- Saccharin
- Sacubitril
- Sacubitril
- Safinamide
- Safinamide
- Salacinol
- Salbutamol
- Salbutamol
- Salcaprozate
- Salmeterol
- Salmeterol
- Sapropterin
- Saquinavir
- Sarecycline
- Satranidazole
- Saviprazole
- Saxagliptin
- Scopolamine
- Sebacic acid
- Secnidazole
- Selamectin
- Selegiline
- Selexipag
- Selinexor
- Selpercatinib
- Selumetinib
- Semaglutide
- Semduramicin
- Senecionine
- Seneciphylline
- Senecivernine
- Senkirkine
- Sennoside
- Serotonin
- Sertraline
- Setmelanotide
- Sevoflurane
- Sibutramine
- Sildenafil
- Silibinin
- Silodosin
- Simethicone
- Simvastatin
- Sincalide
- Siponimod
- Sisomicin
- Sisomicin Sulfate
- Sitagliptin
- Sitravatinib
- Sodium Stearyl Maleate
- Solifenacin
- Solriamfetol
- Sonidegib
- Sorafenib
- Sorbic Acid
- Sorbitol
- Sotalol
- Sotorasib
- Sparfloxacin
- Spectinomycin
- Spilanthol
- Spiramycin
- Spironolactone
- Stanozolol
- Staurosporine
- Stevioside
- Stiripentol
- Strychnine
- Sucralfate
- Sucralose
- Sufentanil
- Sugammadex
- Sulbactam
- Sulfacetamide sodium
- Sulfadiazine
- Sulfadimethoxine
- Sulfadoxime
- Sulfadoxine
- Sulfamethoxazole
- Sulfasalazine
- Sulindac
- Sulphanilamide
- Sulpiride
- Sultamicillin
- Sultimicllin
- Sumatriptan
- Sunitinib
- Suvorexant
