BioDelivery Sciences (BDSI) Awarded Patent Resulting in $15 Million Milestone Payment

RALEIGH, N.C., April 17, 2012 /PRNewswire/ — BioDelivery Sciences International, Inc. (Nasdaq: BDSI) announced that the U.S. Patent and Trademark Office (USPTO) has formally awarded BDSI’s patent No. 13/184306, “Transmucosal Delivery Devices with Enhanced Uptake,” which extends the patent protection for BDSI’s BioErodible MucoAdhesive (BEMA) products, BEMA Buprenorphine and BEMA Buprenorphine/Naloxone, by seven years to 2027. The USPTO had issued a Notice of Allowance to BDSI for this patent as previously disclosed in February of this year.

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BDSI now confirms that the $15 million milestone associated with its licensing and development agreement with Endo Pharmaceuticals for BEMA Buprenorphine is payable, bringing the total milestone payments received thus far to $45 million.

About BioDelivery Sciences International

BioDelivery Sciences International (NASDAQ: BDSI) is a specialty pharmaceutical company that is leveraging its novel and proprietary patented drug delivery technologies to develop and commercialize, either on its own or in partnerships with third parties, new applications of proven therapeutics. BDSI is focusing on developing products to meet unmet patient needs in the areas of pain management and oncology supportive care. BDSI’s pain franchise currently consists of two products utilizing the patented BEMA technology. ONSOLIS (fentanyl buccal soluble film) is approved in the U.S., Canada, and the E.U. (where it will be marketed as BREAKYL), for the management of breakthrough pain in opioid tolerant, adult patients with cancer. The commercial rights are licensed to Meda for all territories worldwide except for Taiwan (licensed to TTY Biopharm) and South Korea (licensed to Kunwha Pharmaceutical Co.). BDSI’s second pain product, BEMA Buprenorphine, is being developed for the treatment of moderate to severe chronic pain and is in development in a high dose formulation with naloxone for the treatment of opioid dependence. BEMA Buprenorphine for chronic pain is licensed on a worldwide basis to Endo Pharmaceuticals. Additional product candidates are being developed utilizing the BEMA technology for conditions such as nausea/vomiting (BEMA Granisetron). BDSI’s headquarters is located in Raleigh, North Carolina. For more information, visit www.bdsi.com.

BDSI® and BEMA® are registered trademarks of BioDelivery Sciences International, Inc. ONSOLIS® is a registered trademark of Meda Pharmaceuticals, Inc. BREAKYL is registered trademark of Meda Pharma GmbH & Co. KG.

Cautionary Note on Forward-Looking Statements

This press release and any statements of representatives and partners of BioDelivery Sciences International, Inc. (the “Company”) related thereto contain, or may contain, among other things, certain “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. Such forward-looking statements involve significant risks and uncertainties. Such statements may include, without limitation, statements with respect to the Company’s plans, objectives, projections, expectations and intentions and other statements identified by words such as “projects,” “may,” “will,” “could,” “would,” “should,” “believes,” “expects,” “anticipates,” “estimates,” “intends,” “plans,” “potential” or similar expressions. These statements are based upon the current beliefs and expectations of the Company’s management and are subject to significant risks and uncertainties, including those detailed in the Company’s filings with the Securities and Exchange Commission. Actual results (including, without limitation, the results of the Company’s development initiatives with, and potential future royalties from, BEMA Buprenorphine and BEMA Buprenorphine/Naloxone) may differ significantly from those set forth in the forward-looking statements. These forward-looking statements involve certain risks and uncertainties that are subject to change based on various factors (many of which are beyond the Company’s control). The Company undertakes no obligation to publicly update any forward-looking statements, whether as a result of new information, future events or otherwise, except as required by applicable law.

Readers are cautioned that peak sales and market size estimates have been determined on the basis of market research and comparable product analysis, but no assurances can be given that such estimates are accurate or that such sales levels will be achieved, if at all.

SOURCE BioDelivery Sciences International, Inc.