| PRL-8-53 | 1432368-62-9 |
| Pitolisant | 63547-13-7 |
| Plecanatide | 467426-54-6 |
| Pneumocandin B0 | 135575-42-7 |
| Polyquaternium-1 | |
| Polysorbate 60 | |
| Ponatinib | 943319-70-8 |
| Potassium Guaiacolsulfonate | |
| Potassium acetate | 127-08-2 |
| Potato starch | 9005-25-8 |
| Povidone K-12 | |
| Pralatrexate | 146464-95-1 |
| Pralidoxime | 6735-59-7 |
| Pramiracetam | 68497-62-1 |
| Pramoxine Hydrochloride | 637-58-1 |
| Prednisolone Hemisuccinate | |
| Probucol | 23288-49-5 |
| Protirelin | 24305-27-9 |
| Pyrazine hydrochloride | 762240-92-6 |
| Pyridoxal | 66-72-8 |
| Pyridoxal Phosphate | 54-47-7 |
| Pyroglutamate | 149-87-1 |
| Pyrroloquinoline Quinone | 122628-50-6 |
| Quinacrine | 83-89-6 |
| Racemethionine | 59-51-8 |
| Recuronium Br | 119302-91-9 |
| Relugolix | 737789-87-6 |
| Retapamulin | 224452-66-8 |
| Ribociclib Succinate | |
| Riboflavin-5-phosphate Sodium | 2319-84-8 |
| Ribonuclease | |
| Ribose | 50-69-1 |
| Ropivacaine Hydrochloride | 132112-35-7 |
| Roxatidine acetate | 78628-28-1 |
| Ruxolitinib Phosphate | 941678-49-5 |
| Ruxolitinib Phosphate Intermediates | |
| S-Carboxymethyl-L-cysteine | 2387-59-9 |
| Safinamide Mesylate | 202825-46-5 |
| Sapropterin | 62989-33-7 |
| Saquinavir | 127779-20-8 |