CollaGenex Pharmaceuticals to Present at the Thomas Weisel Partners Healthcare Conference 2007 on September 6th

CollaGenex Pharmaceuticals, Inc. (NASDAQ:CGPI) today announced that Nancy C. Broadbent, chief financial officer, will present at the Thomas Weisel Partners Healthcare Conference 2007. The presentation is scheduled for 3:15 p.m. EDT on Thursday, September 6, 2007 at the Four Seasons in Boston, MA. The presentation will be available as a live webcast on the Company's website at www.collagenex.com or at http://www.veracast.com/webcasts/twp/healthcare07/87212467.cfm. A replay of this presentation will be available on these websites for 30 days. About CollaGenex CollaGenex Pharmaceuticals, Inc. is a specialty pharmaceutical company currently focused on developing and marketing proprietary, innovative medical therapies to the dermatology market. In July 2006, CollaGenex launched Oracea(R), the first FDA-approved systemic product for the treatment of rosacea. CollaGenex's professional dermatology sales force also markets Pandel(R), a prescription topical corticosteroid licensed from Altana, Inc., Alcortin(R) (1% iodoquinol and 2% hydrocortisone), a prescription topical antifungal steroid combination, and Novacort(R) (2% hydrocortisone acetate and 1% pramoxine HCl), a prescription topical steroid and anesthetic. Alcortin and Novacort are marketed by the Company under a Promotion and Cooperation agreement with Primus Pharmaceuticals, Inc. CollaGenex is conducting two Phase II dose-finding studies to evaluate its second dermatology candidate, incyclinide, for the treatment of acne and rosacea, respectively. CollaGenex recently acquired the rights to develop and commercialize becocalcidiol, a patented Vitamin D analogue developed by QuatRx Pharmaceuticals Company that is currently in Phase II clinical trials for the topical treatment of mild to moderate psoriasis. Research has shown that compounds can be created by chemically modifying certain tetracyclines and that these new compounds have properties that may make them effective in treating diseases involving inflammation and/or destruction of the body's connective tissues. CollaGenex is evaluating various chemically modified tetracyclines (so called "IMPACS"(TM) compounds because they are Inhibitors of Multiple Proteases And CytokineS) to assess whether they are safe and effective in these applications. The Company has a pipeline of innovative product candidates with possible applications in dermatology and other disease states. In addition, CollaGenex has acquired the SansRosa(R) technology, which consists of a class of compounds that have shown promise in reducing the redness associated with rosacea, and the Restoraderm(R) technology, a unique, proprietary dermal drug delivery system. CollaGenex plans to leverage these platforms to develop a range of topical dermatological products with enhanced pharmacologic and cosmetic properties. To receive additional information on the Company, please visit our Website at www.collagenex.com, which does not form part of this press release. Forward Looking Statements Statements in this press release regarding management's future expectations, beliefs, intentions, goals, strategies, plans or prospects may constitute forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Forward-looking statements can be identified by terminology such as "anticipate," "believe," "could," "could increase the likelihood," "estimate," "expect," "intend," "is planned," "may," "should," "will," "will enable," "would be expected," "look forward," "may provide," "would" or similar terms, variations of such terms or the negative of those terms. Such forward-looking statements involve known and unknown risks, uncertainties and other factors including those risks, uncertainties and factors referred to in the Company's Quarterly Report on Form 10-Q for the quarter ended June 30, 2007 filed with the Securities and Exchange Commission under the section "Risk Factors," as well as other documents that may be filed by CollaGenex from time to time with the Securities and Exchange Commission. As a result of such risks, uncertainties and factors, the Company's actual results may differ materially from any future results, performance or achievements discussed in or implied by the forward-looking statements contained herein. CollaGenex is providing the information in this press release as of this date and assumes no obligations to update the information included in this press release or revise any forward-looking statements, whether as a result of new information, future events or otherwise. Restoraderm(R), SansRosa (R) and Oracea(R) are registered trademarks and IMPACS(TM) is a trademark of CollaGenex Pharmaceuticals, Inc. Novacort(R) and Alcortin(R) are trademarks of Primus Pharmaceuticals, Inc. Pandel(R) is a trademark of Taisho Pharmaceuticals. Atridox(R), Atrisorb(R) and Atrisorb-D(R) are registered trademarks of Tolmar, Inc. All other trade names, trademarks or service marks are the property of their respective owners and are not the property of CollaGenex Pharmaceuticals, Inc. or any of our subsidiaries.