| Record No. | Name | No. of Entries |
| 626 | Papaveroline | 2 |
| 627 | Papaveroline sulfonic acid | 1 |
| 628 | Papaveroline,6-O-methyl- | 1 |
| 629 | Papaveroline,hydrobromide | 1 |
| 630 | Papaveroline,N-acetyl-,tetraacetate | 1 |
| 631 | Parfumine | 1 |
| 632 | Pavezan | 1 |
| 633 | Pavinal | 1 |
| 634 | Pavinane,(.+-.)- | 1 |
| 635 | Pavinane,methiodide,(.+-.)- | 1 |
| 636 | Pellotine | 1 |
| 637 | Pencardin | 1 |
| 638 | Pentazocine | 4 |
| 639 | Perphyllon | 1 |
| 640 | Pessoine | 1 |
| 641 | Phaeanthrine | 1 |
| 642 | Phellodendrine | 1 |
| 643 | Phellodendrine chloride | 1 |
| 644 | Phenazocine | 1 |
| 645 | Pholcodine | 2 |
| 646 | Pilocercine | 2 |
| 647 | PM 1000 | 1 |
| 648 | PMSD | 1 |
| 649 | Polycarpine | 2 |
| 650 | Predicentrine | 2 |