| Rolipram | 61413-54-5 | Phosphodiesterase-4 Inhibitors | 1 |
| Roman chamomile | | Herbal remedies | 1 |
| Romiplostim | 267639-76-9 | Other antithrombin | 1 |
| Ropivacaine Intermediates | | | 1 |
| Rosemary leaf | | Herbal remedies | 1 |
| Rotenone | 1228105-51-8 | | 1 |
| Rotigotine intermediates | 58349-17-0 | | 1 |
| Roxadustat intermediates | 808116-52-1 | | 1 |
| Rucaparib | 283173-50-2 | Enzyme Replacements/modifiers | 1 |
| S-(+)-4-Phenyl-2-Oxazolidinone (S-Poz) | 99395-88-7 | Intermediates | 1 |
| S-Adenosyl-L-Methionine Disulfate Tosylate | 97540-22-2 | | 1 |
| S-Carboxymethylcysteine-L-Lysinate | 49673-81-6 | Mucolytics | 1 |
| S-ethylisothiourea hydrobromide | 1071-37-0 | | 1 |
| SECNIDAZOLE | 3366-95-8 | | 1 |
| Saccharum | | Oral care products | 1 |
| Saffron Extract | 161715-24-8 | | 1 |
| Saffron thread cut | | Herbal remedies | 1 |
| Safinamide methanesulfonate | 946075-13-4 | Other central nervous system agents | 1 |
| Sage | | Herbal remedies | 1 |
| Salvia tincture | | Herbal remedies | 1 |
| Sarafloxacin | 98105-99-8 | Fluorides | 1 |
| Sarolaner | 1398609-39-6 | | 1 |
| Sarsaparilla root | | Herbal remedies | 1 |
| Savory herb | | Herbal remedies | 1 |
| Saw palmetto | | Herbal remedies | 1 |
| Saxagliptin intermediates | 361442-00-4 | | 1 |
| Seaweed liquid extract | | | 1 |
| Secalciferol | 55721-11-4 | | 1 |
| Secretin | | Hormones | 1 |
| Selamectin | 1092939-17-7 | | 1 |
| Selenious acid | 7783-00-8 | Electrolytes | 1 |
| Selinexor | 1393477-72-9 | | 1 |
| Semaglutide Primary Acylation Intermediate | | | 1 |
| Senega extracts and tinctures | | | 1 |
| Senna fruit alexandrie | | Laxatives | 1 |
| Senna fruit tinnevelly | | Laxatives | 1 |
| Senna leaf | | Laxatives | 1 |
| Senna leaves cut | | Laxatives | 1 |
| Sertindole | 106516-24-9 | Atypical antipsychotics | 1 |
| Sesame seed | | Other lipid-lowering agents | 1 |