Comparative Pharmacology
Head-to-head clinical analysis: PENICILLIN G POTASSIUM versus POLYCILLIN N.
Peer-Reviewed Evidence
Head-to-head clinical analysis: PENICILLIN G POTASSIUM versus POLYCILLIN N.
PENICILLIN G POTASSIUM vs POLYCILLIN-N
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Bactericidal: inhibits transpeptidases (penicillin-binding proteins) involved in bacterial cell wall synthesis, leading to cell lysis.
Ampicillin is a beta-lactam antibiotic that inhibits bacterial cell wall synthesis by binding to penicillin-binding proteins (PBPs), disrupting peptidoglycan cross-linking, and activating autolytic enzymes. It is bactericidal against susceptible organisms.
1-4 million units IV every 4-6 hours; maximum 24 million units/day
1-2 g IV/IM every 4-6 hours
None Documented
None Documented
0.5-1 hour in normal renal function; prolonged to 3-10 hours in anuria/end-stage renal disease.
Terminal elimination half-life: 0.5-1 hour (normal renal function); increases to 7-10 hours in anuria. Prolonged in neonates (2-4 hours).
Renal (60-90% as unchanged drug via tubular secretion and glomerular filtration); biliary (minor, <10%); fecal (minimal, <5%).
Renal: 60-80% unchanged via glomerular filtration and tubular secretion. Biliary: ~20% excreted in bile and feces. Small amount metabolized to penicilloic acid.
Category A/B
Category C
Penicillin Antibiotic
Penicillin Antibiotic