RALEIGH, N.C., Oct. 9, 2013 /PRNewswire/ -- BioDelivery Sciences International, Inc. (Nasdaq: BDSI) announced today that its New Drug Application (NDA) for BUNAVAIL (buprenorphine naloxone buccal film) for the maintenance treatment of opioid dependence has been accepted for filing by the U.S. Food and Drug Administration (FDA), indicating that the application is sufficiently complete to permit a substantive review. Based on timelines established by the Prescription Drug User Fee Act (PDUFA), the review of the BUNAVAIL NDA is expected to be completed by early June 2014. (Logo: http://photos.prnewswire.com/prnh/20110217/CL49801LOGO ) BUNAVAIL utilizes BDSI's proprietary BioErodible MucoAdhesive (BEMA) technology to deliver buprenorphine for the maintenance treatment of opioid dependence, along with the opioid antagonist naloxone, which is intended to serve as an abuse deterrent. BUNAVAIL was designed to efficiently and conveniently deliver buprenorphine while potentially overcoming some of the challenges with other dosage forms. BDSI believes BUNAVAIL may offer meaningful advantages over existing treatments and could provide an alternative to the over 2 million people estimated in the U.S. to be opioid dependent. Currently, Suboxone sublingual film is the only available film formulation of buprenorphine and naloxone and is estimated to have generated sales in excess of $1 billion dollars over the last 12 months. BUNAVAIL, if approved by the FDA, would be the first buccal film formulation of buprenorphine/naloxone to enter the market. BDSI believes that BUNAVAIL has the potential to generate annual peak U.S. sales up to $250 million. About BUNAVAIL and Opioid Dependence BUNAVAIL is the first and only buccal (adhering to the inside of the cheek) formulation of buprenorphine and naloxone and has been developed for the maintenance treatment of opioid dependence. BUNAVAIL utilizes BDSI's proven and patent-protected BioErodible MucoAdhesive (BEMA) drug delivery technology.