Sulfamethoxazole 800mg, trimethoprim 160mg; scored tabs. 1 DS tab or 2 regular tabs every 12 hours ... Renal impairment (CrCl 15–30mL/min): reduce dose by ½; CrCl <15mL/min: not recommended.

Sulfamethoxazole 400mg ... dihydrofolate reductase. 1 DS tab, 2 regular tabs, or 20mL of susp every 12hrs for 5 days (shigellosis, travelers' diarrhea), or 10–14 days (UTIs), or 14 days ...