UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549

                                    FORM 8-K

                                 CURRENT REPORT
                     Pursuant to Section 13 or 15(d) of the
                         Securities Exchange Act of 1934

       Date of Report (Date of earliest event reported): January 12, 2006

                           DUSA PHARMACEUTICALS, INC.
             (Exact name of registrant as specified in its charter)

                    


                                                           
 NEW JERSEY                0-19777                            22-3103129
(State or other         (Commission File                     (IRS Employer
jurisdiction of             Number)                          Identification 
incorporation)                                                  Number)                                



                                 25 UPTON DRIVE
                         WILMINGTON, MASSACHUSETTS 01887
          (Address of principal executive offices, including ZIP code)

                                 (978) 657-7500
              (Registrant's telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to
simultaneously satisfy the filing obligation of the registrant under any of the
following provisions (see General Instruction A.2. below):

[ ]   Written communications pursuant to Rule 425 under the Securities Act (17
      CFR 230.425)

[ ]   Soliciting material pursuant to Rule 14a-12 under the Securities Act (17
      CFR 240.14a-12)

[ ]   Pre-commencement communications pursuant to Rule 14d-2(b) under the
      Exchange Act (17 CFR 240.14d-2(b))

[ ]   Pre-commencement communications pursuant to Rule 13e-4(c) under the
      Exchange Act (17 CFR 240.13e-4(c))



ITEM 1.01 - ENTRY INTO A MATERIAL DEFINITIVE AGREEMENT.

      DUSA Pharmaceuticals, Inc. ("DUSA") issued a press release on January 18,
2006, attached to and made a part of this report as Exhibit 99, announcing that
it had entered into an exclusive Marketing, Distribution and Supply Agreement
(the "Agreement") with Stiefel Laboratories, Inc. ("Stiefel") covering current
and future uses of DUSA's proprietary Levulan(R) Kerastick(R) for photodynamic
therapy (PDT) in dermatology. The Agreement, dated January 12, 2006, grants
Stiefel an exclusive right to distribute, promote and sell the Levulan(R)
Kerastick(R) in the western hemisphere from south of and including Mexico and
all other countries in the Caribbean, excluding United States territories
(collectively, the "Territory"). DUSA will manufacture and supply to Stiefel on
an exclusive basis in the Territory all of Stiefel's reasonable requirements for
the product.

      The Agreement, which has an initial term of ten years, will expand the
distribution of Levulan(R) beyond the North American market for the first time
into Mexico, Central and South America. DUSA has completed its portion of the
Brazilian regulatory submission for the use of Levulan PDT for actinic
keratoses. Effective with the signing of the Agreement, Stiefel will complete
final integration and submission of the data to the Brazilian regulatory agency
with market launch expected in late 2006 or early 2007. Stiefel will prepare and
file the regulatory applications in other countries in the Territory subject to
the terms of the Agreement. The parties have certain rights to terminate the
Agreement prior to the end of the initial term, and Stiefel has an option to
extend the term for an additional ten years on mutually agreeable terms and
conditions.

      Under the terms of the Agreement, Stiefel will make up to $3,000,000 in
milestone payments to DUSA based upon receipt of final pricing approval of the
Levulan(R) Kerastick(R) from Brazilian regulatory authorities and achievement of
pre-determined minimum purchase levels in the Territory, subject to certain
terms and conditions. The selling price per unit of the Levulan(R) Kerastick(R)
is a percentage of Stiefel's final selling price to unrelated third parties.
DUSA has the right to suspend the supply of the product if the unit price DUSA
receives falls below certain levels. DUSA will manufacture the Kerastick(R) for
Stiefel at its manufacturing facility in Wilmington, Massachusetts.

      Except for historical information, this report, including the attached
press release, contains certain forward-looking statements that involve known
and unknown risk and uncertainties, which may cause actual results to differ
materially from any future results, performance or achievements expressed or
implied by the statements made. These forward-looking statements relate to
expansion of the distribution of the product, completion of the regulatory
submission and expectation for launch, Stiefel's preparation and completion of
regulatory submissions in other countries, receipt of milestone payments, DUSA's
obligation to manufacture in Wilmington, Massachusetts, and Stiefel's beliefs
regarding sales and profits. Furthermore, the factors that may cause differing
results include the uncertainties of the regulatory process, including pricing
approval, product development risks, reliance on third party manufacturers, and
other risks identified in DUSA's SEC filings from time to time.


ITEM 9.01 - FINANCIAL STATEMENT AND EXHIBITS.




                     
Item No.            Description

99                Press Release, dated January 18, 2006




                                   SIGNATURES


      Pursuant to the requirements of the Securities Exchange Act of 1934,
the Registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.



                                       DUSA PHARMACEUTICALS, INC.



Dated: January 18, 2006                     By: /s/ D. Geoffrey Shulman
                                                --------------------------------
                                                D. Geoffrey Shulman, MD, FRCPC
                                                Chairman of the Board and Chief
                                                Executive Officer





                                  EXHIBIT INDEX


              
Item No.        Description

99              Press Release, dated January 18, 2006