- Salmeterol
- Sarafem
- Selegiline
- Serevent Diskus
- Serophene
- Seroquel
- Sertraline
- Sildenafil
- Sildenafil
- Simvastatin
- Sinemet
- Sinequan
- Singulair
- Sitagliptin
- Skelaxin
- Soma
- Sominex
- Sotalol
- Spiriva
- Spironolactone
- Starlix
- Strattera
- Stromectol
- Sucralfate
- Sulfamethoxazole + Trimethoprim
- Sulfasalazine
- Sumatriptan
- Sumycin
- Suprax
- Sustiva
- Symmetrel
- Synalar
- Synthroid
