Active ingredient (Brand name) | Available as injection? | Addictive potential | Dosing scheme | Reversible? | Available in the USA / EU? |
---|---|---|---|---|---|
Methadone | No | Yes (agonista) | Once daily | Yes, subject to 5–10 days of withdrawal | Yes / Yes |
Buprenorphine (Subutex, Suboxone, Buvidal) | Yes | Yes (partial agonist / antagonista) | Daily or thrice weeklyb | Yes, subject to 3–8 days of withdrawal | Yes / Yes |
Naltrexone (Vivitrol) | Yesc | No (antagonista) | Every 4 weeks | No | Yes / No, but ongoing studies |