Comparative Pharmacology
Head-to-head clinical analysis: PENBRITIN S versus POLYCILLIN N.
Peer-Reviewed Evidence
Head-to-head clinical analysis: PENBRITIN S versus POLYCILLIN N.
PENBRITIN-S vs POLYCILLIN-N
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Penicillinase-sensitive penicillin; inhibits bacterial cell wall synthesis by binding to penicillin-binding proteins (PBPs), inhibiting transpeptidase activity, and activating autolytic enzymes.
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.
250-500 mg orally every 6 hours or 500 mg-1 g intramuscularly/intravenously every 4-6 hours for moderate to severe infections.
1-2 g IV/IM every 4-6 hours
None Documented
None Documented
0.5-1 hour; prolonged in renal impairment (up to 7-10 hours in anuria).
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: 75-90% unchanged via glomerular filtration and tubular secretion; biliary/fecal: ~10%.
Renal: 60-80% unchanged via glomerular filtration and tubular secretion. Biliary: ~20% excreted in bile and feces. Small amount metabolized to penicilloic acid.
Category C
Category C
Penicillin Antibiotic
Penicillin Antibiotic