| Fentanyl |
| Fentanyl (JAN/USP/INN) <JP/US> |
| Fentanyl citrate (JP18/USP) <JP/US> |
| Fentanyl hydrochloride (JAN) |
| Alfentanil |
| Alfentanil (INN) |
| Alfentanil hydrochloride (USP) <US> |
| Sufentanil |
| Sufentanil (USAN/INN) |
| Sufentanil citrate (USP) <US> |
| Remifentanil |
| Remifentanil (INN) |
| Remifentanil hydrochloride (JAN/USAN) <JP/US> |
| Morphine |
| Morphine (BAN) |
| Morphine sulfate (USP); Morphine sulfate hydrate (JP18) <JP/US> |
| Morphine hydrochloride hydrate (JP18) <JP> |
| Morphine tartrate |
| Hydromorphone |
| Hydromorphone (INN) |
| Hydromorphone hydrochloride (JAN/USP) <JP/US> |
| Dihydrocodeine |
| Dihydrocodeine (INN) |
| Dihydrocodeine phosphate (JP18) <JP> |
| Dihydrocodeine bitartrate (USP) |
| Dihydrocodeine thiocyanate |
| Oxymorphone |
| Oxymorphone (INN) |
| Oxymorphone hydrochloride (USP) <US> |
| Pethidine |
| Pethidine (INN) |
| Meperidine hydrochloride (USP); Pethidine hydrochloride (JP18) <JP/US> |
| Dextropropoxyphene |
| Dextropropoxyphene (INN) |
| Propoxyphene hydrochloride (USAN) <US> |
| Propoxyphene napsylate (USAN) |
| Tilidine |
| Tilidine (INN) |
| Tilidine hydrochloride (USAN) |
| Tramadol |
| Tramadol (INN) |
| Tramadol hydrochloride (JP18/USP) <JP/US> |
| Tapentadol |
| Tapentadol (USAN/INN) |
| Tapentadol hydrochloride (JAN) <JP/US> |
| Methadone |
| Methadone (BAN) |
| Methadone hydrochloride (JAN/USP) <JP/US> |
| Levacetylmethadol |
| Levomethadyl acetate (USAN); Levacetylmethadol (INN) |
| Levomethadyl acetate hydrochloride (USAN) |
| Levomethadone |
| Levomethadone (INN) |
| Levomethadone hydrochloride |
| Diamorphine |
| Diamorphine (BAN) |
| Diacetylmorphine hydrochloride |
| Diphenoxylate |
| Diphenoxylate (INN) |
| Diphenoxylate hydrochloride (USP) |
| Difenoxin |
| Difenoxin (USAN/INN) |
| Difenoxin hydrochloride |
| Ethylmorphine |
| Ethylmorphine (BAN) |
| Ethylmorphine hydrochloride hydrate (JP18) |
| Hydrocodone |
| Hydrocodone (INN) |
| Hydrocodone bitartrate (USP) <US> |
| Hydrocodone polistirex (USAN) |
| Hydrocodone hydrochloride |
| Codeine |
| Codeine |
| Codeine (USP) |
| Codeine phosphate (USP); Codeine phosphate hydrate (JP18) <JP> |
| Codeine polistirex (USAN) |
| Codeine sulfate (USP) <US> |
| Codeine hydrochloride |
| O-Acetyldihydrocodeine hydrochloride |
| Levorphanol |
| Levorphanol (INN) |
| Levorphanol tartrate (USP) <US> |
| Carfentanil |
| Carfentanil (INN) |
| Carfentanil citrate (USAN) |
| Brifentanil hydrochloride (USAN) |
| Lofentanil oxalate (USAN) |
| Methadyl acetate (USAN); Acetylmethadol (INN) |
| Mirfentanil hydrochloride (USAN) |
| Ocfentanil hydrochloride (USAN) |
| Trimeperidine (INN) |
| Alphacetylmethadol (INN) |
| Betacetylmethadol (INN) |
| Alphameprodine (INN) |
| Betameprodine (INN) |
| Clonitazene (INN) |
| Etonitazene (INN) |
| Alphamethadol (INN) |
| Betamethadol (INN) |
| Alphaprodine (INN) |
| Betaprodine (INN) |
| Etoxeridine (INN) |
| Hydroxypethidine (INN) |
| Furethidine (INN) |
| Piminodine (INN) |
| Benzethidine (INN) |
| Hydromorphinol (INN) |
| Levophenacylmorphan (INN) |
| Phenomorphan (INN) |
| Methyldihydromorphine (INN) |
| Metopon (BAN) |
| Methyldesorphine (INN) |
| Norlevorphanol (INN) |
| Phenampromide (INN) |
| Diampromide (INN) |
| Levomethorphan (INN) |
| Morpheridin (INN) |
