Comparative Pharmacology
Head-to-head clinical analysis: FOSFOMYCIN TROMETHAMINE versus ZOSYN.
Peer-Reviewed Evidence
Head-to-head clinical analysis: FOSFOMYCIN TROMETHAMINE versus ZOSYN.
FOSFOMYCIN TROMETHAMINE vs ZOSYN
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Fosfomycin inhibits bacterial cell wall synthesis by inactivating the enzyme UDP-N-acetylglucosamine enolpyruvyl transferase (MurA), which catalyzes the first step of peptidoglycan biosynthesis.
Piperacillin, a semisynthetic penicillin, inhibits bacterial cell wall synthesis by binding to penicillin-binding proteins (PBPs). Tazobactam, a beta-lactamase inhibitor, inactivates beta-lactamases, preventing piperacillin degradation.
3 g orally once as a single dose for uncomplicated urinary tract infection.
3.375 g (piperacillin 3 g / tazobactam 0.375 g) intravenously every 6 hours over 30 minutes; for nosocomial pneumonia, 4.5 g intravenously every 6 hours.
None Documented
None Documented
Terminal elimination half-life is 5.7 hours (range 3-8 hours) in patients with normal renal function; approximately 50 hours in end-stage renal disease (CrCl <10 mL/min).
Piperacillin ~0.7-1.2 h; tazobactam ~0.7-1.0 h; extended in renal impairment (piperacillin up to 3.3 h, tazobactam up to 4.7 h in CrCl <20 mL/min)
Primarily excreted unchanged in urine via glomerular filtration (approximately 90% of absorbed dose within 24-48 hours); small amount (approximately 10%) excreted in feces via biliary elimination.
Primarily renal; piperacillin 68% unchanged, tazobactam 80% unchanged; biliary/fecal excretion <10%
Category A/B
Category C
Antibiotic
Antibiotic