| Buprenorphine |
| Buprenorphine (JAN/INN) <JP/US> |
| Buprenorphine hydrochloride (JP18/USP) <JP/US> |
| Naltrexone |
| Naltrexone (USAN/INN) <US> |
| Naltrexone hydrochloride (USP) <US> |
| Nalmefene |
| Nalmefene (USAN/INN) |
| Nalmefene hydrochloride <US> |
| Nalmefene hydrochloride hydrate (JAN) <JP> |
| Methylnaltrexone bromide (JAN/USAN) <US> |
| Alvimopan (USAN) <US> |
| Naloxegol |
| Naloxegol (USAN/INN) |
| Naloxegol oxalate (USAN) <US> |
| Naloxone |
| Naloxone (INN) |
| Naloxone hydrochloride (JP18/USP) <JP/US> |
| Naloxone hydrochloride dihydrate <US> |
| Naldemedine |
| Naldemedine (USAN/INN) |
| Naldemedine tosylate (JAN/USAN) <JP/US> |
| Eluxadoline (USAN/INN) <US> |
| Nalorphine |
| Nalorphine (INN) |
| Nalorphine hydrochloride (USP) |
| Eptazocine |
| Eptazocine (INN) |
| Eptazocine hydrobromide (JAN) |
| Samidorphan |
| Samidorphan (USAN) |
| Samidorphan l-malate (USAN) |
| Methylsamidorphan |
| Methylsamidorphan (USAN) |
| Methylsamidorphan chloride (USAN/INN) |
| Navacaprant |
| Navacaprant (USAN/INN) |
| Navacaprant hydrochloride (USAN) |
| Cyclazocine (USAN/INN) |
| Quadazocine mesylate (USAN) |
| Bevenopran (USAN/INN) |
| Aticaprant (USAN/INN) |
