<PAGE>

                                                                   EXHIBIT 10.11

                           BARRIER THERAPEUTICS, INC.

                       RESTRICTED STOCK PURCHASE AGREEMENT

         THIS AGREEMENT is made as of August 1, 2002 by and between BARRIER
THERAPEUTICS, INC., a Delaware corporation (the "Company") and Anne M. VanLent
(the "Purchaser").

         The parties agree as follows:

         1.       Sale of Stock. The Company hereby agrees to sell to the
Purchaser and the Purchaser hereby agrees to purchase an aggregate of 200,000
shares of the Company's Common Stock, par value $0.0001 per share at a purchase
price of $.30 per share (the "Shares"), for an aggregate purchase price of
$60,000.00 (the "Purchase Price").

         2.       Payment of Purchase Price. The payment of the purchase price
shall be by cash, check, by promissory note in a form approved by the Board
of Directors of the Company or compensation committee thereof or any
combination thereof. The Company acknowledges payment by the Purchaser for the
Shares of $20.00 in cash (representing par value of the shares at $0.0001 per
share) and $59,980 via a promissory note between the Purchaser and the Company
dated August 1, 2002. The purchase price is equal to the Fair Market Value (as
defined in the Company's Equity Compensation Plan) of the Shares on the date of
purchase.

         3.       Repurchase Option.

                  (a)      Subject to the provisions of Section 4 below, in the
event of any voluntary or involuntary termination of Purchaser's employment by,
or services to, the Company for any or no reason (including death or disability)
before all of the Shares are released from the Company's Repurchase Option (as
defined below), the Company shall, upon the date of such termination (as
reasonably fixed and determined by the Company), have an irrevocable, exclusive
option, but not the obligation, for a period of ninety (90) days from such date
to repurchase all or any portion of the unreleased Shares (pursuant to Section
4) at such time (the "Repurchase Option") at the original purchase price per
share (the "Repurchase Price"). The Repurchase Option shall be exercisable by
the Company by written notice to the Purchaser or the Purchaser's executor and
shall be exercisable, at the Company's option (i) by delivery to the Purchaser
or the Purchaser's executor with such notice of a check in the amount of the
purchase price for the Shares being repurchased, (ii) by cancellation by the
Company of an amount of the Purchaser's indebtedness, if any, to the Company
equal to the purchase price for the Shares being repurchased or (iii) by a
combination of (i) and (ii) so that the combined payment and cancellation of
indebtedness equals the Repurchase Price times the number of shares to be
repurchased (the "Aggregate Repurchase Price"). Upon delivery of such notice and
the payment of the Aggregate Repurchase Price in any of the ways described
above, the Company shall become the legal and beneficial owner of the Shares
being repurchased and all rights and interests therein or relating thereto, and
the Company shall have the right to retain and transfer to its own name the
number of Shares being repurchased by the Company. The Repurchase Option set
forth in this Section may be assigned by the Company in whole or in part in its
sole and unfettered discretion.

<PAGE>

                  (b)      In the event of any stock dividend, stock split,
recapitalization or other change affecting the Company's outstanding common
stock as a class effected without receipt of consideration, then any new,
substituted or additional securities or other property (including money paid
other than as a regular cash dividend) which is by reason of any such
transaction distributed with respect to the Shares shall be immediately subject
to the Repurchase Option, but only to the extent the Shares are at the time
covered by such right. Appropriate adjustments to reflect the distribution of
such securities or property shall be made to the number of Shares hereunder and
to the price per share to be paid upon the exercise of the Repurchase Option in
order to reflect the effect of any such transaction upon the Company's capital
structure; provided, however, that the aggregate Purchase Price shall remain the
same.

         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
                             DATE                                     ARE RELEASED FROM THE 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>

         Notwithstanding anything to the contrary, in the event that the
Purchaser's employment with the Company is terminated (i) as a result of his or
her Disability (as defined in the Employment Agreement dated the date hereof
between the Company and the Purchaser (the "Employment Agreement")) or (ii) as a
result of his or her death or termination of employment by the Company without
Cause (as defined in the Employment Agreement), the Repurchase Option shall
apply solely with respect to seventy five percent (75%), in the case of clause
(i), and fifty percent (50%), in the case of clause (ii), of the shares that
have not been released from the Repurchase Option as of the Termination Date (as
defined in the Employment Agreement).

         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.

         5.       Restriction on Transfer. None of the Shares or any beneficial
interest therein shall be transferred, encumbered or otherwise disposed of in
any manner until the release of such Shares from the Repurchase Option in
accordance with the provisions of this Agreement.

         6.       Company's Right of First Refusal. Before any Shares held by
Purchaser or any transferee (either being sometimes referred to herein as the
"Holder") may be sold or otherwise transferred (including transfer by gift or
operation of law), the Company or its assignee(s) shall have a right of first
refusal to purchase the Shares on the terms and conditions set forth in this
Section (the "Right of First Refusal").

                                      - 2 -
<PAGE>

                  (a)      Notice of Proposed Transfer. The Holder of the Shares
shall deliver to the Company a written notice (the "Notice") stating: (i) the
Holder's bona fide intention to sell or otherwise transfer such Shares; (ii) the
name of each proposed purchaser or other transferee ("Proposed Transferee");
(iii) the number of Shares to be transferred to each Proposed Transferee (the
"Offered Shares"); and (iv) the bona fide cash price or other consideration for
which the Holder proposes to transfer the Shares (the "Offered Price"), and the
Holder shall offer the Shares at the offered Price to the Company or its
assignee(s).

                  (b)      Exercise of Right of First Refusal. At any time
within thirty (30) days after receipt of the Notice, the Company and/or its
assignee(s) may, by giving written notice to the Holder, elect to purchase all
or any of the Offered Shares proposed to be transferred to any one or more of
the Proposed Transferees, at the purchase price determined in accordance with
subsection (c) below.

                  (c)      Purchase Price. The purchase price ("Purchase Price")
for the Offered Shares purchased by the Company or its assignee(s) under this
Section shall be the Offered Price. If the Offered Price includes consideration
other than cash, the cash equivalent value of the non-cash consideration shall
be determined by the Board of Directors of the Company in good faith.

                  (d)      Payment. Payment of the Purchase Price shall be made,
at the option of the Company or its assignee(s), in cash (by check), by
cancellation of all or a prior of any outstanding indebtedness of the Holder to
the Company (or, in the case of repurchase by an assignee, to the assignee), or
by any combination thereof within thirty (30) days after receipt of the Notice
or in the manner and at the times set forth in the Notice.

                  (e)      Holder's Right to Transfer. If all of the Offered
Shares proposed in the Notice to be transferred to a given Proposed Transferee
are not purchased by the Company and/or its assignee(s) as provided in this
Section 6, then the Holder may sell or otherwise transfer such Offered Shares or
the remaining Offered Shares to that Proposed Transferee at the Offered Price or
at a higher price, provided that such sale or other transfer is consummated
within forty-five (45) days after the date of the Notice, that any such sale or
other transfer is effected in accordance with any applicable securities laws and
that the Proposed Transferee agrees in writing that the provisions of this
Section shall continue to apply to the Offered Shares purchased by such Proposed
Transferee. If the Offered Shares described in the Notice are not transferred to
the Proposed Transferee within such period, a new Notice shall be given to the
Company, and the Company and/or its assignees shall again be offered the Right
of First Refusal before any Shares held by the Holder may be sold or otherwise
transferred.

                  (f)      Exception for Certain Transfers. Notwithstanding
anything to the contrary contained in this Section 6, the Company's right of
first refusal shall not be applicable provided the Purchaser receives prior
written consent from the Company to (i) a gratuitous transfer of the Shares made
to the Purchaser's spouse or issue, including adopted children, or to a trust
for the exclusive benefit of the Purchaser or the Purchaser's spouse or issue,
(ii) a transfer of title to the Shares effected pursuant to the Purchaser's will
or the laws of intestate succession or (iii) a transfer to the Company in pledge
as security for any purchase-money indebtedness incurred by the Purchaser in
connection with the acquisition of the Shares.

                                      - 3 -
<PAGE>

                  (g)      Termination of Right of First Refusal. The Right of
First Refusal shall terminate as to any Shares upon the first sale of Common
Stock of the Company to the general public pursuant to a registration statement
filed with and declared effective by the Commission under the Securities Act of
1933, as amended (the "Securities Act").

                  (h)      Opinion of Counsel. If requested by the Company,
Purchaser shall provide the Company an opinion of counsel in form and substance
satisfactory to the Company, that (i) the proposed disposition does not require
registration of such transferred Shares under the Securities Act or (ii) all
appropriate action necessary for compliance with the registration requirements
of the Securities Act or of any exemption from registration available under the
Securities Act (including Rule 144) has been taken.

                  (i)      Non-Compliance. The Company shall not be required (i)
to transfer on its books any Shares that have been sold or transferred in
violation of the provisions of this Section 6 or (ii) to treat as the owner of
such transferred Shares, or otherwise to accord voting or dividend rights to,
any transferee to whom such Shares have been transferred in contravention of
this Agreement.

                  (j)      Recapitalization.

                           (i)      In the event of any stock dividend, stock
split, recapitalization or other transaction affecting the Company's outstanding
common stock as a class effected without receipt of consideration, then any new,
substituted or additional securities or other property which is by reason of
such transaction distributed with respect to the Shares shall be immediately
subject to the Company's First Refusal Right hereunder, but only to the extent
the Shares are at a time covered by such right.

                           (ii)     In the event of a change of control of the
Company, the Company's First Refusal Right shall remain in full force and effect
and shall apply to the new capital stock or other property received in exchange
for the Shares in consummation of such change of control, but only to the extent
the Shares are at the time covered by such right.

         7.       Investment Representations. In connection with purchase of the
Shares, the Purchaser represents to the Company the following:

                  (a)      The Purchaser is aware of the Company's business
affairs and financial condition and has acquired sufficient information about
the Company to reach an informed and knowledgeable decision to acquire the
Shares. The Purchaser is purchasing the Shares for investment for the
Purchaser's own account only and not with a view to, or for resale in connection
with, any "distribution" thereof within the meaning of the Securities Act.

                  (b)      The Purchaser understands that the Shares have not
been registered under the Securities Act by reason of a specific exemption
therefrom, which exemption depends upon, among other things, the bona fide
nature of the Purchaser's investment intent as expressed herein. In this
connection, the Purchaser understands that, in view of the Securities and
Exchange Commission ("Commission"), the statutory basis for such exemption may
not be present if the Purchaser's representations meant that the Purchaser's
present intention was to hold the Shares for a minimum capital gains period
under applicable tax statutes, for a deferred

                                      - 4 -
<PAGE>

sale, for a market rise, for a sale if the market does not rise, or for a year
or any other fixed period in the future.

                  (c)      Purchaser is an executive officer of the Company or
otherwise an Accredited Investor within the definition set forth in Rule 501(a)
of the Securities Act. Purchaser has been given, at a reasonable time prior to
the Closing, an opportunity to ask questions and receive answers concerning the
terms and conditions of the investment in the Shares. Purchaser further
acknowledges and understands that the Shares must be held indefinitely unless
they are subsequently registered under the Securities Act or an exemption from
such registration is available. Purchaser further acknowledges and understands
that the Company is under no obligation to register the Shares. Purchaser
understands that the certificate evidencing the Shares will be imprinted with a
legend which prohibits the transfer of the Shares unless they are registered or
such registration is not required in the opinion of counsel satisfactory to the
Company.

                  (d)      Purchaser is a resident in the state set forth on the
signature page below Purchaser's name.

                  (e)      Purchaser has the requisite power and authority to
enter into this Agreement and to carry out its obligations hereunder. The
execution, delivery and performance of this Agreement by Purchaser has been duly
and validly authorized and no other proceedings on its part are necessary to
authorize this Agreement or the transactions contemplated hereby. This Agreement
is a valid and binding agreement of Purchaser, enforceable against such
Purchaser in accordance with its terms except as may be limited by bankruptcy
and insolvency laws and by other laws affecting the rights of creditors
generally and except as may be limited by the availability of equitable remedies
and except as rights of indemnity or contribution may be limited by federal or
state securities or other laws or the public policy underlying such laws. The
execution and delivery of this Agreement does not and consummation of the
transactions contemplated hereby, will not, result in or constitute (i) a
default, breach or violation of any agreement or governing documents, as the
case may be, to which Purchaser is a party or by which Purchaser may be bound,
or (ii) a violation of any statute, rule, regulation, order, judgment or decree
of any court, public body or authority, which violation would have a material
adverse effect on Purchaser.

                  (f)      Purchaser acknowledges that (i) its investment in the
Shares is speculative and involves a high degree of risk, (ii) it has such
knowledge and experience in financial and business matters as is necessary to
enable it to evaluate the merits and risks of an investment in the Shares, and
(iii) it has no present need for liquidity in their investment in the Shares and
are able to bear the risk of that investment for an indefinite period and to
afford a complete loss thereof.

         8.       Stock Certificate Legends. The share certificate evidencing
the Shares issued hereunder shall be endorsed with the following legends:

                  (a)      THE SHARES REPRESENTED BY THIS CERTIFICATE HAVE BEEN
ACQUIRED FOR INVESTMENT AND NOT WITH A VIEW TO, OR IN CONNECTION WITH, THE SALE
OR DISTRIBUTION THEREOF. NO SUCH SALE OR DISPOSITION

                                      - 5 -
<PAGE>

MAY BE EFFECTED WITHOUT AN EFFECTIVE REGISTRATION STATEMENT RELATED THERETO OR
AN OPINION OF COUNSEL SATISFACTORY TO THE COMPANY THAT SUCH REGISTRATION IS NOT
REQUIRED UNDER THE SECURITIES ACT OF 1933.

                  (b)      THE SHARES REPRESENTED BY THIS CERTIFICATE MAY BE
TRANSFERRED ONLY IN ACCORDANCE WITH THE TERMS OF AN AGREEMENT BETWEEN THE
COMPANY AND THE STOCKHOLDER, A COPY OF WHICH IS ON FILE WITH THE SECRETARY OF
THE COMPANY.

                  (c)      Any legend required by any applicable state
securities laws.

         9.       Market Stand-Off Agreement.

                  (a)      The Purchaser hereby agrees, if so requested by the
managing underwriters or the Company in connection with the initial public
offering of the Company's Common Stock, that, without the prior written consent
of such managing underwriters, the Purchaser will not offer, sell, contact to
sell, grant any option to purchase, make any short sale or otherwise dispose of,
assign any legal or beneficial interest in or make a distribution of any capital
stock of the Company held by or on behalf of the Purchaser or beneficially owned
by the Purchaser in accordance with the rules and regulations of the Securities
and Exchange Commission for a period of up to one hundred eighty (180) days
after the date of the final prospectus relating to the Company's initial public
offering.

                  (b)      In the event of any stock dividend, stock split,
split, recapitalization, or other change affecting the Company's outstanding
common stock effected without receipt of consideration, then any new,
substituted, or additional securities distributed with respect to the Shares
shall be immediately subject to the provisions of this Section 9, to the same
extent the Shares are at such time covered by such provisions.

                  (c)      In order to enforce the provisions of this Section 9,
the Company may impose stop-transfer instructions with respect to the Shares
until the end of the applicable stand-off period.

         10.      Adjustment for Stock Split. All references to the number of
Shares and the purchase price of the Shares in this Agreement shall be
appropriately adjusted to reflect any stock split, reverse stock split or stock
dividend or other similar change in the Shares which may be made by the Company
after the date of this Agreement.

         11.      Tax Consequences. The Purchaser has reviewed with the
Purchaser's own tax advisors the federal, state, local and foreign tax
consequences of this investment and the transactions contemplated by this
Agreement. The Purchaser is relying solely on such advisors and not on any
statements or representations of the Company or any of its agents., The
Purchaser understands that the Purchaser (and not the Company) shall be
responsible for the Purchaser's own tax liability that may arise as a result of
this investment or the transactions contemplated by this Agreement. The
Purchaser understands that Section 83 of the Internal Revenue Code of 1986, as
amended (the "Code"), taxes as ordinary income both (i) the difference between
the fair market value of the Shares when the Company granted the Purchaser

                                      - 6 -
<PAGE>

the right to purchase the Shares and the fair market value of the Shares on the
date of this Agreement and (ii) the difference between the amount paid for the
Shares and the fair market value of the Shares as of the date any restrictions
on the Shares lapse. In this context, "restriction" includes the right of the
Company to buy back the Shares pursuant to its repurchase option. In the event
the Company has registered under the Securities Exchange Act of 1934, as amended
(the "Exchange Act"), "restriction" with respect to officers, directors and 10%
stockholders also means the period after the purchase of the Shares during which
such officers, directors and 10% stockholder could be subject to suit under
Section 16(b) of the Exchange Act. The Purchaser understands that the Purchaser
may elect to be taxed at the time the Shares are purchased rather than when and
as the Company's repurchase option or 16(b) period expires by filing an election
under Section 83(b) of the Code with the IRS within thirty (30) days from the
date of purchase. The form for making this election is attached as Exhibit A
hereto.

         THE PURCHASER ACKNOWLEDGES THAT IT IS THE PURCHASER'S SOLE
RESPONSIBILITY AND NOT THE COMPANY'S TO TIMELY FILE THE ELECTION UNDER SECTION
83(b), EVEN IF THE PURCHASER REQUESTS THE COMPANY OR ITS REPRESENTATIVES TO MAKE
THIS FILING ON THE PURCHASER'S BEHALF.

         12.      General Provisions.

                  (a)      This Agreement shall be governed by the laws of the
Sate of New Jersey. This Agreement represents the entire agreement between the
parties with respect to the purchase of Common Stock by the Purchaser and may
only be modified or amended in writing signed by both parties.

                  (b)      Any notice, demand or request required or permitted
to be given by either the Company or the Purchaser pursuant to the terms of this
Agreement shall be in writing and shall be deemed given when delivered
personally or deposited in the U.S. mail, first Class with postage prepaid, and
addressed to the parties at the addresses of the parties set forth at the end of
this Agreement or such other address as a party may request by notifying the
other in writing.

                  (c)      The rights and benefits of the Company under this
Agreement shall be transferable to any one or more persons or entities, and all
covenants and agreements hereunder shall inure to the benefit of, and be
enforceable by the Company's successors and assigns. The rights and obligations
of the Purchaser under this Agreement may only be assigned with the prior
written consent of the Company and any purported transfer otherwise shall be
null and void.

                  (d)      Either party's failure to enforce any provision or
provisions of this Agreement shall not in any way be construed as a wavier of
any such provision or provisions, nor prevent that that party thereafter from
enforcing each and every other provision of this Agreement. The rights granted
both parties herein are cumulative and shall not constitute a waiver of either
party's right to assert all other legal remedies available to it under the
circumstances.

                  (e)      The Purchaser agrees upon request to execute any
further documents or instruments necessary or desirable to carry out the
purposes or intent of this Agreement.

                                      - 7 -
<PAGE>

                  (f)      PURCHASER ACKNOWLEDGES AND AGREES THAT THE LAPSING OF
THE REPURCHASE OPTION PURSUANT TO SECTION 4 HEREOF IS EARNED ONLY BY CONTINUING
SERVICE AS AN AT-WILL EMPLOYEE OF, OR SERVICE PROVIDER TO, THE COMPANY (AND NOT
THROUGH THE ACT OF BEING HIRED OR PURCHASING SHARES HEREUNDER). PURCHASER
FURTHER ACKNOWLEDGES AND AGREES THAT THIS AGREEMENT, THE TRANSACTIONS
CONTEMPLATED HEREUNDER AND THE REPURCHASE OPTION SCHEDULE SET FORTH HEREIN DO
NOT CONSTITUTE AN EXPRESS OR IMPLIED PROMISE OF CONTINUED ENGAGEMENT AS AN
EMPLOYEE OR SERVICE PROVIDER FOR SUCH PERIOD, FOR ANY PERIOD OR AT ALL, AND
SHALL NOT INTERFERE WITH THE COMPANY'S RIGHT TO TERMINATE PURCHASER'S EMPLOYMENT
OR SERVICE RELATIONSHIP AT ANY TIME, WITH OR WITHOUT CAUSE.

                  (g)      Purchaser has reviewed this Agreement in its
entirety, has had an opportunity to obtain the advice of counsel prior to
executing this Agreement and fully understands all provisions of this Agreement.

                            [SIGNATURE PAGE FOLLOWS]

                                      - 8 -
<PAGE>

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

BARRIER THERAPEUTICS, INC.                    PURCHASER(1)
a Delaware corporation

By: /s/ Geert Cauwenbergh                     By: /s/ Anne M. VanLent
    ----------------------------------------      ------------------------------
        Name: Geert Cauwenbergh                       Anne M. VanLent
        Title: Chief Executive Officer

Address:                                      Address:

                  100 Overlook Center                    33 Governor's Lane
                  Suite 200                              Princeton, NJ  08540
                  Princeton, NJ  08540

--------
(1) I have received the I.R.C. Section 83(b) election that was attached hereto
as Exhibit A. As set forth in Section 11, I understand that I, and not the
Corporation, will be responsible for completing the form and filing the election
with the appropriate office of the federal and state tax authorities and that if
such filing is not completed within thirty (30) days after the date of this
Agreement, I will forfeit the significant tax benefits of Section 83(b). I
understand further that such filing should be made by registered or certified
mail, return receipt requested, and that I must retain two (2) copies of the
completed form for filing with my state and federal tax returns for the current
tax year and an additional copy for my records.

                                      - 9 -
<PAGE>

                                    EXHIBIT A

                             SECTION 83(b) ELECTION

This election is being made under Section 83(b) of the Internal Revenue Code of
1986, as amended, pursuant to Treasury Regulation Section 1.83-2.

         (1)      Name of taxpayer making election: Anne M. VanLent

                  Address: 33 Governor's Lane
                           Princeton, NJ  08540
                  Social Security Number: _______________________________

                  Tax Year for which election is being made: ____________

         (2)      The property with respect to which the election is being made
consists of 200,000 shares of common stock of Barrier Therapeutics, Inc., a
Delaware corporation (the "Common Stock").

         (3)      Date the property was transferred: June 20, 2002.

         (4)      Forfeiture provision: The stock is subject to repurchase by
the Company if the taxpayer ceases to be employed by the Company during the
restriction period. The restriction period lapses according to the following
schedule:

<TABLE>
<CAPTION>
                                                                     PERCENTAGE OF SHARES FOR WHICH THE SHARES
                             DATE                                     ARE RELEASED FROM THE REPURCHASE OPTION
--------------------------------------------------------------------------------------------------------------
<S>                                                                  <C>
                         July 1, 2002                                                   8.33%
--------------------------------------------------------------------------------------------------------------
                        August 1, 2002                                                  8.33%
--------------------------------------------------------------------------------------------------------------
                       September 1, 2002                                                8.33%
--------------------------------------------------------------------------------------------------------------
                       September 1, 2003                                               18.75%
--------------------------------------------------------------------------------------------------------------
Monthly beginning on September 30, 2003 through April 30, 2006                        1.8145%
</TABLE>

         (5)      The fair market value at the time of the transfer of the stock
(determined without regard to any restriction other than a restriction which by
its terms will never lapse) is $.30 per share.

         (6)      The amount paid for the stock is $.30 per share ($60,000
aggregate consideration).

         (7)      A copy of this statement has been furnished to the Company.

         (8)      This statement is executed as of June __, 2002.

______________________________                     _____________________________
Taxpayer                                           Spouse (if applicable)