BioSante Pharmaceuticals Completes Enrollment

in Both Pivotal LibiGel® Phase III Efficacy Trials

LINCOLNSHIRE, Illinois (March 30, 2011) - BioSante Pharmaceuticals, Inc. (NASDAQ: BPAX) today announced that enrollment of subjects in the second of two pivotal Phase III LibiGel (testosterone gel) safety and efficacy trials has been completed. Enrollment in the first LibiGel efficacy trial was completed in February. The efficacy trials are being conducted under an FDA-approved special protocol assessment (SPA) agreement. LibiGel is in development for the treatment of female sexual dysfunction (FSD), specifically, hypoactive sexual desire disorder (HSDD) in menopausal women, for which there is no FDA-approved product.

"This is an important achievement for BioSante and a key step toward completing the LibiGel Phase III clinical development program," said Joanne Zborowski, BioSante's vice president of clinical development. "There are more than 1,000 subjects in the efficacy trials and we anticipate announcing top-line efficacy data this fall. In addition, we have over 3,000 subjects enrolled in our LibiGel Phase III safety study," she added.

Phillip B. Donenberg, BioSante's senior vice president of finance & CFO commented, "This key LibiGel achievement, coupled with our successful financing strategy, guarantees a solid timeline for Phase III efficacy data, with sufficient funds to finance our operations and LibiGel clinical development through that data and well into 2012. As a result, we have removed near-term financial risk from BioSante without the need for additional funds."

About LibiGel®

LibiGel is a testosterone gel in Phase III clinical development for the treatment of women who suffer from female sexual dysfunction (FSD). Enrollment has been completed in the two on-going Phase III efficacy trials which are double-blind, placebo-controlled trials of approximately 500 surgically menopausal women each. The efficacy trials are being conducted under an FDA-approved special protocol assessment (SPA) agreement. LibiGel is absorbed quickly through the skin after applying a once-daily pea-sized topical application on the upper arm that delivers testosterone to the bloodstream evenly over time.

In a Phase II trial, LibiGel significantly increased the number of satisfying sexual events in surgically menopausal women suffering from FSD by 238 percent versus baseline (p

BioSante also is conducting a Phase III LibiGel safety study, a randomized, double-blind, placebo-controlled, multi-center, cardiovascular (CV) events and breast cancer study that has enrolled over 3,000 women. The study will continue for a total of five years, however, BioSante can use the safety study data as part of an NDA submission after an average of 12 months of exposure to LibiGel or placebo.

The LibiGel safety study is tracking a predefined list of CV events, in agreement with the FDA, including CV death, myocardial infarction and stroke in women 50 years of age or older and suffering from at least two CV risk factors including hypertension and diabetes. The objective of the safety study is to show the relative safety of testosterone compared to placebo in the number of CV events. The incidence of breast cancer also is being tracked over the course of the study.

About BioSante Pharmaceuticals, Inc.

BioSante is a specialty pharmaceutical company focused on developing products for female sexual health and oncology. BioSante's lead products include LibiGel® (transdermal testosterone gel) for the treatment of female sexual dysfunction (FSD) which is in Phase III clinical development under a U.S. Food and Drug Administration (FDA) Special Protocol Assessment. BioSante's first FDA-approved product is Elestrin™ (estradiol gel) indicated for the treatment of hot flashes associated with menopause, marketed in the U.S. by Azur Pharma, BioSante's licensee. BioSante also is developing a portfolio of cancer vaccines, four of which have been granted Orphan Drug designation, and are currently in several Phase II clinical trials. Other products are Bio-T-Gel™, a testosterone gel for male hypogonadism licensed to Teva Pharmaceuticals and an oral contraceptive in Phase II clinical development using BioSante patented technology. Additional information is available online at:

http://www.biosantepharma.com

For more information, please contact:

For Media: McKinney Chicago Alan Zachary phone: (312) 506-5220

For Investors: The Trout Group LLC Tricia Swanson E-Mail: tswanson@troutgroup.com Phone: (646) 378-2953

Forward-Looking Statements To the extent any statements made in this news release deal with information that is not historical, these are forward-looking statements under the Private Securities Litigation Reform Act of 1995. Such statements include, but are not limited to, statements about BioSante's plans, objectives, expectations and intentions with respect to future operations and products, the timing of anticipated regulatory submissions and other statements identified by words such as "will," "potential," "could," "can," "believe," "intends," "continue," "plans," "expects," "anticipates," "estimates," "may," other words of similar meaning or the use of future dates. Forward-looking statements by their nature address matters that are, to different degrees, uncertain. Uncertainties and risks may cause BioSante's actual results to be materially different than those expressed in or implied by BioSante's forward-looking statements. For BioSante, particular uncertainties and risks include, among others, 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 BioSante's need for and ability to obtain additional financing. More detailed information on these and additional factors that could affect BioSante's actual results are described in BioSante's filings with the Securities and Exchange Commission, including its most recent annual report on Form 10-K and subsequent quarterly reports on Form 10-Q. All forward-looking statements in this news release 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.