Comparative Pharmacology
Head-to-head clinical analysis: BACITRACIN NEOMYCIN POLYMYXIN versus GENTAK.
Peer-Reviewed Evidence
Head-to-head clinical analysis: BACITRACIN NEOMYCIN POLYMYXIN versus GENTAK.
BACITRACIN-NEOMYCIN-POLYMYXIN vs GENTAK
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Bacitracin inhibits bacterial cell wall synthesis by interfering with dephosphorylation of the lipid carrier that transports peptidoglycan precursors. Neomycin and polymyxin B are aminoglycoside and polypeptide antibiotics, respectively; neomycin binds to the 30S ribosomal subunit, causing misreading of mRNA and inhibiting protein synthesis, while polymyxin B disrupts bacterial cell membrane integrity by interacting with lipopolysaccharides and phospholipids, leading to increased permeability and cell death.
Gentamicin is an aminoglycoside antibiotic that binds to the 30S ribosomal subunit of susceptible bacteria, causing misreading of mRNA and inhibiting protein synthesis, leading to bacterial cell death.
Apply topically to affected area 2-5 times daily.
Gentamicin 3-5 mg/kg IV or IM once daily; alternatively, 1.5-2.5 mg/kg IV or IM every 8 hours.
None Documented
None Documented
Bacitracin: 1.5 hours (prolonged in renal impairment); Neomycin: 2-3 hours (accumulates with renal dysfunction); Polymyxin B: 6-9 hours (increased in renal impairment).
2–3 hours in adults with normal renal function; prolonged to 24–60 hours in severe renal impairment (CrCl <10 mL/min).
Bacitracin: primarily renal (>90% unchanged); Neomycin: renal (30-50% unchanged) with non-renal clearance; Polymyxin: renal excretion of parent drug (60-80% unchanged) with some biliary and fecal elimination.
Renal excretion of unchanged drug accounts for >90% of elimination; <5% biliary/fecal.
Category A/B
Category C
Aminoglycoside Antibiotic
Aminoglycoside Antibiotic