SECURITIES & EXCHANGE COMMISSION
                             Washington, D.C. 20549
                             ----------------------

                                  SCHEDULE 13G*


                    Under the Securities Exchange Act of 1934
                           (Amendment No.__________)*


                             PHARMERICA CORPORATION
    -------------------------------------------------------------------------
                                (Name of Issuer)

                     Common Stock, $.01 par value per share
    -------------------------------------------------------------------------
                         (Title of Class of Securities)

                                    71714F104
    -------------------------------------------------------------------------
                                 (CUSIP Number)

                               September 20, 2007
    -------------------------------------------------------------------------
             (Date of Event Which Requires Filing of this Statement)


     Check the appropriate box to designate the rule pursuant to which this
Schedule 13G is filed:
     [ ]  Rule 13d-1(b)
     [X]  Rule 13d-1(c)
     [ ]  Rule 13d-1(d)





                              (Page 1 of 15 Pages)
----------------
     *The remainder of this cover page shall be filled out for a reporting
person's initial filing on this form with respect to the subject class of
securities, and for any subsequent amendment containing information which would
alter the disclosures provided in a prior cover page.

     The information required in the remainder of this cover page shall not be
deemed to be "filed" for purposes of Section 18 of the Securities Exchange Act
of 1934 ("Act") or otherwise subject to the liabilities of that section of the
Act but shall be subject to all other provisions of the Act (however, see the
Notes).





CUSIP No. 71714F104                 13G                  Page 2 of 15 Pages

--------------------------------------------------------------------------------
     (1)    NAMES OF REPORTING PERSONS
            I.R.S. IDENTIFICATION NO.
            OF ABOVE PERSONS (ENTITIES ONLY)
                                           Lone Spruce, L.P.
--------------------------------------------------------------------------------
     (2)    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP **
                                                             (a) [X]
                                                             (b) [ ]
--------------------------------------------------------------------------------
     (3)    SEC USE ONLY
--------------------------------------------------------------------------------
     (4)    CITIZENSHIP OR PLACE OF ORGANIZATION
                            Delaware
--------------------------------------------------------------------------------
NUMBER OF      (5)  SOLE VOTING POWER
                                                     -0-
SHARES         -----------------------------------------------------------------

BENEFICIALLY   (6)  SHARED VOTING POWER
                                                  75,786
OWNED BY       -----------------------------------------------------------------

EACH           (7)  SOLE DISPOSITIVE POWER
                                                     -0-
REPORTING      -----------------------------------------------------------------

PERSON WITH    (8)  SHARED DISPOSITIVE POWER
                                                  75,786
--------------------------------------------------------------------------------
     (9)    AGGREGATE AMOUNT BENEFICIALLY OWNED
            BY EACH REPORTING PERSON
                                                  75,786
--------------------------------------------------------------------------------
     (10)   CHECK BOX IF THE AGGREGATE AMOUNT
            IN ROW (9) EXCLUDES CERTAIN SHARES **                      [ ]
--------------------------------------------------------------------------------
     (11)   PERCENT OF CLASS REPRESENTED
            BY AMOUNT IN ROW (9)
                                                   0.3
--------------------------------------------------------------------------------
     (12)   TYPE OF REPORTING PERSON **
                                                    PN
--------------------------------------------------------------------------------
                     ** SEE INSTRUCTIONS BEFORE FILLING OUT!





CUSIP No. 71714F104                 13G                  Page 3 of 15 Pages

--------------------------------------------------------------------------------
     (1)    NAMES OF REPORTING PERSONS
            I.R.S. IDENTIFICATION NO.
            OF ABOVE PERSONS (ENTITIES ONLY)
                                           Lone Balsam, L.P.
--------------------------------------------------------------------------------
     (2)    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP **
                                                             (a) [X]
                                                             (b) [ ]
--------------------------------------------------------------------------------
     (3)    SEC USE ONLY
--------------------------------------------------------------------------------
     (4)    CITIZENSHIP OR PLACE OF ORGANIZATION
                            Delaware
--------------------------------------------------------------------------------
NUMBER OF      (5)  SOLE VOTING POWER
                                                     -0-
SHARES         -----------------------------------------------------------------

BENEFICIALLY   (6)  SHARED VOTING POWER
                                                 166,306
OWNED BY       -----------------------------------------------------------------

EACH           (7)  SOLE DISPOSITIVE POWER
                                                     -0-
REPORTING      -----------------------------------------------------------------

PERSON WITH    (8)  SHARED DISPOSITIVE POWER
                                                 166,306
--------------------------------------------------------------------------------
     (9)    AGGREGATE AMOUNT BENEFICIALLY OWNED
            BY EACH REPORTING PERSON
                                                 166,306
--------------------------------------------------------------------------------
     (10)   CHECK BOX IF THE AGGREGATE AMOUNT
            IN ROW (9) EXCLUDES CERTAIN SHARES **                      [ ]
--------------------------------------------------------------------------------
     (11)   PERCENT OF CLASS REPRESENTED
            BY AMOUNT IN ROW (9)
                                                   0.6%
--------------------------------------------------------------------------------
     (12)   TYPE OF REPORTING PERSON **
                                                    PN
--------------------------------------------------------------------------------
                     ** SEE INSTRUCTIONS BEFORE FILLING OUT!





CUSIP No. 71714F104                 13G                  Page 4 of 15 Pages

--------------------------------------------------------------------------------
     (1)    NAMES OF REPORTING PERSONS
            I.R.S. IDENTIFICATION NO.
            OF ABOVE PERSONS (ENTITIES ONLY)
                                           Lone Sequoia, L.P.
--------------------------------------------------------------------------------
     (2)    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP **
                                                             (a) [X]
                                                             (b) [ ]
--------------------------------------------------------------------------------
     (3)    SEC USE ONLY
--------------------------------------------------------------------------------
     (4)    CITIZENSHIP OR PLACE OF ORGANIZATION
                            Delaware
--------------------------------------------------------------------------------
NUMBER OF      (5)  SOLE VOTING POWER
                                                     -0-
SHARES         -----------------------------------------------------------------

BENEFICIALLY   (6)  SHARED VOTING POWER
                                                  138,941
OWNED BY       -----------------------------------------------------------------

EACH           (7)  SOLE DISPOSITIVE POWER
                                                     -0-
REPORTING      -----------------------------------------------------------------

PERSON WITH    (8)  SHARED DISPOSITIVE POWER
                                                 138,941
--------------------------------------------------------------------------------
     (9)    AGGREGATE AMOUNT BENEFICIALLY OWNED
            BY EACH REPORTING PERSON
                                                 138,941
--------------------------------------------------------------------------------
     (10)   CHECK BOX IF THE AGGREGATE AMOUNT
            IN ROW (9) EXCLUDES CERTAIN SHARES **                      [ ]
--------------------------------------------------------------------------------
     (11)   PERCENT OF CLASS REPRESENTED
            BY AMOUNT IN ROW (9)
                                                   0.5%
--------------------------------------------------------------------------------
     (12)   TYPE OF REPORTING PERSON **
                                                    PN
--------------------------------------------------------------------------------
                     ** SEE INSTRUCTIONS BEFORE FILLING OUT!





CUSIP No. 71714F104                 13G                  Page 5 of 15 Pages

--------------------------------------------------------------------------------
     (1)    NAMES OF REPORTING PERSONS
            I.R.S. IDENTIFICATION NO.
            OF ABOVE PERSONS (ENTITIES ONLY)
                                           Lone Pine Associates LLC
--------------------------------------------------------------------------------
     (2)    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP **
                                                             (a) [X]
                                                             (b) [ ]
--------------------------------------------------------------------------------
     (3)    SEC USE ONLY
--------------------------------------------------------------------------------
     (4)    CITIZENSHIP OR PLACE OF ORGANIZATION
                            Delaware
--------------------------------------------------------------------------------
NUMBER OF      (5)  SOLE VOTING POWER
                                                     -0-
SHARES         -----------------------------------------------------------------

BENEFICIALLY   (6)  SHARED VOTING POWER
                                                 381,033
OWNED BY       -----------------------------------------------------------------

EACH           (7)  SOLE DISPOSITIVE POWER
                                                     -0-
REPORTING      -----------------------------------------------------------------

PERSON WITH    (8)  SHARED DISPOSITIVE POWER
                                                 381,033
--------------------------------------------------------------------------------
     (9)    AGGREGATE AMOUNT BENEFICIALLY OWNED
            BY EACH REPORTING PERSON
                                                 381,033
--------------------------------------------------------------------------------
     (10)   CHECK BOX IF THE AGGREGATE AMOUNT
            IN ROW (9) EXCLUDES CERTAIN SHARES **                      [ ]
--------------------------------------------------------------------------------
     (11)   PERCENT OF CLASS REPRESENTED
            BY AMOUNT IN ROW (9)
                                                   1.3%
--------------------------------------------------------------------------------
     (12)   TYPE OF REPORTING PERSON **
                                                    OO
--------------------------------------------------------------------------------
                     ** SEE INSTRUCTIONS BEFORE FILLING OUT!





CUSIP No. 71714F104                 13G                  Page 6 of 15 Pages

--------------------------------------------------------------------------------
     (1)    NAMES OF REPORTING PERSONS
            I.R.S. IDENTIFICATION NO.
            OF ABOVE PERSONS (ENTITIES ONLY)
                                           Lone Pine Capital LLC
--------------------------------------------------------------------------------
     (2)    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP **
                                                             (a) [X]
                                                             (b) [ ]
--------------------------------------------------------------------------------
     (3)    SEC USE ONLY
--------------------------------------------------------------------------------
     (4)    CITIZENSHIP OR PLACE OF ORGANIZATION
                            Delaware
--------------------------------------------------------------------------------
NUMBER OF      (5)  SOLE VOTING POWER
                                                     -0-
SHARES         -----------------------------------------------------------------

BENEFICIALLY   (6)  SHARED VOTING POWER
                                               1,724,121
OWNED BY       -----------------------------------------------------------------

EACH           (7)  SOLE DISPOSITIVE POWER
                                                     -0-
REPORTING      -----------------------------------------------------------------

PERSON WITH    (8)  SHARED DISPOSITIVE POWER
                                               1,724,121
--------------------------------------------------------------------------------
     (9)    AGGREGATE AMOUNT BENEFICIALLY OWNED
            BY EACH REPORTING PERSON
                                               1,724,121
--------------------------------------------------------------------------------
     (10)   CHECK BOX IF THE AGGREGATE AMOUNT
            IN ROW (9) EXCLUDES CERTAIN SHARES **                      [ ]
--------------------------------------------------------------------------------
     (11)   PERCENT OF CLASS REPRESENTED
            BY AMOUNT IN ROW (9)
                                                   5.7%
--------------------------------------------------------------------------------
     (12)   TYPE OF REPORTING PERSON **
                                                    IA
--------------------------------------------------------------------------------
                     ** SEE INSTRUCTIONS BEFORE FILLING OUT!





CUSIP No. 71714F104                 13G                  Page 7 of 15 Pages

--------------------------------------------------------------------------------
     (1)    NAMES OF REPORTING PERSONS
            I.R.S. IDENTIFICATION NO.
            OF ABOVE PERSONS (ENTITIES ONLY)
                                                    Stephen F. Mandel, Jr.
--------------------------------------------------------------------------------
     (2)    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP **
                                                             (a) [X]
                                                             (b) [ ]
--------------------------------------------------------------------------------
     (3)    SEC USE ONLY
--------------------------------------------------------------------------------
     (4)    CITIZENSHIP OR PLACE OF ORGANIZATION
                            United States
--------------------------------------------------------------------------------
NUMBER OF      (5)  SOLE VOTING POWER
                                                     -0-
SHARES         -----------------------------------------------------------------

BENEFICIALLY   (6)  SHARED VOTING POWER
                                               2,105,154
OWNED BY       -----------------------------------------------------------------

EACH           (7)  SOLE DISPOSITIVE POWER
                                                     -0-
REPORTING      -----------------------------------------------------------------

PERSON WITH    (8)  SHARED DISPOSITIVE POWER
                                               2,105,154
--------------------------------------------------------------------------------
     (9)    AGGREGATE AMOUNT BENEFICIALLY OWNED
            BY EACH REPORTING PERSON
                                               2,105,154
--------------------------------------------------------------------------------
     (10)   CHECK BOX IF THE AGGREGATE AMOUNT
            IN ROW (9) EXCLUDES CERTAIN SHARES **                      [ ]
--------------------------------------------------------------------------------
     (11)   PERCENT OF CLASS REPRESENTED
            BY AMOUNT IN ROW (9)
                                                   7.0%
--------------------------------------------------------------------------------
     (12)   TYPE OF REPORTING PERSON **
                                                    IN
--------------------------------------------------------------------------------
                     ** SEE INSTRUCTIONS BEFORE FILLING OUT!





CUSIP No. 71714F104                 13G                  Page 8 of 15 Pages

Item 1(a).     Name of Issuer:

     PharMerica Corporation (the "Issuer").

Item 1(b).     Address of Issuer's Principal Executive Offices:

     1901 Campus Place, Louisville, KY 40299.

Item 2(a).     Name of Person Filing:

     This statement is filed by:
          (i) Lone Spruce, L.P., a Delaware limited partnership ("Lone Spruce"),
              with respect to the Common Stock (defined in Item 2(d) below)
              directly owned by it;
         (ii) Lone Balsam, L.P., a Delaware limited partnership ("Lone Balsam"),
              with respect to the Common Stock directly owned by it;
        (iii) Lone Sequoia, L.P., a Delaware limited partnership ("Lone
              Sequoia"), with respect to the Common Stock directly owned by it;
         (iv) Lone Pine Associates LLC, a Delaware limited liability company
              ("Lone Pine Associates"), with respect to the Common Stock
              directly owned by Lone Spruce, Lone Balsam and Lone Sequoia;
         (v)  Lone Pine Capital LLC, a Delaware limited liability company ("Lone
              Pine Capital"), which serves as investment manager to Lone
              Cypress, Ltd. ("Lone Cypress"), a Cayman Islands exempted company,
              with respect to the Common Stock owned by Lone Cypress; and
         (vi) Stephen F. Mandel, Jr. ("Mr. Mandel"), with respect to the Common
              Stock directly owned by each of Lone Spruce, Lone Balsam, Lone
              Sequoia and Lone Cypress.

              The foregoing persons are hereinafter sometimes
         collectively referred to as the "Reporting Persons".  Any





CUSIP No. 71714F104                 13G                  Page 9 of 15 Pages

         disclosures herein with respect to persons other than the Reporting
         Persons are made on information and belief after making inquiry to the
         appropriate party.

Item 2(b).     Address of Principal Business Office or, if None, Residence:

     The address of the business office of each of the Reporting Persons is Two
Greenwich Plaza, Greenwich, Connecticut 06830.

Item 2(c).     Citizenship:

     Lone Spruce, Lone Balsam and Lone Sequoia are limited partnerships
organized under the laws of the State of Delaware. Lone Pine Associates and Lone
Pine Capital are limited liability companies organized under the laws of the
State of Delaware. Mr. Mandel is a United States citizen.

Item 2(d).     Title of Class of Securities:

     Common Stock, $.01 par value per share (the "Common Stock")

Item 2(e).  CUSIP Number:

     71714F104





CUSIP No. 71714F104                 13G                  Page 10 of 15 Pages

Item 3. If this statement is filed pursuant to Rules 13d-1(b) or 13d-2(b) or
(c), check whether the person filing is a:

          (a) [ ]  Broker or dealer registered under Section 15 of the Act,

          (b) [ ]  Bank as defined in Section 3(a)(6) of the Act,

          (c) [ ]  Insurance Company as defined in Section 3(a)(19) of the
                   Act,

          (d) [ ]  Investment Company registered under Section 8 of the
                   Investment Company Act of 1940,

          (e) [ ]  Investment Adviser in accordance with Rule
                   13d-1(b)(1)(ii)(E),

          (f) [ ]  Employee Benefit Plan or Endowment Fund in accordance
                   with Rule 13d-1(b)(1)(ii)(F),

          (g) [ ]  Parent Holding Company or control person in accordance
                   with Rule 13d-1(b)(1)(ii)(G),

          (h) [ ]  Savings Association as defined in Section 3(b) of the
                   Federal Deposit Insurance Act,

          (i) [ ]  Church Plan that is excluded from the definition of an
                   investment company under Section 3(c)(14) of the Investment
                   Company Act of 1940,

          (j) [ ]  Group, in accordance with Rule 13d-1(b)(1)(ii)(J).

If this statement is filed pursuant to Rule 13d-1(c), check the box. [X]

Item 4.   Ownership.

     A.  Lone Spruce, L.P.
             (a) Amount beneficially owned: 75,786
             (b) Percent of class: 0.3% The percentages used herein and in the
rest of Item 4 are calculated based upon the 30,412,278 shares of Common Stock
issued and outstanding at August 24, 2007, as reported in the Company's
Form 10-Q for the quarterly period ended June 30, 2007, filed on
August 31, 2007.
             (c)(i) Sole power to vote or direct the vote: -0-
               (ii) Shared power to vote or direct the vote: 75,786
              (iii) Sole power to dispose or direct the disposition: -0-
               (iv) Shared power to dispose or direct the disposition: 75,786





CUSIP No. 71714F104                 13G                  Page 11 of 15 Pages

     B.  Lone Balsam, L.P.
             (a) Amount beneficially owned: 166,306
             (b) Percent of class: 0.6%
             (c)(i) Sole power to vote or direct the vote: -0-
               (ii) Shared power to vote or direct the vote: 166,306
              (iii) Sole power to dispose or direct the disposition: -0-
               (iv) Shared power to dispose or direct the disposition: 166,306

     C.  Lone Sequoia, L.P.
             (a) Amount beneficially owned: 138,941
             (b) Percent of class: 0.5%
             (c)(i) Sole power to vote or direct the vote: -0-
               (ii) Shared power to vote or direct the vote: 138,941
              (iii) Sole power to dispose or direct the disposition: -0-
               (iv) Shared power to dispose or direct the disposition: 138,941

     D.  Lone Pine Associates LLC
             (a) Amount beneficially owned: 381,033
             (b) Percent of class: 1.3%
             (c)(i) Sole power to vote or direct the vote: -0-
               (ii) Shared power to vote or direct the vote: 381,033
              (iii) Sole power to dispose or direct the disposition: -0-
               (iv) Shared power to dispose or direct the disposition: 381,033




CUSIP No. 71714F104                 13G                  Page 12 of 15 Pages

     E.  Lone Pine Capital LLC
             (a) Amount beneficially owned: 1,724,121
             (b) Percent of class: 5.7%
             (c)(i) Sole power to vote or direct the vote: -0-
               (ii) Shared power to vote or direct the vote: 1,724,121
              (iii) Sole power to dispose or direct the disposition: -0-
               (iv) Shared power to dispose or direct the disposition: 1,724,121

     F.  Stephen F. Mandel, Jr.
             (a) Amount beneficially owned: 2,105,154
             (b) Percent of class: 7.0%
             (c)(i) Sole power to vote or direct the vote: -0-
               (ii) Shared power to vote or direct the vote: 2,105,154
              (iii) Sole power to dispose or direct the disposition: -0-
               (iv) Shared power to dispose or direct the disposition: 2,105,154

Item 5.     Ownership of Five Percent or Less of a Class.

         Not applicable.

Item 6.     Ownership of More than Five Percent on Behalf of Another Person.

     Lone Pine Associates, the general partner of Lone Spruce, Lone Sequoia and
Lone Balsam, has the power to direct the affairs of Lone Spruce, Lone Sequoia
and Lone Balsam, including decisions respecting the disposition of the proceeds
from the sale of Common Stock. Lone Pine Capital, the investment manager of Lone
Cypress has the power to direct the receipt of dividends from or the proceeds of
the sale of Common Stock held by Lone Cypress. Mr. Mandel is the Managing Member
of each of Lone Pine Associates and Lone Pine Capital and in such capacity
directs their operations.





CUSIP No. 71714F104                 13G                  Page 13 of 15 Pages

Item 7.     Identification and Classification of the Subsidiary Which
Acquired the Security Being Reported on by the Parent Holding Company.

     Not applicable.

Item 8.   Identification and Classification of Members of the Group.

     See Item 2.

Item 9.   Notice of Dissolution of Group.

     Not applicable.

Item 10.  Certification.

     Each of the Reporting Persons hereby makes the following certification:

          By signing below I certify that, to the best of my knowledge and
belief, the securities referred to above were not acquired and are not held for
the purpose of or with the effect of changing or influencing the control of the
issuer of the securities and were not acquired and are not held in connection
with or as a participant in any transaction having that purpose or effect.





CUSIP No. 71714F104                 13G                  Page 14 of 15 Pages


                                   SIGNATURES

         After reasonable inquiry and to the best of our knowledge and belief,
the undersigned certify that the information set forth in this statement is
true, complete and correct.

DATED:  October 1, 2007

                           By:
                              ----------------------------------------
                              Stephen F. Mandel, Jr., individually and
                              (a) as Managing Member of Lone Pine
                              Associates LLC, for itself and as the
                              general partner of (i) Lone Spruce, L.P.,
                              (ii) Lone Balsam, L.P. and (iii) Lone
                              Sequoia, L.P.; and (b) as Managing Member
                              of Lone Pine Capital LLC




CUSIP No. 71714F104                 13G                  Page 15 of 15 Pages

                                    EXHIBIT 1

                           JOINT ACQUISITION STATEMENT
                            PURSUANT TO RULE 13d-1(k)


     The undersigned acknowledge and agree that the foregoing statement on
Schedule 13G, is filed on behalf of each of the undersigned and that all
subsequent amendments to this statement on Schedule 13G, shall be filed on
behalf of each of the undersigned without the necessity of filing additional
joint acquisition statements. The undersigned acknowledge that each shall be
responsible for the timely filing of such amendments, and for the completeness
and accuracy of the information concerning him or it contained therein, but
shall not be responsible for the completeness and accuracy of the information
concerning the others, except to the extent that he or it knows or has reason to
believe that such information is inaccurate.


DATED:  October 1, 2007

                           By:
                              ----------------------------------------
                              Stephen F. Mandel, Jr., individually and
                              (a) as Managing Member of Lone Pine
                              Associates LLC, for itself and as the
                              general partner of (i) Lone Spruce, L.P.,
                              (ii) Lone Balsam, L.P. and (iii) Lone
                              Sequoia, L.P.; and (b) as Managing Member
                              of Lone Pine Capital LLC