Comparative Pharmacology
Head-to-head clinical analysis: NEOMYCIN AND POLYMYXIN B SULFATE versus NETROMYCIN.
Peer-Reviewed Evidence
Head-to-head clinical analysis: NEOMYCIN AND POLYMYXIN B SULFATE versus NETROMYCIN.
NEOMYCIN AND POLYMYXIN B SULFATE vs NETROMYCIN
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Neomycin is an aminoglycoside antibiotic that binds to the 30S ribosomal subunit, causing misreading of mRNA and inhibiting protein synthesis. Polymyxin B sulfate is a cationic detergent that disrupts bacterial cell membrane permeability by interacting with phospholipids, leading to cell death.
Netromycin is an aminoglycoside antibiotic that binds to the 30S ribosomal subunit, causing misreading of mRNA and inhibition of protein synthesis in bacteria.
For irrigation of urinary bladder: 1 mL of solution containing 40 mg neomycin and 200,000 units polymyxin B per mL diluted in 1 liter of 0.9% sodium chloride, instilled via continuous irrigation at a rate of 1 liter per 24 hours. For topical use: apply thin layer to affected area 2-4 times daily.
4-6 mg/kg IV once daily for serious infections; 1.5-2 mg/kg IV every 8 hours for gram-negative infections. Administered as intravenous infusion over 30-60 minutes.
None Documented
None Documented
Neomycin: 2-3 hours (normal renal function), prolonged to 24-48 hours in renal impairment; Polymyxin B: 4.5-6 hours (normal renal function), extended significantly in renal failure.
Terminal elimination half-life is 2-3 hours in adults with normal renal function, but may extend to 24-48 hours in patients with impaired renal function.
Renal: ~90-95% (neomycin, polymyxin B) unchanged; fecal: 5-10% (biliary excretion negligible).
Renal excretion of unchanged drug accounts for 80-90% of elimination via glomerular filtration; biliary/fecal elimination is minimal (<5%).
Category A/B
Category C
Aminoglycoside Antibiotic
Aminoglycoside Antibiotic