Comparative Pharmacology
Head-to-head clinical analysis: LANTRISUL versus NITROFURANTOIN MACROCRYSTALLINE.
Peer-Reviewed Evidence
Head-to-head clinical analysis: LANTRISUL versus NITROFURANTOIN MACROCRYSTALLINE.
LANTRISUL vs NITROFURANTOIN MACROCRYSTALLINE
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Lantrisul (sulfadimethoxine) is a sulfonamide antibiotic that inhibits bacterial synthesis of dihydrofolic acid by competing with para-aminobenzoic acid (PABA) for the enzyme dihydropteroate synthase, thereby blocking folic acid synthesis and ultimately nucleic acid production in susceptible bacteria.
Nitrofurantoin is reduced by bacterial flavoproteins to reactive intermediates that inhibit multiple bacterial enzymes involved in carbohydrate metabolism, including acetyl-CoA synthetase, and disrupt cell wall synthesis.
Intravenous: 3 mg/kg every 8 hours for 14 days, then 5 mg/kg every 12 hours for 14 days; oral: 800 mg (10 mg/kg) twice daily after intravenous phase.
100 mg orally twice daily for 5-7 days (uncomplicated UTI); 100 mg orally every 12 hours for 10-14 days (pyelonephritis: not first-line).
None Documented
None Documented
Terminal elimination half-life is 18 hours (range 16-20 h). This supports once-daily dosing; steady-state achieved after 3-4 days.
Terminal half-life: 20-60 minutes (short, requires q6h dosing for therapeutic efficacy).
Approximately 70% renal excretion as unchanged drug, 15% fecal elimination via biliary secretion, 10% metabolized to inactive glucuronide conjugate eliminated renally, 5% other minor pathways.
Renal: 30-40% excreted unchanged in urine. Biliary/fecal: minimal; remainder metabolized or eliminated via other routes.
Category C
Category D/X
Antibiotic
Antibiotic