Exhibit 10.18
 
 MERCK & CO., INC.
 PLAN FOR DEFERRED PAYMENT OF
 DIRECTORS COMPENSATION
 (Amended and Restated as of January 1, 2009)




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TABLE OF CONTENTS
 PageArticle I
    
    Purpose
    
    
    1Article II
    
    Election of Deferral, Investment Alternatives and Distribution Schedule
    
    
    1Article III
    
    Valuation of Deferred Amounts
    
    
    3Article IV
    
    Redesignation Within a Deferral Account
    
    
    4Article V
    
    Payment of Deferred Amounts
    
    
    5Article VI
    
    Designation of Beneficiary
    
    
    5Article VII
    
    Plan Amendment or Termination
    
    
    6Article VIII
    
    Section 409A Compliance
    
    
    6
 (i)




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MERCK & CO., INC.
PLAN FOR DEFERRED PAYMENT OF
DIRECTORS COMPENSATION
 I. PURPOSE
  II.

    ELECTION OF DEFERRAL, INVESTMENT ALTERNATIVES AND DISTRIBUTION SCHEDULE
 A.
    
    Election of Voluntary Deferral Amount1.
    
    Prior to December 31 of each year, each director may irrevocably elect (an
Initial Election) to defer, until termination of service as a director or later, 50%
or 100% of each of the following (together, the Voluntary Deferral Amount) with
respect to the 12 months beginning April 1 of the next calendar year after such
Initial Election:
 
 2.
    
    Prior to commencement of duties as a director or within the first 30 days
following commencement of services, a director newly elected or appointed to the Board
during a calendar year may make an Initial Election for the portion of the Voluntary
Deferral Amount applicable to such directors first year of service (or part thereof).3.
    
    The Voluntary Deferral Amount shall be credited as follows: (1) Board and
committee meeting fees that are deferred are credited as of the last business day of
each calendar quarter; (2) if the Board retainer, Lead Director retainer, Committee
Chairperson retainer and/or Audit Committee member retainer are deferred, a pro-rata
share of the deferred retainer is credited as of the last business day of each
calendar quarter. The dates as of which the Voluntary Deferral Amount, or parts
thereof, are credited to the directors deferred account are hereinafter referred to
as the Voluntary Deferral Dates.4.
    
    Effective December 1, 2008, once an Initial Election is made, it shall
continue to apply in successive years on the same terms and conditions until the
director makes a new Initial Election.B.
    
    Mandatory Deferral Amount1.
    
    As of the Friday following the Companys Annual Meeting of Stockholders (the
Mandatory Deferral Date), each director will be credited with an amount equivalent
to the annual cash retainer for the 12 month period beginning on the




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April 1 preceding the Annual Meeting (the Mandatory Deferral Amount). The
Mandatory Deferral Amount will be measured by the Merck Common Stock account.
 2.
    
    A director newly elected or appointed to the Board after the Mandatory
Deferral Date will be credited with a pro rata portion of the Mandatory Deferral
Amount applicable to such directors first year of service (or part thereof). Such
pro rata portion shall be credited to the directors account as of the first day of
such directors service.C.
    
    Automatic Deferral of Executive Committee FeesBetween June 2005, and April 2007, directors who served as either Chairperson or
member of the Boards Executive Committee, in lieu of any cash payment for such
service, were credited with an amount provided by way of retainer or meeting fees
(the Automatic Deferral Amount). The Automatic Deferral Amount is measured by
the Merck Common Stock account.D.
    
    Election of Investment AlternativesEach Initial Election shall include an election as to the investment alternatives
by which the value of amounts deferred will be measured in accordance with Article
III, below. Investment alternatives available under this Plan shall be the same as
the investment alternatives available from time to time under the Merck & Co., Inc.
Deferral Program (the Executive Deferral Program); provided, however, that at all
times there shall be a Merck Common Stock fund. All investment alternatives other
than Merck Common Stock are referred to herein as Other Investment Alternatives.E.
    
    Initial Election of Distribution ScheduleAn Initial Election shall include an election of the year during which the
Distribution Date (as defined below) shall occur and shall apply to all Voluntary
Deferral Amounts, Mandatory Deferral Amounts and Automatic Deferral Amounts
credited during the same period. The Distribution Date shall be the 15th day of
the month (or, if such day is not a business day, the next business day) of a
calendar quarter following the Directors termination of service as a director or
such number of years thereafter as would be permitted for distributions elected
under the Executive Deferral Program.F.
    
    Changes to Distribution ScheduleIf and to the extent that participants in the Executive Deferral Program are
permitted to make re-deferral elections from time to time, participants in this
Plan may elect to defer their Distribution Dates subject to the same restrictions
applicable under the Executive Deferral Program; provided, however, that no
re-deferral election may have the effect of accelerating a distribution prior to a
directors termination of service or death.
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III. VALUATION OF DEFERRED AMOUNTS
 A.
    
    Merck Common Stock1.
    
    Initial Crediting. The annual Mandatory Deferral Amount shall be used to
determine the number of full and partial shares of Merck Common Stock that such amount
would purchase at the closing price of the Common Stock on the New York Stock Exchange
(NYSE) on the Mandatory Deferral Date.The Automatic Deferral Amount was used to determine the number of full and partial shares of Merck Common Stock that such amount would have purchased at the closing
price of the Common Stock on the NYSE.That portion of the Voluntary Deferral Amount allocated to Merck Common Stock shall
be used to determine the number of full and partial shares of Merck Common Stock
that such amount would purchase at the closing price of the Common Stock on the
NYSE on the applicable Voluntary Deferral Date.This Plan is unfunded: at no time will any shares of Merck Common Stock be
purchased or earmarked for such deferred amounts nor will any rights of a
shareholder exist with respect to such amounts.2.
    
    Dividends.Each directors account will be credited with the additional
number of full and partial shares of Merck Common Stock that would have been
purchasable with the dividends on shares previously credited to the account at the
closing price of the Common Stock on the NYSE on the date each dividend was paid.3.
    
    Distributions.Distributions from the Merck Common Stock account will be
valued at the closing price of Merck Common Stock on the NYSE as of the Distribution
Date.4.
    
    For purposes of valuation of Merck Common Stock, if Merck Common Stock is no
longer traded on the NYSE, but is publicly traded on any other exchange, references to
NYSE shall mean such other exchange. If Merck Common Stock is not publicly traded and
if the Committee on Corporate Governance of the Board of Directors determines that a
measurement of Merck Common Stock on any Mandatory or Voluntary Deferral Date or
Distribution Date would not constitute fair market value, then the Committee shall
decide on the date and method to determine fair market value, which shall be in accord
with any requirements set forth under Section 409A or any successor thereto.B.
    
    Other Investment Alternatives1.
    
    Initial Crediting.The amount allocated to each Other Investment Alternative
shall be used to determine the full and partial Other Investment Alternative shares
that such amount would purchase at the closing net asset value of the Other Investment
Alternative shares on the Mandatory or Voluntary Deferral Date, whichever is
applicable. The directors account will be credited with the number of full and
partial Other Investment Alternative shares so determined.
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At no time will any Other Investment Alternative shares be purchased or earmarked
for such deferred amounts nor will any rights of a shareholder exist with respect
to such amounts.
 2.
    
    Dividends.Each directors account will be credited with the additional
number of full and partial Other Investment Alternative shares that would have been
purchasable, at the closing net asset value of the Other Investment Alternative shares
as of the date each dividend is paid on the Other Investment Alternative shares, with
the dividends that would have been paid on the number of shares previously credited to
such account (including pro rata dividends on any partial shares).3.
    
    Distributions.Other Investment Alternative distributions will be valued
based on the closing net asset value of the Other Investment Alternative shares as of
the Distribution Date.C.
    
    AdjustmentsIn the event of a reorganization, recapitalization, stock split, stock dividend,
combination of shares, merger, consolidation, rights offering or any other change
in the corporate structure or shares of the Company or an Other Investment
Alternative, the number and kind of shares or units shall be adjusted accordingly.
 IV. REDESIGNATION WITHIN A DEFERRAL ACCOUNT
 A.
    
    GeneralA director may redesignate how his or her account is invested among the Other
Investment Alternatives (a Redesignation). A Redesignation affects only the
Investment Alternatives; it does not affect the timing of distributions from the
Plan. Amounts deferred using the Merck Common Stock method and any earnings
attributable to such deferrals may not be redesignated prior to the first
anniversary of the termination of the directors service.The change will be
effective at the closing price as of (i) the day when the redesignation request is
received pursuant to administrative guidelines established by the Human Resources
Financial Services area provided the request is received prior to the close of the
NYSE on such day or (ii) the next following business day if the request is received
when the NYSE is closed.
 B.
    
    When Redesignation May Occur1.
    
    During Active Service. There is no limit on the number of times a director
may Redesignate the portion of his/her deferred account permitted to be Redesignated.
Each such request shall be irrevocable and can be Redesignated in whole percentages or
as a dollar amount.2.
    
    After Death. Following the death of a director, the legal representative or
beneficiary of such director may Redesignate subject to the same rules as for active
directors set forth in Article IV, Section B.1.
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C.
    
    Valuation of Amounts to be RedesignatedThe portion of the directors account to be Redesignated will be valued at its cash
equivalent and such cash equivalent will be converted into shares or units of the
Other Investment Alternatives. For purposes of such Redesignations, the cash
equivalent of the value of the Other Investment Alternative shares shall be the
closing net asset value of such Other Investment Alternative as of (i) the day when
the Redesignation request is received pursuant to administrative guidelines
established by the Human Resources Financial Services area of the Treasury
department, provided the request is received prior to the close of the NYSE on such
day or (ii) the next following business day if the request is received when the
NYSE is closed.
 V. PAYMENT OF DEFERRED AMOUNTS
 A.
    
    PaymentAll payments to directors of amounts deferred will be in cash as of the
Distribution Date. Distributions shall be pro rata by investment alternative.
Distributions shall be paid as soon as administratively feasible after the
Distribution Date.B.
    
    ForfeituresA directors deferred amount attributable to the Mandatory Deferral Amount and
earnings thereon shall be forfeited upon his or her removal as a director or upon a
determination by the Committee on Corporate Governance, in its sole discretion
that, a director has:
 (i)
    
    joined the Board of, managed, operated, participated in a
material way in, entered employment with, performed consulting (or any other)
services for, or otherwise been connected in any material manner with a
company, corporation, enterprise, firm, limited partnership, partnership,
person, sole proprietorship or any other business entity determined by the
Committee on Corporate Governance in its sole discretion to be competitive
with the business of the Company, its subsidiaries or its affiliates (a
Competitor);(ii)
    
    directly or indirectly acquired an equity interest of
5 percent or greater in a Competitor; or(iii)
    
    disclosed any material trade secrets or other material
confidential information, including customer lists, relating to the Company or
to the business of the Company to others, including a Competitor.
 VI. DESIGNATION OF BENEFICIARY
   5




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VII. PLAN AMENDMENT OR TERMINATION
  VIII. SECTION 409A COMPLIANCE
  6