Study Status: Completed
Recruit Status: Completed
Study Type: Interventional
Official Title: Reinforcing Effects of Intranasal Buprenorphine Versus Buprenorphine/Naloxone in Buprenorphine-maintained Intranasal Drug Users
Brief Summary: The study is designed to compare the abuse liabilities of intranasal buprenorphine and buprenorphine/naloxone in individuals who are physically dependent on sublingual buprenorphine. The investigators hypothesize that the abuse liability of buprenorphine/naloxone is lower than that of buprenorphine alone.