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A.P. Pharma Clarifies Effective Date of Reverse Stock Split

REDWOOD CITY, Calif.--(BUSINESS WIRE)--May 24, 2007--A.P. Pharma, Inc. (NASDAQ:APPA), a specialty pharmaceutical company, today announced that trading of its shares on the Nasdaq Global Market will reflect the 1-for-4 reverse stock split beginning tomorrow, May 25, 2007.

Previously the company had reported that trading of the company's stock would reflect the reverse split beginning today.

About A.P. Pharma

We are a specialty pharmaceutical company focused on developing pharmaceutical products using our proprietary Biochronomer polymer-based drug delivery technology. Our product development philosophy is based on incorporating approved therapeutics into our proprietary bioerodible drug delivery technology to create controlled release pharmaceuticals to improve treatments for diseases or conditions. Our lead product candidate, APF530, is currently in a pivotal Phase 3 clinical trial for the prevention of acute and delayed onset chemotherapy-induced nausea and vomiting, or CINV.

Our primary focus is to advance our proprietary Biochronomer technology, consisting of bioerodible polymers designed to release drugs over a defined period. We have completed over 100 in vivo and in vitro studies demonstrating that our Biochronomer technology is potentially applicable to a range of therapeutic areas, including pain management, prevention of nausea and vomiting, control of inflammation and treatment of ophthalmic diseases. We have also completed comprehensive animal and human toxicology studies that have established that our Biochronomer polymers are safe and well tolerated. Furthermore, our Biochronomer technology can be designed to deliver drugs over periods varying from days to several months.

Forward-looking Statements

This news release contains "forward-looking statements" as defined by the Private Securities Reform Act of 1995. These forward-looking statements involve risks and uncertainties including uncertainties associated with the successful closing of the common stock offering, regaining compliance with NASDAQ rules, timely development, approval, launch and acceptance of new products, satisfactory completion of clinical studies, establishment of new corporate alliances, progress in research and development programs and other risks and uncertainties identified in the Company's filings with the Securities and Exchange Commission. We caution investors that forward-looking statements reflect our analysis only on their stated date. We do not intend to update them except as required by law.

CONTACT: A.P. Pharma, Inc.
Gregory Turnbull, President and Chief Executive Officer
650-366-2626
or
Investor Relations Contacts:
Lippert/Heilshorn & Associates
Don Markley, 310-691-7100
dmarkley@lhai.com

SOURCE: A.P. Pharma, Inc.