This document summarizes the history and background of various medications used to treat opioid addiction, including methadone, buprenorphine, and the experimental medication ibogaine. It discusses how methadone maintenance therapy was established in the 1960s, while buprenorphine was developed in the 1970s-2000s and approved for opioid addiction treatment. Ibogaine's anti-addictive effects were discovered in 1962, but it remains experimental. The document compares early generations of patients using these medications to later generations, and discusses issues of stigma, discrimination, and profitability regarding their development and availability.