Comparative Pharmacology
Head-to-head clinical analysis: STAPHCILLIN versus VERSAPEN K.
Peer-Reviewed Evidence
Head-to-head clinical analysis: STAPHCILLIN versus VERSAPEN K.
STAPHCILLIN vs VERSAPEN-K
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Semisynthetic penicillin; inhibits bacterial cell wall synthesis by binding to penicillin-binding proteins (PBPs), inhibiting transpeptidation, and activating autolytic enzymes.
VERSAPEN-K (hetacillin potassium) is a prodrug that is hydrolyzed to ampicillin, which inhibits bacterial cell wall synthesis by binding to penicillin-binding proteins (PBPs), inhibiting transpeptidase activity, and disrupting peptidoglycan cross-linking.
1-2 g IV every 4-6 hours.
250-500 mg intramuscularly or intravenously every 6 hours for moderate infections; 1-2 g every 6 hours for severe infections.
None Documented
None Documented
0.5-1 hour in adults with normal renal function; prolonged to 2-4 hours in renal impairment. Infants: 1-2 hours.
0.8-1.5 hours in adults with normal renal function (prolonged to 6-20 hours in severe renal impairment; dosing adjustment required when CrCl <30 mL/min).
Primarily renal (70-90% as unchanged drug via glomerular filtration and tubular secretion); minor biliary excretion (<5%) and fecal elimination (<1%).
Renal: 60-80% unchanged via glomerular filtration and tubular secretion; biliary: 15-20% as active drug; fecal: <5%.
Category C
Category C
Penicillin Antibiotic
Penicillin Antibiotic