BioSante Pharmaceuticals Closes $3,475,000 Registered Direct Offering

BioSante Pharmaceuticals Closes $3,475,000 Registered Direct Offering

<0> For Investors:The Trout Group LLCTricia Swanson, 646-378-2953orFor Media:McKinney/ChicagoAlan Zachary, 312-506-5220 </0>

BioSante Pharmaceuticals, Inc. (NASDAQ: BPAX) today announced the closing of the sale of 2,359,932 shares of its common stock and warrants to purchase up to 1,179,966 additional shares of its common stock in a registered direct offering, resulting in gross cash proceeds to BioSante of $3,475,000. BioSante received net proceeds of approximately $3.3 million after deducting placement agent fees and other offering expenses. Each unit, consisting of one share of common stock and a warrant to purchase 0.5 of a share of common stock, was sold to one institutional investor for a purchase price of $1.4725, which was a premium to the closing price on the day before pricing. The warrants are exercisable immediately at an exercise price of $1.50 per share and will expire on August 17, 2017.

Proceeds from the transaction will be used for general corporate purposes, including increasing the Company’s cash reserve for payment of its 3.125% convertible senior notes due May 1, 2013 and to fund its LibiGel clinical activities.

Rodman & Renshaw, LLC acted as the exclusive placement agent for the transaction. From time to time, Roth Capital has served as a financial advisor to BioSante.

All of the securities were offered and sold pursuant to an effective shelf registration statement filed by BioSante with the Securities and Exchange Commission. 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.

BioSante’s corporate strategy is to develop high value medically-needed pharmaceutical products and to implement strategic alternatives with respect to its products and its company, including licenses, business collaborations and other business combinations or transactions with other pharmaceutical and biotechnology companies. BioSante´s products include LibiGel (transdermal testosterone gel) for the treatment of female sexual dysfunction (FSD), specifically hypoactive sexual desire disorder (HSDD), which is in Phase III clinical development. BioSante also is developing a portfolio of cancer vaccines, with 17 Phase I and Phase II clinical trials currently on-going. Four of these vaccines have been granted Orphan Drug designation by the U.S. Food and Drug Administration (FDA). BioSante´s other products include an FDA-approved testosterone gel for male hypogonadism, which is licensed to Teva Pharmaceuticals USA, Inc., and the Pill-Plus™, an oral contraceptive in Phase II clinical development by Pantarhei Bioscience B.V. BioSante´s first FDA-approved product, Elestrin™ (estradiol gel) indicated for the treatment of hot flashes associated with menopause, is marketed in the U.S. by Jazz Pharmaceuticals, BioSante´s licensee. Additional information is available online at: .

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