| Name | Aliases |
|---|---|
| Simeticone / Calcium Carbonate / Magnesium Carbonate (Rennie Deflatine) | |
| Simparica (Sarolaner) | |
| Simparica Trio (Pyrantel Pamoate / Sarolaner / Moxidectin) | |
| Simplicef (Cefpodoxime Proxetil) | |
| Simponi (Golimumab) | |
| Simvastatin (Zocor) | |
| Sinemet (Levodopa / Carbidopa) | Carbidopa / Levodopa |
| Sinemet CR (Levodopa / Carbidopa) | Half Sinemet CR, Carbidopa / Levodopa |
| Sinequan (Doxepin Hydrochloride) | |
| Singulair (Montelukast Sodium) | |
| Singulair Chewable (Montelukast Sodium) | |
| Singulair Granules (Montelukast Sodium) | |
| Sintrom (nicoumalone) | |
| Sinutab (Pseudoephedrine Sulfate / Acetaminophen) | |
| Siponimod (Mayzent) | |
| Sirolimus (Rapamune) | |
| Sirolimus (Rapamune Solution) | |
| Sitagliptin Phosphate (Januvia) | |
| Sitagliptin Phosphate / Metformin Hydrochloride (Janumet) | |
| SK-Lygen (Chlordiazepoxide Hydrochloride) | Libritabs, Limbitrol |