Comparative Pharmacology
Head-to-head clinical analysis: PENICILLIN G SODIUM versus UNIPEN.
Peer-Reviewed Evidence
Head-to-head clinical analysis: PENICILLIN G SODIUM versus UNIPEN.
PENICILLIN G SODIUM vs UNIPEN
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Penicillin G inhibits bacterial cell wall synthesis by binding to penicillin-binding proteins (PBPs), inhibiting transpeptidase activity, and activating autolytic enzymes.
Unipen (nafcillin) is a penicillinase-resistant penicillin that inhibits bacterial cell wall synthesis by binding to penicillin-binding proteins (PBPs), blocking transpeptidation and autolysin inhibition.
2-4 million units intravenously every 4 hours for moderate to severe infections; up to 24 million units/day for severe infections (e.g., meningitis, endocarditis).
500 mg to 2 g orally or intravenously every 4 to 6 hours; maximum 12 g/day IV for serious infections.
None Documented
None Documented
30-60 minutes in normal renal function; prolonged to 7-10 hours in anuria.
0.5-1 hour in normal renal function; prolonged to 7-10 hours in anuria or severe renal impairment.
Primarily renal (60-90% unchanged) via glomerular filtration and tubular secretion; minor biliary/fecal (<10%).
Renal: 70-90% unchanged via tubular secretion and glomerular filtration; biliary: minor (<10%); fecal: minimal.
Category A/B
Category C
Penicillin Antibiotic
Penicillin Antibiotic