Comparative Pharmacology
Head-to-head clinical analysis: NITROFURANTOIN versus SEPTRA GRAPE.
Peer-Reviewed Evidence
Head-to-head clinical analysis: NITROFURANTOIN versus SEPTRA GRAPE.
NITROFURANTOIN vs SEPTRA GRAPE
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Nitrofurantoin is reduced by bacterial flavoproteins to reactive intermediates that inactivate or inhibit bacterial ribosomal proteins, DNA, RNA, and metabolic enzymes, leading to bacterial cell death.
Septra Grape (trimethoprim/sulfamethoxazole) inhibits bacterial folic acid synthesis via sequential blockade: sulfamethoxazole inhibits dihydropteroate synthase, and trimethoprim inhibits dihydrofolate reductase, leading to bactericidal activity.
100 mg orally twice daily for 5-7 days (uncomplicated UTI); 50-100 mg orally four times daily for 7 days (symptomatic uncomplicated UTI). Extended-release: 100 mg orally twice daily for 7 days.
160 mg trimethoprim / 800 mg sulfamethoxazole (1 double-strength tablet) orally every 12 hours.
None Documented
None Documented
Clinical Note
moderateNitrofurantoin + Norfloxacin
"The therapeutic efficacy of Norfloxacin can be decreased when used in combination with Nitrofurantoin."
Clinical Note
moderateNitrofurantoin + Teriflunomide
"The serum concentration of Teriflunomide can be increased when it is combined with Nitrofurantoin."
Clinical Note
moderateNitrofurantoin + Probenecid
"The serum concentration of Probenecid can be increased when it is combined with Nitrofurantoin."
Clinical Note
moderateNitrofurantoin + Rolapitant
Normal renal function: 20-60 minutes; impaired function: prolonged up to 1-2 hours, clinically significant due to urinary concentration requirement
Trimethoprim: 8-10 hours (renal impairment >24h). Sulfamethoxazole: 10-13 hours (acetylation phenotype; prolonged in renal impairment). Clinical: Dosing interval generally 12h; adjust CrCl <30 mL/min.
Renal: ~40% unchanged via glomerular filtration and tubular secretion, biliary/fecal: <1%
Renal: 50-70% unchanged (trimethoprim), 30-50% as N-acetyl metabolite; sulfamethoxazole: 70-80% as metabolites, 20-30% unchanged; biliary excretion minimal (<5% total).
Category D/X
Category C
Antibiotic
Antibiotic
"The serum concentration of Rolapitant can be increased when it is combined with Nitrofurantoin."