| Pyrroloquinoline Quinone | 122628-50-6 | Herbal remedies | 3 |
| Quinidine | 56-54-2 | Anti-arrhythmics | 3 |
| R-(-)-3-Quinuclidinol | 25333-42-0 | Neurokinin antagonists | 3 |
| Raltitrexed | 112887-68-0 | Antimetabolites | 3 |
| Ramelteon | 196597-26-9 | Hypnotics | 3 |
| Ramosetron | 132036-88-5 | 5HT3 antagonists | 3 |
| Recuronium Br | 119302-91-9 | Neuromuscular blocking agents | 3 |
| Relugolix | 737789-87-6 | Gonadotrophic | 3 |
| Remdesivir | 1809249-37-3 | Antivirals | 3 |
| Resmetirom | 1432368-62-9 | Thyreomimetics | 3 |
| S-Acetyl-L-glutathione | 3054-47-5 | Antioxidants | 3 |
| SN-38 | 86639-52-3 | Cytostatic antibiotics | 3 |
| Safinamide Mesylate | 202825-46-5 | | 3 |
| Secukinumab | 1229022-83-6 | Interleukin inhibitors | 3 |
| Semaglutide Main Chain P29 Arg34-GLP(9-37) | 1169630-82-3 | | 3 |
| Silver Nitrate | 7761-88-8 | Disinfectants | 3 |
| Sodium dihydrogenphosphate dihydrate | 13472-35-0 | Calcium regulators | 3 |
| Sodium fusidate Micronised | | Antibacterials | 3 |
| Sodium gluconate | | Calcium regulators | 3 |
| Sodium lauryl sulfate | 151-21-3 | Oral care products | 3 |
| Sodium thiosulfate | | Antidotes | 3 |
| Somatropin recombinant | 12629-01-5 | Somatropin Agonists | 3 |
| Sonidegib | 956697-53-3 | Protein kinase inhibitors | 3 |
| Sotorasib | 1610526-40-8 | Protein kinase inhibitors | 3 |
| Soya-bean oil | | Other lipid-lowering agents | 3 |
| Spermidine | 124-20-9 | Immunostimulants | 3 |
| Spinosad | 168316-95-8 | Scabicides | 3 |
| Streptozocin | 18883-66-4 | Cytostatic antibiotics | 3 |
| Strontium | | Calcium regulators | 3 |
| Sulconazole | 61318-90-9 | Antimycotics | 3 |
| Sulfadiazine Sodium | 547-32-0 | Sulfonamides and trimethoprim | 3 |
| Sulfapyridine | 144-83-2 | Sulfonamides and trimethoprim | 3 |
| Sulfinpyrazone | 57-96-5 | Anti-Gout | 3 |
| Sulfur | | Sulfur derivatives | 3 |
| Talniflumate | 66898-62-2 | Anti-inflammatory Agents | 3 |
| Tapentadol Hydrochloride | | Opioid analgesics | 3 |
| Tegafur | 17902-23-7 | Antineoplastics | 3 |
| Telaprevir | 402957-28-2 | Anti-HCV agents | 3 |
| Terpin Hydrate | 2451-01-6 | Cough suppressants | 3 |
| tenofovir alafenamide fumarate | 1392275-56-7 | | 3 |