Primary Hypothesis: The purpose of this study is to determine the safety of a sublingual tablet formulation of buprenorphine and naloxone by extending the combination tablet availability to physicians in office-based practice. The general consensus is that the initial effort should involve physicians experienced in the treatment of opiate dependence. The fact that buprenorphine is already in a formulation available as a schedule V analgesic should allow for its administration in and dispensing from a physician's office. The research data showing its high level of safety, patient acceptance and clinical efficacy, and its availability as a formulation that can be given for take-home dosing with low intravenous abuse liability, argue compellingly for exploring alternative implementation strategies in settings other than traditional narcotic treatment programs.