| S | ||
| Salmeterol | Serevent | |
| Salsalate | Disalcid | |
| Sargramostim | Leukine | |
| Scopolamine HBr | Transderm-Scop | |
| Secobarbital Sodium | Seconal Sodium | |
| Selegiline HCI | Eldepryl | |
| Selenium Sulfide | Selsun Blue, Selsun | |
| Senna | Senokot, Senolax | |
| Setraline HCI | Zoloft | |
| Silver Sulfadiazine | Silvadene | |
| Simethicone | Gas-X, Mylicon, Phazyme | |
| Sirrivastatin | Zocor | |
| Sincalide | Kinevac | |
| Sodium Citrate & Citric Acid | Bicitra | |
| Sodium Fluoride | Karidium, Luride, Pediaflor | |
| Sodium Hyaluronate | Healon, Amvisc | |
| Sodium Phosphate Enema | Fleet Enema | |
| Sodium Polystyrene Sulfonate | Kayexalate | |
| Sotalol HCI | Betapace | |
| Spectinomycin HCI | Trobicin | |
| Spironolactone | Aldactone | |
| Spironolactone & Hydrochlorothiazide | Aldactazide | |
| Streptokinase | Streptase | |
| Streptozocin | Zanosar | |
| Succinylcholine Chloride | Quelicin, Anectine | |
| Sucralfate | Carafate | |
| Sufentanil Citrate | Sufenta | |
| Sulfacetamide Sodium | Bleph-10, Sulamyd Sodium | |
| Sulfadoxine & Pyrimethamine | Fansidar | |
| Sulfamethoxazole | Gantanol | |
| Sulfamethoxazole & Phenazopyridine HCI | Azo-Gantanol | |
| Sulfamethoxazole & Trimethoprim | Bactrim, Septra | |
| Sulfasalazine | Azulfidine | |
| Sulfinpyrazone | Anturane | |
| Sulfisoxazole | Gantrisin | |
| Sulfisoxazole & Phenazopyridine HCI | Azo-Gantrisin | |
| Sulindac | Clinoril | |
| Sumatriptan Succinate | Imitrex |