Sulfamethoxazole 800mg, trimethoprim 160mg; scored tabs ... dihydrofolate reductase. 1 DS tab, 2 regular tabs, or 20mL of susp every 12hrs for 5 days (shigellosis, travelers' diarrhea), or ...
PJP treatment: 15–20mg/kg per day of trimethoprim (75–100mg/kg per day of sulfamethoxazole) in 4 divided doses at 6-hour intervals for 14–21 days; PJP prophylaxis: one DS tab daily.