Comparative Pharmacology
Head-to-head clinical analysis: SULFAMETHOXAZOLE AND TRIMETHOPRIM SINGLE STRENGTH versus TIMENTIN.
Peer-Reviewed Evidence
Head-to-head clinical analysis: SULFAMETHOXAZOLE AND TRIMETHOPRIM SINGLE STRENGTH versus TIMENTIN.
SULFAMETHOXAZOLE AND TRIMETHOPRIM SINGLE STRENGTH vs TIMENTIN
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Sulfamethoxazole inhibits bacterial dihydropteroate synthase, blocking folate synthesis. Trimethoprim inhibits bacterial dihydrofolate reductase, blocking tetrahydrofolate synthesis. Together, they provide sequential blockade of folate metabolism, leading to bactericidal activity.
Timentin is a combination of ticarcillin, a penicillin-class antibiotic that inhibits bacterial cell wall synthesis by binding to penicillin-binding proteins (PBPs), and clavulanic acid, a beta-lactamase inhibitor that irreversibly inhibits a wide range of beta-lactamase enzymes, thereby preventing degradation of ticarcillin and extending its spectrum to include beta-lactamase-producing organisms.
1 double-strength tablet (800 mg sulfamethoxazole/160 mg trimethoprim) orally every 12 hours for most infections; single-strength tablet (400 mg/80 mg) is used for prophylaxis: 1 tablet orally daily.
3.1 g (ticarcillin 3 g + clavulanic acid 0.1 g) IV every 4-6 hours; for moderate infections, 3.1 g IV every 6 hours; for severe infections, 3.1 g IV every 4 hours.
None Documented
None Documented
Sulfamethoxazole: 10-12 hours (prolonged in renal impairment); Trimethoprim: 8-11 hours (prolonged in hepatic impairment).
Ticarcillin: ~1.1 hours; clavulanate: ~1.0 hours. Prolonged in renal impairment (CrCl <10 mL/min: ticarcillin half-life ~13 hours).
Sulfamethoxazole: primarily renal (70-90% as unchanged drug and acetylated metabolite); Trimethoprim: renal (50-60% unchanged, rest as metabolites); small biliary/fecal elimination (<5% each).
Renal: 60-80% ticarcillin and 50-70% clavulanate excreted unchanged in urine via glomerular filtration and tubular secretion. Fecal: minimal.
Category D/X
Category C
Antibiotic
Antibiotic