Comparative Pharmacology
Head-to-head clinical analysis: BICILLIN L A versus PENICILLIN G POTASSIUM IN PLASTIC CONTAINER.
Peer-Reviewed Evidence
Head-to-head clinical analysis: BICILLIN L A versus PENICILLIN G POTASSIUM IN PLASTIC CONTAINER.
BICILLIN L-A vs PENICILLIN G POTASSIUM IN PLASTIC CONTAINER
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Penicillin G benzathine is a slow-release formulation that provides prolonged tissue concentrations. It inhibits bacterial cell wall synthesis by binding to penicillin-binding proteins (PBPs), inhibiting transpeptidation, and activating autolytic enzymes, leading to cell lysis.
Penicillin G is a beta-lactam antibiotic that inhibits bacterial cell wall synthesis by binding to penicillin-binding proteins (PBPs), inhibiting transpeptidation and activating autolytic enzymes.
1.2 million units intramuscularly as a single dose for treatment of streptococcal pharyngitis; for syphilis, 2.4 million units intramuscularly weekly for 1-3 weeks depending on stage.
2-4 million units IV every 4 hours for moderate to severe infections; up to 24 million units/day for serious infections (meningitis, endocarditis).
None Documented
None Documented
Terminal half-life: 30-60 hours (prolonged due to slow absorption from IM depot; clinically allows single-dose regimen for syphilis)
0.5–1 hour (normal renal function). Prolonged in renal impairment (up to 7–10 hours in anuria).
Renal: 60-90% unchanged; biliary/fecal: minor (<10%)
Renal: 60–90% unchanged via tubular secretion and glomerular filtration. Biliary/fecal: <10%.
Category C
Category A/B
Penicillin Antibiotic
Penicillin Antibiotic