BioSante Pharmaceuticals Reports 100% Protection From H1N1 Challenge When Using BioVant(TM) Adjuvanted Vaccine

The BioSante presentation, "BioVant Calcium Phosphate (CaP) Nanoparticles: An Effective & Safe Adjuvant for Influenza Vaccines including H1N1 and H5N1," showed that BioVant-adjuvant effectively enhanced the natural immune response to the swine flu, using a BioVant-adjuvanted matrix protein M1 vaccine, and to H5N1 (bird flu), using a BioVant-adjuvanted H5N1 vaccine delivered via intranasal administration.

The studies concluded that swine and bird flu vaccines using BioSante's BioVant may allow for availability of a greater number of lower-dose vaccines, due to its dose sparing characteristics, and intranasal administration could provide more convenient and wider distribution during a flu pandemic.

"The results of the BioVant-influenza studies suggest that BioVant can increase the efficacy of a potential adjuvant-enhanced H1N1 vaccine," said Michael Snabes, BioSante's vice president of clinical development. "The exciting prospect is that BioVant also may allow use of lower doses of H1N1 swine flu vaccines in order to stretch potentially limited vaccine supplies."

An adjuvant is a substance that, when added to a vaccine, increases the vaccine's effectiveness by enhancing the body's immune response. In multiple studies, BioVant has been shown to be safe and cause minimal dose-dependent inflammation at the injection site, and has been shown both to prevent the manifestation of allergic response, and, to effectively 'switch off' established Th2-T-cell-associated allergic reactions and potentially to be delivered via alternative routes of administration, e.g. intranasally.

About BioSante Pharmaceuticals, Inc.

BioSante is a specialty pharmaceutical company focused on developing products for female sexual health, menopause, contraception and male hypogonadism. BioSante's lead products include LibiGel(R) (transdermal testosterone gel) in Phase III clinical development by BioSante under a U.S. Food and Drug Administration (FDA) SPA (Special Protocol Assessment) for the treatment of female sexual dysfunction (FSD), and Elestrin(TM) (estradiol gel) developed through FDA approval by BioSante, indicated for the treatment of moderate-to-severe vasomotor symptoms associated with menopause, currently marketed in the U.S. Also in development are Bio-T-Gel(TM), a testosterone gel for male hypogonadism, and an oral contraceptive in Phase II clinical development using BioSante patented technology. The current market in the U.S. for estrogen and testosterone products is approximately $2.5 billion and for oral contraceptives approximately $3 billion. The company also is developing its calcium phosphate technology (CaP) for aesthetic medicine (BioLook(TM)), as a vaccine adjuvant, including for an H1N1 (swine flu) vaccine, and drug delivery. Additional information is available online at: www.biosantepharma.com.

This news release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. The statements regarding BioSante contained in this news release that are not historical in nature, particularly those that utilize terminology such as "will," "potential", "may," "could," "can," "believe," "intends," "continue," "plans," "expects," "estimates" or comparable terminology, are forward-looking statements. Forward-looking statements are based on current expectations and assumptions, and entail various risks and uncertainties that could cause actual results to differ materially from those expressed in such forward-looking statements. Important factors known to BioSante that could cause actual results to differ materially from those expressed in such forward-looking statements include BioSante's need for and ability to obtain additional financing, the difficulty of developing pharmaceutical products, obtaining regulatory and other approvals and achieving market acceptance; the marketing success of BioSante's licensees or sublicensees; the success of clinical testing, and other factors identified and discussed from time to time in BioSante's filings with the Securities and Exchange Commission, including those factors discussed in BioSante's most recent annual report on Form 10-K and subsequent quarterly reports on Form 10-Q, which discussions are incorporated herein by reference. All forward-looking statements speak only as of the date of this news release. BioSante undertakes no obligation to update or revise any forward-looking statement, whether as a result of new information, future events or otherwise.

SOURCE: BioSante Pharmaceuticals, Inc.

McKinney/Chicago 
Alan Zachary 
(312) 944-6784 ext. 316 
azachary@mckinneychicago.com