UNITED STATES
                        SECURITIES EXCHANGE COMMISSION
                            Washington, D.C. 20549

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


                                 SCHEDULE 13G

                   Under the Securities Exchange Act of 1934
                               (Amendment No. 1)

                              NEIGHBORCARE, INC.
                              ------------------
                               (Name of Issuer)


                    Common Stock, par value $.02 per share
                ----------------------------------------------
                        (Title of Class of Securities)


                                   64015Y104
                            -------------------------
                                (CUSIP Number)


                              December 31, 2004 
                            -------------------------
            (Date of Event which Requires Filing of this Statement)


Check the  appropriate box to designate the rule pursuant to which this Schedule
is filed:

                              [ ]  Rule 13d-1(b)

                              [X]  Rule 13d-1(c)

                              [ ]  Rule 13d-1(d)

* 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 the purpose 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).


                         Continued on following pages
                              Page 1 of 13 Pages
                            Exhibit Index: Page 12



                                 SCHEDULE 13G

CUSIP No.: 64015Y104                                          Page 2 of 13 Pages
................................................................................
1.       Names of Reporting Persons.
         I.R.S. Identification Nos. of above persons (entities only).

         CHESAPEAKE PARTNERS MANAGEMENT CO., INC.
................................................................................
2.       Check the Appropriate Box if a Member of a Group
         (a) [ ]
         (b) [X]
................................................................................
3.       SEC Use Only
................................................................................
4.       Citizenship or Place of Organization

         Maryland
................................................................................
Number of          5.     Sole Voting Power            0
Shares             .............................................................
Beneficially       6.     Shared Voting Power          2,395,293
Owned by Each      .............................................................
Reporting          7.     Sole Dispositive Power       0
Person With        .............................................................
                   8.     Shared Dispositive Power     2,395,293
................................................................................
9.       Aggregate Amount Beneficially Owned by Each Reporting Person

         2,395,293
................................................................................
10.      Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See
         Instructions)

         [ ]
................................................................................
11.      Percent of Class Represented by Amount in Row (9)

         5.4% based on 44,121,407 shares outstanding as of February 4, 2005.
................................................................................
12.      Type of Reporting Person:

         CO



                                 SCHEDULE 13G

CUSIP No.: 64015Y104                                          Page 3 of 13 Pages
................................................................................
1.       Names of Reporting Persons.
         I.R.S. Identification Nos. of above persons (entities only).

         CHESAPEAKE PARTNERS LIMITED PARTNERSHIP
................................................................................
2.       Check the Appropriate Box if a Member of a Group
         (a) [ ]
         (b) [X]
................................................................................
3.       SEC Use Only
................................................................................
4.       Citizenship or Place of Organization

         Maryland
................................................................................
Number of          5.     Sole Voting Power            0
Shares             .............................................................
Beneficially       6.     Shared Voting Power          1,284,390
Owned by Each      .............................................................
Reporting          7.     Sole Dispositive Power       0
Person With        .............................................................
                   8.     Shared Dispositive Power     1,284,390
................................................................................
9.       Aggregate Amount Beneficially Owned by Each Reporting Person

         1,284,390
................................................................................
10.      Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See
         Instructions)

         [X]
................................................................................
11.      Percent of Class Represented by Amount in Row (9)

         2.9% based on 44,121,407 shares outstanding as of February 4, 2005.
................................................................................
12.      Type of Reporting Person:

         PN



                                 SCHEDULE 13G

CUSIP No.: 64015Y104                                          Page 4 of 13 Pages
................................................................................
1.       Names of Reporting Persons.
         I.R.S. Identification Nos. of above persons (entities only).

         CHESAPEAKE PARTNERS INSTITUTIONAL FUND LIMITED PARTNERSHIP
................................................................................
2.       Check the Appropriate Box if a Member of a Group
         (a) [ ]
         (b) [X]
................................................................................
3.       SEC Use Only
................................................................................
4.       Citizenship or Place of Organization

         Maryland
................................................................................
Number of          5.     Sole Voting Power            0
Shares             .............................................................
Beneficially       6.     Shared Voting Power          0
Owned by Each      .............................................................
Reporting          7.     Sole Dispositive Power       0
Person With        .............................................................
                   8.     Shared Dispositive Power     0
................................................................................
9.       Aggregate Amount Beneficially Owned by Each Reporting Person

         0
................................................................................
10.      Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See
         Instructions)

         [X]
................................................................................
11.      Percent of Class Represented by Amount in Row (9)

         0.0% based on 44,121,407 shares outstanding as of February 4, 2005.
................................................................................
12.      Type of Reporting Person:

         PN



                                 SCHEDULE 13G

CUSIP No.: 64015Y104                                          Page 5 of 13 Pages
................................................................................
1.       Names of Reporting Persons.
         I.R.S. Identification Nos. of above persons (entities only).

         CHESAPEAKE PARTNERS INTERNATIONAL LTD.
................................................................................
2.       Check the Appropriate Box if a Member of a Group
         (a) [ ]
         (b) [X]
................................................................................
3.       SEC Use Only
................................................................................
4.       Citizenship or Place of Organization

         Cayman Islands, British West Indies
................................................................................
Number of          5.     Sole Voting Power            0
Shares             .............................................................
Beneficially       6.     Shared Voting Power          1,027,803
Owned by Each      .............................................................
Reporting          7.     Sole Dispositive Power       0
Person With        .............................................................
                   8.     Shared Dispositive Power     1,027,803
................................................................................
9.       Aggregate Amount Beneficially Owned by Each Reporting Person

         1,027,803
................................................................................
10.      Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See
         Instructions)

         [X]
................................................................................
11.      Percent of Class Represented by Amount in Row (9)

         2.3% based on 44,121,407 shares outstanding as of February 4, 2005.
................................................................................
12.      Type of Reporting Person:

         CO



                                 SCHEDULE 13G

CUSIP No.: 64015Y104                                          Page 6 of 13 Pages
................................................................................
1.       Names of Reporting Persons.
         I.R.S. Identification Nos. of above persons (entities only).

         BARCLAYS GLOBAL INVESTORS EVENT DRIVEN FUND II
................................................................................
2.       Check the Appropriate Box if a Member of a Group
         (a) [ ]
         (b) [X]
................................................................................
3.       SEC Use Only
................................................................................
4.       Citizenship or Place of Organization

         Ireland
................................................................................
Number of          5.     Sole Voting Power            0
Shares             .............................................................
Beneficially       6.     Shared Voting Power          83,100
Owned by Each      .............................................................
Reporting          7.     Sole Dispositive Power       0
Person With        .............................................................
                   8.     Shared Dispositive Power     83,100
................................................................................
9.       Aggregate Amount Beneficially Owned by Each Reporting Person

         83,100
................................................................................
10.      Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See
         Instructions)

         [X]
................................................................................
11.      Percent of Class Represented by Amount in Row (9)

         0.2% based on 44,121,407 shares outstanding as of February 4, 2005.
................................................................................
12.      Type of Reporting Person:

         CO


                                                              Page 7 of 13 Pages

Item 1(a)      Name of Issuer:

               NeighborCare, Inc. (the "Issuer")

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

               601 East Pratt Street, 3rd Floor, Baltimore, MD 21202

Item 2(a)      Name of Person Filing

               This  Statement  is  filed  on  behalf  of each of the  following
persons (collectively, the "Reporting Persons"):

               i)    Chesapeake Partners Management Co., Inc. ("CPMC");

               ii)   Chesapeake Partners Limited Partnership ("CPLP");

               iii)  Chesapeake Partners Institutional Fund Limited Partnership
                     ("CPIFLP");

               iv)   Chesapeake Partners International Ltd. ("CPINTL"); and

               v)    Barclays Global Investors Event Driven Fund II
                     ("Barclays").

                This  Statement  relates to Shares (as defined  herein) held, or
formerly held, for the accounts of each of CPLP, CPIFLP and CPINTL.  CPMC serves
as investment  manager to each of CPLP,  CPIFLP and CPINTL.  CPMC also serves as
investment  manager to Barclays,  pursuant to a sub-advisory  agreement  between
CPMC and  Barclays.  In such  capacities,  CPMC may be deemed to have voting and
investment  power  over the  Shares  held for each of CPLP,  CPIFLP,  CPINTL and
Barclays.

Item 2(b)      Address of Principal Business Office or, if 0, Residence

               The  address of the  principal  business  office of each of CPMC,
CPLP and CPIFLP is 1829 Reisterstown Road, Suite 420, Baltimore, Maryland 21208.
The  address of the  principal business  office of CPINTL is c/o  Goldman  Sachs
Cayman Trust,  Harbour Centre,  Mary Street,  2nd Floor,  P.O. Box 896 GT, Grand
Cayman,  Cayman  Islands,  BWI. The address of the principal  business office of
Barclays is Abbey Court, Block C, Irish Life Center, Lower Abbey Street, Dublin,
Ireland.

Item 2(c)      Citizenship

               i) CPMC is a Maryland corporation;

               ii) CPLP is a Maryland limited partnership;

               iii) CPIFLP is a Maryland limited partnership;

               iv) CPINTL is a Cayman Islands exempted company; and

               v) Barclays is an Irish corporation.

Item 2(d)      Title of Class of Securities:

               Common Stock, par value $.02 per share (the "Shares").


                                                              Page 8 of 13 Pages

Item 2(e)      CUSIP Number:

               64015Y104

Item 3         If This Statement is Filed Pursuant to ss.ss.240.13d-1(b) or
               240.13d-2(b) or (c), Check Whether the Person Filing is a:

               This Item 3 is not applicable.

Item 4         Ownership:

Item 4(a)      Amount Beneficially Owned:

               As of February 8, 2005:

               (i) CPMC may be deemed to be the  beneficial  owner of  2,395,293
Shares.  This  amount consists of (A) 1,284,390  Shares held for  the account of
CPLP, (B) 1,027,803 Shares held for the account of CPINTL, and (C) 83,100 Shares
held for the account of Barclays.

               (ii)  CPLP may be deemed to be the beneficial owner of  1,284,390
Shares held for its account.

               (iii) CPIFLP may no longer be deemed to be the  beneficial  owner
of any Shares.

               (iv) CPINTL may be deemed to be the beneficial owner of 1,027,803
Shares held for its account.

               (v) Barclays may be deemed to be the  beneficial  owner of 83,100
Shares held for its account.

Item 4(b)      Percent of Class:

               (i) The  number of  Shares of which  CPMC may be deemed to be the
beneficial owner  constitutes  approximately  5.4% of the total number of Shares
outstanding  (based  upon  information  provided  by  the  Issuer  in  its  most
recently-filed  quarterly  statement on Form 10-Q, there were 44,121,407  Shares
outstanding as of February 4, 2005).

               (ii) The  number of Shares of which  CPLP may be deemed to be the
beneficial owner  constitutes  approximately  2.9% of the total number of Shares
outstanding.

               (iii) The  number of Shares of which  CPIFLP  may be deemed to be
the beneficial owner constitutes 0.0% of the total number of Shares outstanding.

               (iv) The number of Shares of which CPINTL may be deemed to be the
beneficial owner constitutes 2.3% of the total number of Shares outstanding.

               (v) The  number of Shares of which  Barclays  may be deemed to be
the beneficial owner constitutes 0.2% of the total number of Shares outstanding.



                                                              Page 9 of 13 Pages


Item 4(c)      Number of Shares of which such person has:

CPMC:
-----

(i) Sole power to vote or direct the vote:                                     0

(ii) Shared power to vote or direct the vote:                          2,395,293

(iii) Sole power to dispose or direct the disposition of:                      0

(iv) Shared power to dispose or direct the disposition of:             2,395,293

CPLP:
-----

(i) Sole power to vote or direct the vote:                                     0

(ii) Shared power to vote or direct the vote:                          1,284,390

(iii) Sole power to dispose or direct the disposition of:                      0

(iv) Shared power to dispose or direct the disposition of:             1,284,390

CPIFLP:
-------

(i) Sole power to vote or direct the vote:                                     0

(ii) Shared power to vote or direct the vote:                                  0

(iii) Sole power to dispose or direct the disposition of:                      0

(iv) Shared power to dispose or direct the disposition of:                     0

CPINTL:
-------

(i) Sole power to vote or direct the vote:                                     0

(ii) Shared power to vote or direct the vote:                          1,027,803

(iii) Sole power to dispose or direct the disposition of:                      0

(iv) Shared power to dispose or direct the disposition of:             1,027,803

Barclays:
---------

(i) Sole power to vote or direct the vote:                                     0

(ii) Shared power to vote or direct the vote:                             83,100

(iii) Sole power to dispose or direct the disposition of:                      0

(iv) Shared power to dispose or direct the disposition of:                83,100


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

               As of the date hereof, each of CPLP, CPIFLP,  CPINTL and Barclays
may no longer be deemed to be the beneficial  owner of more than five percent of
the Shares.


                                                             Page 10 of 13 Pages

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

               This Item 6 is not applicable.

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

               This Item 7 is not applicable.

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

               This Item 8 is not applicable.

Item 9.        Notice of Dissolution of Group:

               This Item 9 is not applicable.

Item 10.       Certification:

               By signing below each of the Reporting Persons certifies that, to
the best of their  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.



                                                             Page 11 of 13 Pages

                                   SIGNATURE

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

Date: February 14, 2005           CHESAPEAKE PARTNERS MANAGEMENT CO., INC.


                                  By: /s/ Mark D. Lerner
                                      ------------------------------------------
                                  Name:  Mark D. Lerner
                                  Title: Vice President

Date: February 14, 2005           CHESAPEAKE PARTNERS LIMITED PARTNERSHIP

                                  By: Chesapeake Partners Management Co., Inc.
                                      As General Partner

                                  By: /s/ Mark D. Lerner
                                      ------------------------------------------
                                  Name:  Mark D. Lerner
                                  Title: Vice President

Date: February 14, 2005           CHESAPEAKE PARTNERS INSTITUTIONAL FUND LIMITED
                                  PARTNERSHIP

                                  By: Chesapeake Partners Management Co., Inc.
                                      As General Partner

                                  By: /s/ Mark D. Lerner
                                      ------------------------------------------
                                  Name:  Mark D. Lerner
                                  Title: Vice President

Date: February 14, 2005           CHESAPEAKE PARTNERS INTERNATIONAL LTD.

                                  By: Chesapeake Partners Management Co., Inc.
                                      As Investment Manager

                                  By: /s/ Mark D. Lerner
                                      ------------------------------------------
                                  Name:  Mark D. Lerner
                                  Title: Vice President

Date: February 14, 2005           BARCLAYS GLOBAL INVESTORS EVENT DRIVEN FUND II

                                  By: Chesapeake Partners Management Co., Inc.
                                      As Investment Manager

                                  By: /s/ Mark D. Lerner
                                      ------------------------------------------
                                  Name:  Mark D. Lerner
                                  Title: Vice President



                                                             Page 12 of 13 Pages

                                 EXHIBIT INDEX


Ex.                                                                     Page No.
---                                                                     --------

A.   Joint Filing Agreement, dated February 14, 2005 by and among
     Chesapeake Partners Management Co., Inc., Chesapeake Partners
     Limited Partnership, Chesapeake Partners Institutional Fund
     Limited Partnership, Chesapeake Partners International Ltd.,
     and Barclays Global Investors Event Driven Fund II..............         13



                                                             Page 13 of 13 Pages

                                   EXHIBIT A

                            JOINT FILING AGREEMENT

     The  undersigned  hereby  agree that the  statement  on  Schedule  13G with
respect to the Common Stock of Gentek Inc. dated as of February 14, 2005 is, and
any amendments thereto (including  amendments on Schedule 13D) signed by each of
the  undersigned  shall be,  filed on behalf  of each of us  pursuant  to and in
accordance  with the provisions of Rule 13d-1(k)  under the Securities  Exchange
Act of 1934, as amended.

Date: February 14, 2005           CHESAPEAKE PARTNERS MANAGEMENT CO., INC.

                                  By: /s/ Mark D. Lerner
                                      ------------------------------------------
                                  Name:  Mark D. Lerner
                                  Title: Vice President

Date: February 14, 2005           CHESAPEAKE PARTNERS LIMITED PARTNERSHIP

                                  By: Chesapeake Partners Management Co., Inc.
                                      As General Partner

                                  By: /s/ Mark D. Lerner
                                      ------------------------------------------
                                  Name:  Mark D. Lerner
                                  Title: Vice President

Date: February 14, 2005           CHESAPEAKE PARTNERS INSTITUTIONAL FUND LIMITED
                                  PARTNERSHIP

                                  By: Chesapeake Partners Management Co., Inc.
                                      As General Partner

                                  By: /s/ Mark D. Lerner
                                      ------------------------------------------
                                  Name:  Mark D. Lerner
                                  Title: Vice President

Date: February 14, 2005           CHESAPEAKE PARTNERS INTERNATIONAL LTD.

                                  By: Chesapeake Partners Management Co., Inc.
                                      As Investment Manager

                                  By: /s/ Mark D. Lerner
                                      ------------------------------------------
                                  Name:  Mark D. Lerner
                                  Title: Vice President

Date: February 14, 2005           BARCLAYS GLOBAL INVESTORS EVENT DRIVEN FUND II

                                  By: Chesapeake Partners Management Co., Inc.
                                      As Investment Manager

                                  By: /s/ Mark D. Lerner
                                      ------------------------------------------
                                  Name:  Mark D. Lerner
                                  Title: Vice President