 Subjects will also receive psychosocial and behavioral counseling as specified by the PI. The End of Study visit will occur 1 week after Day 84 or 1 week after the monthly follow-up visits after Day 84, given a subjects buprenorphine plasma concentration has fallen below 100 pgmL. For subjects with plasma concentrations of buprenorphine above 100 pgmL at Day 140, Day 150 will be the End of Study visit. 