Comparative Pharmacology
Head-to-head clinical analysis: POLYCILLIN versus STAPHCILLIN.
Peer-Reviewed Evidence
Head-to-head clinical analysis: POLYCILLIN versus STAPHCILLIN.
POLYCILLIN vs STAPHCILLIN
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Polycillin (ampicillin) is a beta-lactam antibiotic that inhibits bacterial cell wall synthesis by binding to penicillin-binding proteins (PBPs), disrupting peptidoglycan cross-linking, leading to cell lysis.
Semisynthetic penicillin; inhibits bacterial cell wall synthesis by binding to penicillin-binding proteins (PBPs), inhibiting transpeptidation, and activating autolytic enzymes.
250-500 mg orally every 6 hours or 500 mg intravenously every 4-6 hours for moderate to severe infections.
1-2 g IV every 4-6 hours.
None Documented
None Documented
Terminal elimination half-life is 0.5-1 hour in adults with normal renal function; prolonged to 7-10 hours in anuria.
0.5-1 hour in adults with normal renal function; prolonged to 2-4 hours in renal impairment. Infants: 1-2 hours.
Renal excretion of unchanged drug accounts for 60-80% via glomerular filtration and tubular secretion; 20-40% is hepatically metabolized and eliminated in bile/feces.
Primarily renal (70-90% as unchanged drug via glomerular filtration and tubular secretion); minor biliary excretion (<5%) and fecal elimination (<1%).
Category C
Category C
Penicillin Antibiotic
Penicillin Antibiotic