By API Standards
- S-Adenosylmethionine
- Sacubitril
- Safinamide
- Salbutamol
- Salmeterol
- Saroglitazar
- Scopolamine
- Selexipag
- Sertraline
- Sildenafil
- Silibinin
- Silodosin
- Simvastatin
- Sirolimus
- Sitagliptin
- Sn-Glycero
- Sofosbuvir
- Sonidegib
- Sorafenib
- Sotagliflozin
- Sotalol
- Spironolactone
- Stiripentol
- sulfachloropyrazine
- Sulfachloropyridazine
- Sulfadiazine
- Sulfadimethoxine
- Sulfadimethoxypyrimidine
- Sulfamerazine
- Sulfamethazine
- Sulfamethizole
- Sulfamethoxazole
- Sulfamonomethoxine
- Sulfapyridine
- Sulfaquinoxaline
- Sulfathiazole
- Sulfonamides
- Sumatriptan
- Sunitinib
- Suvorexant