Comparative Pharmacology
Head-to-head clinical analysis: AMPICILLIN AND SULBACTAM versus AUGMENTIN 125.
Peer-Reviewed Evidence
Head-to-head clinical analysis: AMPICILLIN AND SULBACTAM versus AUGMENTIN 125.
AMPICILLIN AND SULBACTAM vs AUGMENTIN '125'
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Ampicillin inhibits bacterial cell wall synthesis by binding to penicillin-binding proteins (PBPs), inhibiting transpeptidase activity. Sulbactam is a β-lactamase inhibitor that irreversibly inhibits a broad range of β-lactamases, preventing degradation of ampicillin.
Amoxicillin inhibits bacterial cell wall synthesis by binding to penicillin-binding proteins (PBPs), inhibiting transpeptidation and autolysin activation. Clavulanate is a beta-lactamase inhibitor that irreversibly binds to and inactivates beta-lactamases, preventing hydrolysis of amoxicillin.
1.5-3 g (ampicillin 1-2 g + sulbactam 0.5-1 g) IV/IM every 6 hours. Maximum daily dose of sulbactam is 4 g.
One AUGMENTIN '125' tablet (amoxicillin 125 mg, clavulanate 31.25 mg) orally every 8 hours for mild to moderate infections.
None Documented
None Documented
Ampicillin: 1-1.8 hours; sulbactam: 1-1.5 hours. Prolonged in renal impairment (e.g., creatinine clearance <30 mL/min: up to 8-12 hours).
Amoxicillin: 1.0-1.3 hours (prolonged in renal impairment; up to 7-20 hours in anuria). Clavulanate: 0.9-1.2 hours (increased in renal impairment).
Primarily renal (70-75% unchanged ampicillin, 75-80% unchanged sulbactam). Biliary excretion accounts for ~25% of ampicillin and ~20% of sulbactam. Fecal elimination is minor (<5%).
Amoxicillin: ~50-70% excreted unchanged in urine via glomerular filtration and tubular secretion; clavulanate: ~30-50% excreted unchanged in urine. Small amounts eliminated in bile and feces.
Category A/B
Category C
Penicillin Antibiotic
Penicillin Antibiotic