BioSante Pharmaceuticals Completes Phase II Clinical Trial for Female Sexual Dysfunction.

LINCOLNSHIRE, Ill. -- BioSante Pharmaceuticals, Inc. (Amex:BPA) announced today that it has completed its Phase II clinical trial of LibiGel(TM) (transdermal testosterone gel) for the treatment of female sexual dysfunction (FSD).

The trial was a double-blind, placebo-controlled study, conducted in the United States, that included 46 patients to determine the effect of LibiGel on women's sexual desire and activity. The primary data (frequency of satisfying sexual events) from the Phase II trial currently are being analyzed. The safety profile for subjects receiving LibiGel was similar to that observed for subjects in the placebo group. There were no serious adverse events and no discontinuations due to adverse events in any subject receiving LibiGel, indicating the safety and acceptability of LibiGel.

"We concluded the LibiGel Phase II trial earlier than anticipated based on a previous interim analysis, and on data recently announced by Procter & Gamble on a Phase III clinical trial of their testosterone patch for FSD," said Dr. Leah M. Lehman, vice president of clinical and regulatory affairs for BioSante. "The P&G study data indicate that the testosterone patch resulted in a statistically significant increase in sexual activity in women. Based on the interim analysis we are confident that LibiGel will have similar effects and expect the final data from our Phase II clinical trial will allow us to move into Phase III."

BioSante announced late last year that a blinded interim analysis of the then ongoing Phase II trial of LibiGel showed statistically significant results for the primary endpoint of the study. The interim study data, presented at a meeting of the International Society for the Study of Women's Sexual Health (ISSWSH) in Amsterdam, showed that after three months of treatment there was a 130 percent increase in the frequency of satisfying sexual events as measured by individual patient diaries.

The interim analysis reported on the first 28 patients who had completed the study without breaking the blind as to dose of LibiGel or placebo. The data indicated an effective LibiGel dose for the treatment of hypoactive sexual desire disorder (HSDD) in women, and that LibiGel was well tolerated during the course of the trial. BioSante had previously completed three Phase I/II LibiGel clinical trials to determine blood levels of testosterone delivered by six different doses of LibiGel.

"Clinical data indicate that LibiGel improves sexual activity and desire in women suffering from HSDD and we believe that LibiGel can make an important contribution to the well-being of women," said Stephen M. Simes, president and chief executive officer of BioSante. "Female sexual dysfunction is underserved by the pharmaceutical industry today; in fact, there is no pharmaceutical product on the market for the treatment of FSD. We are very pleased LibiGel, which offers important advantages in patient acceptance, may help successfully address this unmet medical need."

LibiGel is a gel formulation of bioidentical testosterone designed to be quickly absorbed through the skin after application on the arms, shoulders or abdomen, delivering testosterone to the bloodstream evenly over time and in a non-invasive and painless manner. Though generally characterized as a male hormone, testosterone also is present in women and its deficiency has been found to decrease libido or sex drive. Studies have further shown that testosterone therapy can increase bone density, raise energy levels and improve mood, in addition to boosting sexual desire and pleasure.

According to a study published in the Journal of the American Medical Association, 43 percent of American women (about 40 million) experience some degree of impaired sexual function. Among the more than 1,400 women surveyed, 32 percent lacked interest in sex and 26 percent could not experience orgasm. The majority of women with FSD are postmenopausal, experiencing FSD due to hormonal changes following menopause, whether natural or surgical.

BioSante's hormone product portfolio

In addition to LibiGel, BioSante is developing Bio-T-Gel(TM) for treatment of men with testosterone deficiency and Bio-E-Gel(TM) for treatment of women with estrogen deficiency. Symptoms of these hormone deficiencies in men include impotence, diminished sex drive, muscle weakness and osteoporosis. Symptoms in menopausal women include hot flashes, vaginal atrophy, decreased libido and osteoporosis. The estrogen and testosterone markets in the United States alone account for approximately $2.5 billion in annual sales.

About BioSante Pharmaceuticals, Inc.

BioSante is developing a pipeline of hormone therapy products to treat both men and women. BioSante's hormone therapy products are gel formulations for transdermal administration that deliver bioidentical estradiol and testosterone. The company also is developing its calcium phosphate nanotechnology (CAP) for novel vaccines, including biodefense vaccines for toxins such as anthrax and ricin, and drug delivery systems. 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 press release that are not historical in nature, particularly those that utilize terminology such as "may," "will," "should," "likely," "expects," "anticipates," "estimates," "believes" or "plans," 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 cause actual results to differ materially from those expressed in such forward-looking statements are the difficulty of developing pharmaceutical products and especially of new vaccines, obtaining regulatory and other approvals and achieving market acceptance, and other factors identified and discussed from time to time in BioSante's filings with the Securities and Exchange Commission, including those factors discussed on pages 18 to 25 of BioSante's Form 10-KSB, which discussion also is incorporated herein by reference.