| Record No. | Name | No. of Entries |
| 376 | Gindarine hydrochloride | 1 |
| 377 | Glaucine | 60 |
| 378 | Glaziovine | 14 |
| 379 | Govadine | 1 |
| 380 | Gyrocarpine | 1 |
| 381 | Hasubanonine | 1 |
| 382 | Heliamine | 4 |
| 383 | Heptafluorobutyryl-codeine | 1 |
| 384 | Hernandalinol | 1 |
| 385 | Hernandezine | 3 |
| 386 | Heroin | 1 |
| 387 | Heterocodeine | 1 |
| 388 | Higenamine | 2 |
| 389 | Higenamine hydrochloride | 1 |
| 390 | Higenamine-1-carboxylic acid | 1 |
| 391 | Homochelidonine | 1 |
| 392 | Homocoralyne sulfopropionate | 1 |
| 393 | Homotrilobin | 2 |
| 394 | Hydrastine | 6 |
| 395 | Hydrastine hydrochloride | 1 |
| 396 | Hydrastine sulfate | 1 |
| 397 | Hydrocodone | 5 |
| 398 | Hydrocotarnine | 1 |
| 399 | HYDROMORPHINOL | 1 |
| 400 | Hydromorphone | 3 |