Comparative Pharmacology
Head-to-head clinical analysis: GENTAK versus NEOMYCIN AND POLYMYXIN B SULFATES AND HYDROCORTISONE.
Peer-Reviewed Evidence
Head-to-head clinical analysis: GENTAK versus NEOMYCIN AND POLYMYXIN B SULFATES AND HYDROCORTISONE.
GENTAK vs NEOMYCIN AND POLYMYXIN B SULFATES AND HYDROCORTISONE
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
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.
Neomycin is an aminoglycoside antibiotic that binds to the 30S ribosomal subunit, inhibiting bacterial protein synthesis. Polymyxin B is a cationic detergent antibiotic that disrupts bacterial cell membrane integrity by interacting with phospholipids. Hydrocortisone is a corticosteroid that suppresses inflammation by inhibiting phospholipase A2, reducing prostaglandin and leukotriene synthesis.
Gentamicin 3-5 mg/kg IV or IM once daily; alternatively, 1.5-2.5 mg/kg IV or IM every 8 hours.
Instill 3 to 4 drops into the affected ear(s) 3 to 4 times daily. For otic suspension in adults.
None Documented
None Documented
2–3 hours in adults with normal renal function; prolonged to 24–60 hours in severe renal impairment (CrCl <10 mL/min).
Neomycin: 2-3 hours (in adults with normal renal function); may accumulate in renal impairment. Polymyxin B: 6-8 hours (prolonged in renal impairment: up to 36 hours). Hydrocortisone: 1.2-1.5 hours (terminal).
Renal excretion of unchanged drug accounts for >90% of elimination; <5% biliary/fecal.
Neomycin: >90% unchanged in feces after oral administration; negligible renal excretion. Polymyxin B: 60% renal excretion of unchanged drug; remainder nonrenal. Hydrocortisone: primarily hepatic metabolism, <5% renal excretion unchanged.
Category C
Category A/B
Aminoglycoside Antibiotic
Aminoglycoside Antibiotic