Comparative Pharmacology
Head-to-head clinical analysis: SULFATRIM versus THIOSULFIL.
Peer-Reviewed Evidence
Head-to-head clinical analysis: SULFATRIM versus THIOSULFIL.
SULFATRIM vs THIOSULFIL
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Sulfatrim is a combination of sulfamethoxazole, a dihydropteroate synthase inhibitor that blocks folate synthesis, and trimethoprim, a dihydrofolate reductase inhibitor that blocks reduction of dihydrofolate to tetrahydrofolate, resulting in sequential inhibition of bacterial folate metabolism.
Thiosulfil (sulfamethizole) is a sulfonamide antibiotic that inhibits bacterial dihydropteroate synthase, blocking folic acid synthesis and thereby nucleic acid production.
160 mg trimethoprim / 800 mg sulfamethoxazole (1 DS tablet) orally every 12 hours for 10-14 days.
500 mg orally twice daily for 10-14 days.
None Documented
None Documented
Sulfamethoxazole: 9-11 hours (prolonged in renal impairment, e.g., up to 30 hours in severe renal failure). Trimethoprim: 8-10 hours (prolonged in hepatic impairment).
Terminal elimination half-life is 2-4 hours in patients with normal renal function (creatinine clearance >80 mL/min); prolonged to 20-50 hours in severe renal impairment (CrCl <30 mL/min).
Renal (70-80% as unchanged sulfamethoxazole and N4-acetylated metabolite; 30-40% as unchanged trimethoprim), biliary/fecal (20-30% sulfamethoxazole; 10-20% trimethoprim)
Renal: 70-90% as unchanged drug via glomerular filtration and tubular secretion. Biliary/fecal: <5%.
Category C
Category C
Sulfonamide Antibiotic
Sulfonamide Antibiotic