave
Act, 29 U.S.C. § 2601et seq., the Worker Adjustment and Retraining Notification Act ("WARN"), 29 U.S.C. § 2101 et seq.,
Section 806 of the Corporate and Criminal Fraud Accountability Act of 2002, 18 U.S.C. § 1514(A), the Rehabilitation
Act of 1973, 29 U.S.C. § 701et seq., Executive Order 11246, Executive Order 11141, the Fair Credit Reporting Act, 15 U.S.C.
§ 1681et seq., the Employee Retirement Income Security Act of 1974 ("ERISA"), 29 U.S.C. § 1001 et seq., the Massachusetts Fair
Employment Practices Act., M.G.L. c. 151B, § 1et
seq., the Massachusetts Civil Rights Act, M.G.L. c. 12, §§ 11H and 11I, the Massachusetts Equal Rights Act, M.G.L. c. 93,
§ 102 and M.G.L. c. 214, § 1C, the Massachusetts Labor and Industries Act, M.G.L. c. 149, § 1et
seq., the Massachusetts Privacy Act, M.G.L. c. 214, § 1B, and the Massachusetts Maternity Leave Act, M.G.L. c. 149, § 105D,
all as amended; all common law claims including, but not limited to, actions in tort, defamation and breach of contract; all claims to any non-vested ownership interest in the Company,
contractual or otherwise, including, but not limited to, claims to stock or stock options; and any claim or damage arising out of your employment with or separation from the Company (including a claim
for retaliation) under any common law theory or any federal, state or local statute or ordinance not expressly referenced above. Notwithstanding the foregoing, the release set forth in this
Section 1 shall not apply to (a) your rights under the Agreement, (b) any vested equity interest in the Company, including vested stock options or (c) the rights you have
to be indemnified and defended by the Company pursuant to the terms of the Company's Restated Certificate of Incorporation, as amended, or other organizing documents, and the rights that you have
under, or with respect to, the Company's Directors and Officers liability insurance policies with respect to conduct or events occurring during, or relating to, your employment by, or while serving as
an officer or director of, the Company, Without limiting the generality of the foregoing, the Company shall continue to cover you under its Directors and Officers liability insurance policies
following the

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Separation
Date in substantially the same amount and on substantially the same terms as the Company covers its other former officers and directors.

2.On-Going ObligationsYou acknowledge and reaffirm your obligation to keep confidential and not to
disclose any and all non-public information concerning the Company which you acquired during the course of your employment with the Company, including, but not limited to, any
non-public information concerning the Company's business affairs, business prospects and financial condition, as is stated more fully in the Non-Disclosure and Invention
Agreement, which you executed during or prior to your employment with the Company (the "Non-Disclosure Agreement"). You further acknowledge and reaffirm your obligations under the
Agreement for the benefit of the Company.

3.Return of Company PropertyYou confirm that you have returned to the Company all keys,
files, records (and copies thereof), equipment (including, but not limited to, computer hardware, software and printers, wireless handheld devices, cellular phones, pagers, etc.), Company
identification, Company vehicles and any other Company owned property in your possession or control and have left intact all electronic Company documents, including but not limited to, those that you
developed or helped develop during your employment. You further confirm that you have cancelled all accounts for your benefit, if any, in the Company's name, including but not limited to, credit
cards, telephone charge cards, cellular phone and/or pager accounts and computer accounts.

4.Business Expenses and CompensationYou acknowledge that you have been reimbursed by the Company for all
business expenses incurred in conjunction with your employment with the Company and that no other reimbursements are owed to you. You further acknowledge that you have received payment in full for all
services rendered in conjunction with your employment by the Company and that no other compensation is owed to you except as provided in the Agreement.

5.Non-DisparagementYou understand and agree that, as a condition for payment to you of the
consideration herein described and described in the Agreement, you shall not make any false, disparaging or derogatory statements to any media outlet, industry group, financial institution or current
or former employee, consultant, client or customer of the Company regarding the Company or any of its directors, officers, employees, agents or representatives or about the Company's business affairs
and financial condition;provided,however, that nothing herein shall prevent you from making truthful
disclosures to any governmental entity or in any litigation or arbitration. The Company agrees not to make any false, disparaging or derogatory statements about you to any media outlet, industry
group, financial institution, or current or former employee, consultant, client, or customer;provided, however, that nothing herein shall prevent the
Company from making truthful disclosures to any governmental entity or in any litigation or arbitration.
In the event that any inquiries are directed to the Company's Human Resources Office regarding you from prospective employers, the Company will explain its neutral reference policy, confirm only the
fact of your former employment with the Company, starting and ending dates, and your job title in the last position held.

6.AmendmentThis agreement shall be binding upon the parties and may not be modified in any manner, except by an
instrument in writing of concurrent or subsequent date signed by duly authorized representatives of the parties hereto. This agreement is binding upon and shall inure to the benefit of the parties and
their respective agents, assigns, heirs, executors, successors and administrators.

7.Waiver of RightsNo delay or omission by the Company or you in exercising any right under this agreement shall
operate as a waiver of that or any other right. A waiver or consent given by the Company or you on any one occasion shall be effective only in that instance and shall not be construed as a bar or
waiver of any right on any other occasion.

8.ValidityShould any provision of this agreement be declared or be determined by any court of competent
jurisdiction to be illegal or invalid, the validity of the remaining parts, terms or provisions shall not be affected thereby and said illegal or invalid part, term or provision shall be deemed not to
be a part of this agreement.

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9.Tax ProvisionIn connection with the severance benefits provided to you pursuant to this agreement and the
Agreement, the Company shall withhold and remit to the tax authorities the amounts required under applicable law, and you shall be responsible for all applicable taxes with respect to such severance
benefits under applicable law. You acknowledge that you are not relying upon advice or representation of the Company with respect to the tax treatment of any of the severance benefits.

10.Nature of AgreementYou understand and agree that this agreement, together with the Agreement, is a severance
agreement and does not constitute an admission of liability or wrongdoing on the part of the Company.

11.AcknowledgmentsYou acknowledge that you have been given at least twenty-one (21) days to
consider this agreement and that the Company advised you to consult with an attorney of your own choosing prior to signing this agreement. You understand that you may revoke this agreement for a
period of seven (7) days after you sign this agreement, and the agreement shall not be effective or enforceable until the expiration of this seven (7) day revocation period. You understand and agree that by entering
into this agreement you are waiving any and all rights or claims you might have under The Age Discrimination in Employment Act, as
amended by The Older Workers Benefit Protection Act, and that you have received consideration beyond that to which you were previously entitled.

12.Voluntary AssentYou affirm that, other than as contained in the Agreement, no other promises or agreements
of any kind have been made to or with you by any person or entity whatsoever to cause you to sign this agreement, and that you fully understand the meaning and intent of this agreement. You state and
represent that you have had an opportunity to fully discuss and review the terms of this agreement with an attorney. You further state and represent that you have carefully read this agreement,
understand the contents herein, freely and voluntarily assent to all of the terms and conditions hereof, and sign your name of your own free act.

13.Applicable LawThis agreement shall be interpreted and construed by the laws of the Commonwealth of
Massachusetts, without regard to conflict of laws provisions. You hereby irrevocably submit to and acknowledge and recognize the jurisdiction of the courts of the Commonwealth of Massachusetts, or if
appropriate, a federal court located in Massachusetts (which courts, for purposes of this agreement, are the only courts of competent jurisdiction), over any suit, action or other proceeding arising
out of, under or in connection with this agreement or the subject matter hereof.

14.Entire AgreementThis agreement, together with the Agreement, contains and constitutes the entire
understanding and agreement between the parties hereto with respect to your severance benefits and the settlement of claims against the Company and cancels all previous oral and written negotiations,
agreements, commitments and writings in connection therewith. Nothing in this paragraph, however, shall modify, cancel or supersede your obligations set forth in paragraph 2 herein.

| |  |               |  |  |  | 
| |  | ------------- |  |  |  | 
| |  | Sepracor Inc. |  | 
| |  | By:           |  |  |  | 
| |  | Name:
Title:  |  | 

I
hereby agree to the terms and conditions set forth above. I have been given at least twenty-one (21) days to consider this agreement and I have chosen to execute
this on the date below. I intend that this agreement become a binding agreement between me and the Company if I do not revoke my acceptance in seven (7) days by
notifying                                    in
writing.

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|     |  | Date |  | 
|Name |  |      |  | 

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