Biosante to purchase $25.1 million shares of common stock in registered direct offering

BioSante Pharmaceuticals, Inc. (NASDAQ: BPAX) today announced that it has received commitments from several institutional investors to purchase $25.1 million of securities in a registered direct offering. BioSante expects to receive net proceeds of approximately $23.8 million after deducting placement agent fees and other offering expenses. BioSante has entered into securities purchase agreements with these investors pursuant to which BioSante has agreed to sell an aggregate of approximately 12.2 million shares of its common stock and warrants to purchase up to approximately 4.0 million additional shares of its common stock. Each unit, consisting of one share of common stock and a warrant to purchase 0.33 of a share of common stock, will be sold for a purchase price of $2.0613, a premium to the closing price on the day before pricing.

"We are pleased to have this commitment from these new and existing institutional investors," said Stephen M. Simes, BioSante's president and chief executive officer. "This additional funding provides us with added financial power to continue to fund our ongoing LibiGel^® Phase III clinical study program. We recently announced completion of enrollment in the first of the two LibiGel Phase III efficacy trials and expect to announce completion of enrollment in the second in the near future. LibiGel remains the lead pharmaceutical product in the U.S. in active development for the treatment of hypoactive sexual desire disorder (HSDD) in menopausal women, and we continue to believe that LibiGel has the potential to be the first product approved by the FDA for this common and unmet medical need."

The warrants to purchase additional shares will be exercisable at an exercise price of $2.25 per share beginning immediately and will expire three years from their date of issuance. All of the securities were offered pursuant to an effective shelf registration statement. Proceeds from the transaction will be used for general corporate purposes, including continuing to fund BioSante's LibiGel Phase III clinical study program. The offering is expected to be consummated by March 8, 2011, subject to customary closing conditions.

Rodman & Renshaw, LLC, a subsidiary of Rodman & Renshaw Capital Group, Inc., (NASDAQ: RODM), acted as the exclusive placement agent for the transaction. Oppenheimer & Co. Inc., Roth Capital Partners, LLC, JMP Securities LLC and Trout Capital, LLC acted as financial advisors.

Shelf registration statements relating to the shares of common stock and warrants issued in the offering (and the shares of common stock issuable upon exercise of the warrants) have been filed with the Securities and Exchange Commission (the "SEC") and declared effective. A prospectus supplement relating to the offering will be filed by BioSante with the SEC. Copies of the prospectus supplement and accompanying prospectuses may be obtained directly from BioSante by contacting BioSante Pharmaceuticals, Inc., 111 Barclay Boulevard, Lincolnshire, Illinois 60069. Copies of the final prospectus supplement and accompanying prospectuses relating to the offering also may be obtained from Rodman & Renshaw, LLC, 1251 Avenue of the Americas 20th Floor, New York, NY 10020 or by calling (212) 356-0549. This announcement is neither an offer to sell nor a solicitation of an offer to buy any shares of common stock or warrants of BioSante. No offer, solicitation or sale will be made in any jurisdiction in which such offer, solicitation or sale is unlawful.