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Auxilium Pharmaceuticals, Inc. Submits Supplemental Biologics License Application To The FDA For XIAFLEX® For The Treatment Of Peyronie's Disease

About the IMPRESS Clinical ProgramAuxilium's late stage global development plan for XIAFLEX consists of four clinical studies and is known by the acronym IMPRESS – The Investigation for Maximal Peyronie's Reduction Efficacy and Safety Studies.  There are two randomized, double-blind, placebo-controlled phase III studies, which enrolled over 800 patients combined at 64 sites in the U.S. and Australia in less than five months, with a 2:1 ratio of XIAFLEX to placebo.  There is also one open label study, which enrolled at least 250 patients, at approximately 30 sites in the U.S., EU and New Zealand, and one pharmacokinetic study, which enrolled approximately 20 patients who were then enrolled into the open label study.  XIAFLEX was administered two times a week every six weeks for up to four treatment cycles (2 x 4).  Each treatment cycle was followed by a penile modeling procedure.  Patients were followed for 52 weeks post-first injection in the double-blind studies and were followed for 36 weeks in the open label and pharmacokinetic trials. 

The trials' co-primary endpoints are percent improvement from baseline in penile curvature deformity compared to placebo and the change from baseline (improvement) in the PD bother domain of the PDQ compared to placebo.  The PDQ also has two additional domains as secondary endpoints, which include severity of psychological and physical symptoms of PD, and penile pain.  Safety measurements include adverse event monitoring and clinical labs.  Immunogenicity testing was also performed. 

About the IMPRESS PDQThe PDQ is a 15-question assessment of the impact of PD on a subject using 3 domains: PD bother, psychological and physical symptoms of PD, and penile pain (administered at screening, week 24, and week 52).  The PDQ is a proprietary questionnaire that Auxilium developed with the FDA, starting in 2004, and evolved through the XIAFLEX clinical PD studies into a validated tool for measuring PD bother.

About XIAFLEXXIAFLEX (collagenase clostridium histolyticum or CCH) is a biologic approved in the U.S., EU and Canada for the treatment of adult Dupuytren's contracture (DC) patients with a palpable cord. XIAFLEX is a minimally invasive treatment for this condition and consists of a highly purified combination of two subtypes of collagenase, derived from Clostridium histolyticum, in specific proportion.  Together, the collagenase sub-types work synergistically to break the bonds of the triple helix collagen structure more effectively than human collagenase.  A sBLA for XIAFLEX for the treatment of Peyronie's disease has been submitted to the FDA.  Additionally, CCH is in phase IIa of development for the treatment of Frozen Shoulder syndrome (adhesive capsulitis) and in phase Ib of development for the treatment of cellulite (edematous fibrosclerotic panniculopathy).  XIAFLEX has been granted Orphan status in the U.S. by the FDA for DC and PD. Auxilium also has rights to pursue additional indications for CCH.

About AuxiliumAuxilium Pharmaceuticals, Inc. is a specialty biopharmaceutical company with a focus on developing and marketing products to predominantly specialist audiences.  Auxilium markets Testim® 1% (testosterone gel) for the topical treatment of hypogonadism and XIAFLEX for the treatment of adult Dupuytren's contracture patients with a palpable cord in the U.S.  GSK co-promotes Testim with Auxilium in the U.S.  Ferring International Center S.A. markets Testim in certain countries of the EU and Paladin Labs Inc. markets Testim in Canada.  Pfizer has marketing rights for XIAPEX® (the EU tradename for collagenase clostridium histolyticum) in 46 countries in Eurasia through April 24, 2013; Asahi Kasei Pharma Corporation has development and commercial rights for XIAFLEX in Japan; and Actelion Pharmaceuticals Ltd has development and commercial rights for XIAFLEX in Canada, Australia, Brazil and Mexico.    For additional information, visit

SAFE HARBOR STATEMENT UNDER THE PRIVATE SECURITIES LITIGATION REFORM ACT OF 1995 This news release contains forward-looking statements as defined by the Private Securities Litigation Reform Act of 1995, which discuss matters that are not facts, and may include words to indicate their uncertain nature such as "believe," "expect," anticipate," "intend," "plan," "should," "could," "estimate," "project," "will," and "target." Forward-looking-statements in this release include statements regarding the timing of the FDA's review of the Company's sBLA for XIAFLEX for treatment of PD, including the timing of the FDA's determination as to whether to grant Priority Review designation to the sBLA and the potential approval of the sBLA;  the size of the potential market for XIAFLEX for the treatment of PD; whether XIAFLEX will be the first and only approved biologic therapy indicated for the treatment of PD; whether XIAFLEX, if approved for the treatment of PD, has the clinical profile to become a potential breakthrough option in a therapeutic area that currently has limited effective treatment options; the interpretation of clinical data; the number of patients with PD; the Company's development of CCH for PD, Frozen Shoulder syndrome, and cellulite; and all other statements containing projections, statements of future performance or expectations, or statements of plans or objectives for future operations (including statements of assumption underlying or relating to any of the foregoing). Our forward-looking statements convey management's expectations, beliefs, plans and objectives regarding future performance of Auxilium and are based upon preliminary information and management assumptions. No specific assurances can be given with respect to whether those products for which the Company is pursuing FDA approval will be approved or whether any of the Company's products will achieve commercial success; or whether any of the Company's co-promotion agreements will be successful. While the Company may elect to update the forward-looking statements made in this news release in the future, the Company specifically disclaims any obligation to do so. Such forward-looking statements are subject to a wide range of risks and uncertainties that could cause results to differ in material respects, including those relating to product development, revenue, expense and earnings expectations, intellectual property rights, results and timing of clinical trials, success of marketing efforts, the need for additional research and testing, and the timing and content of decisions made by regulatory authorities, including the U.S. Food and Drug Administration, and those risks discussed in our reports on file with the Securities and Exchange Commission (the "SEC"). Our SEC filings may be accessed electronically by means of the SEC's home page on the Internet at or by means of the Company's home page on the Internet at under the heading "For Investors - SEC Filings." There may be additional risks that the Company does not presently know or that the Company currently believes are immaterial which could also cause actual results to differ from those contained in the forward-looking statements.

Auxilium Contacts: James E. FickenscherChief Financial Officer, Auxilium Pharmaceuticals, Inc.+1-484-321-5900 jfickenscher@auxilium.comor William Q. Sargent Jr.Vice-President, Investor Relations and Corporate Communications+1-484-321-5900

SOURCE Auxilium Pharmaceuticals, Inc.

Copyright 2011 PR Newswire. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.
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