Comparative Pharmacology
Head-to-head clinical analysis: TRIMETHOPRIM versus TRIMPEX.
Peer-Reviewed Evidence
Head-to-head clinical analysis: TRIMETHOPRIM versus TRIMPEX.
TRIMETHOPRIM vs TRIMPEX
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Trimethoprim inhibits bacterial dihydrofolate reductase (DHFR), preventing the reduction of dihydrofolate to tetrahydrofolate, thereby inhibiting thymidine synthesis and bacterial DNA replication. It has bacteriostatic activity against susceptible organisms.
Inhibits dihydrofolate reductase, blocking the conversion of dihydrofolic acid to tetrahydrofolic acid, thereby inhibiting bacterial thymidine synthesis and DNA replication.
Adult: 100 mg orally twice daily or 200 mg once daily for uncomplicated UTI; for severe infections, up to 20 mg/kg/day in divided doses. IV: 10-20 mg/kg/day divided every 6-12 hours.
5 mg/kg orally every 6 hours for acute infections; 5 mg/kg orally every 12 hours for chronic urinary tract infections.
None Documented
None Documented
Clinical Note
moderateTrimethoprim + Teriflunomide
"The metabolism of Teriflunomide can be decreased when combined with Trimethoprim."
Clinical Note
moderateTrimethoprim + Sulfisoxazole
"The metabolism of Sulfisoxazole can be decreased when combined with Trimethoprim."
Clinical Note
moderateTrimethoprim + Cyclosporine
"The metabolism of Cyclosporine can be decreased when combined with Trimethoprim."
Clinical Note
moderateTrimethoprim + Fluconazole
Terminal elimination half-life is 8-12 hours in adults with normal renal function; prolonged to 20-40 hours in severe renal impairment (CrCl <15 mL/min).
8-11 hours; prolonged in renal impairment (creatinine clearance <10 mL/min: 20-40 hours)
Renal excretion: approximately 50-60% of the dose is excreted unchanged in urine via glomerular filtration and tubular secretion; about 10-20% as metabolites (conjugated and oxidized forms); biliary/fecal excretion accounts for less than 10%.
Renal: 40-70% as unchanged drug; biliary/fecal: minimal (10-15% as metabolites)
Category D/X
Category C
Antibiotic
Antibiotic
"The metabolism of Fluconazole can be decreased when combined with Trimethoprim."