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                                                                   EXHIBIT 10.20

                                 AMENDMENT NO. 1
                                     TO THE
                       RESTRICTED STOCK PURCHASE AGREEMENT

         This Amendment No. 1 (this "Amendment") to the Restricted Stock
Purchase Agreement, dated as of August 1, 2002 (the "Restricted Stock Purchase
Agreement"), is entered into effective as of April 1, 2004, by and between
Barrier Therapeutics, Inc., a Delaware corporation (the "Company"), and Anne M.
VanLent (the "Purchaser"). Capitalized terms used herein and not otherwise
defined shall have the meanings given to them in the Restricted Stock Purchase
Agreement.

                                    RECITALS:

         WHEREAS, the Company agreed to sell and the Purchaser agreed to
purchase shares of the Company's common stock, par value of $.0001 per share
(the "Common Stock"), pursuant to that certain Restricted Stock Purchase
Agreement; and

         WHEREAS, contemporaneously with the execution of this Amendment, the
Company and the Purchaser have entered into a new employment agreement (the
"Employment Agreement"); and

         WHEREAS, the Company's Compensation Committee has determined to make
certain amendments to the Restricted Stock Purchase Agreement and the Common
Stock issued thereunder (the "Shares") to be consistent with the terms of the
Employment Agreement; and

         WHEREAS, this Amendment shall be effective upon execution by the
Company and the Purchaser.

         NOW THEREFORE, in consideration of the mutual covenants herein, and
intending to be legally bound hereby, the parties agree as follows:

1.       Section 4 of the Restricted Stock Purchase Agreement is hereby amended
in its entirety to read as follows:

         "4.      Release of Shares From Repurchase Option. The Shares shall be
released from the Repurchase Option as follows:

<TABLE>
<CAPTION>
                                                                                PERCENTAGE OF SHARES FOR WHICH THE
                                                                                   SHARES ARE RELEASED FROM THE
                           DATE                                                         REPURCHASE OPTION
--------------------------------------------------------------                  ----------------------------------
<S>                                                                             <C>
August 1, 2002                                                                                 16.66%

September 1, 2002                                                                               8.33%

September 1, 2003                                                                              18.75%

Monthly beginning on September 30, 2003 through April 30, 2006                                1.8145%
</TABLE>

                  In the event that the Purchaser is terminated by the Company
         without Cause (as defined in the Employment Agreement) or the Purchaser
         terminates employment with the Company for Good Reason (as defined in
         the Employment Agreement), the Shares shall be released from the

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         Repurchase Option on the Termination Date for the period of employment
         plus the Purchaser's Severance Period (as defined in the Employment
         Agreement), and all other Shares may be repurchased by the Company
         pursuant to Section 3 hereof.

                  In the event of the Purchaser's death or Disability (as
         defined in the Employment Agreement), all Shares shall be released from
         the Repurchase Option.

                  In the event of a Change of Control (as defined in the
         Employment Agreement), all Shares shall be released from the Repurchase
         Option.

                  The release of shares from the Repurchase Option is
         cumulative, but shall not exceed 100%. If the foregoing schedule would
         produce fractional Shares, the number of Shares for which the
         Repurchase Option is released shall be rounded down to the nearest
         whole Share."

2.       Except as specifically amended herein, all terms and conditions
contained in the Restricted Stock Purchase Agreement shall remain in full force
and effect. To the extent there is any conflict between the Restricted Stock
Purchase Agreement and this Amendment, the terms of this Amendment shall
prevail.

3.       This Amendment shall be governed by and construed under the laws of the
State of New Jersey as applied to agreements among New Jersey residents entered
into and to be performed entirely within New Jersey.

4.       This Amendment may be executed in any number of counterparts, each of
which shall be an original, but both of which together shall constitute one
instrument.

                                       -2-
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         IN WITNESS WHEREOF, the undersigned parties have executed this
Amendment to the Restricted Stock Purchase Agreement as of the date set forth in
the first paragraph hereof.

                                           BARRIER THERAPEUTICS, INC.

                                           By: /s/ Geert Cauwenbergh
                                               _________________________________
                                           Name: Geert Cauwenbergh
                                           Title:Chief Executive Officer

                                           PURCHASER:

                                           /s/ Anne M. VanLent
                                           -------------------------------------
                                           Anne M. VanLent

                        SIGNATURE PAGE TO AMENDMENT NO. 1
                   TO THE RESTRICTED STOCK PURCHASE AGREEMENT