Comparative Pharmacology
Head-to-head clinical analysis: BICILLIN C R 900 300 versus PEN VEE K.
Peer-Reviewed Evidence
Head-to-head clinical analysis: BICILLIN C R 900 300 versus PEN VEE K.
BICILLIN C-R 900/300 vs PEN-VEE K
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Penicillin G benzathine and penicillin G procaine are beta-lactam antibiotics that inhibit bacterial cell wall synthesis by binding to penicillin-binding proteins (PBPs), disrupting peptidoglycan cross-linking, leading to cell lysis via autolytic enzymes. Synergistic action covers both susceptible Gram-positive cocci (e.g., Streptococcus pyogenes) and some Gram-negative cocci (e.g., Neisseria spp.).
Penicillin V binds to penicillin-binding proteins (PBPs) located on the bacterial cell wall, inhibiting the final transpeptidation step of peptidoglycan synthesis, leading to cell lysis.
Intramuscular injection: 1.2 mL (900,000 units penicillin G benzathine and 300,000 units penicillin G procaine) every 48 hours for 3 doses; for severe infections, up to 2.4 mL (1,800,000/600,000 units) as a single dose.
250-500 mg orally every 6-8 hours for mild to moderate infections; up to 2 g/day for severe infections.
None Documented
None Documented
0.5-1 hour for penicillin G; prolonged to 3-6 hours in renal impairment. Procaine component has no significant effect on elimination half-life
Terminal elimination half-life: 30-60 minutes in adults with normal renal function, prolonged to 3-10 hours in severe renal impairment.
Renal: 60-90% as unchanged drug; biliary/fecal: minor (less than 10%)
Renal excretion of unchanged drug via glomerular filtration and tubular secretion accounts for 60-90% of elimination; biliary/fecal elimination is minimal (<10%).
Category C
Category C
Penicillin Antibiotic
Penicillin Antibiotic