Comparative Pharmacology
Head-to-head clinical analysis: GARAMYCIN versus NEOMYCIN POLYMYXIN B SULFATES BACITRACIN ZINC HYDROCORTISONE.
Peer-Reviewed Evidence
Head-to-head clinical analysis: GARAMYCIN versus NEOMYCIN POLYMYXIN B SULFATES BACITRACIN ZINC HYDROCORTISONE.
GARAMYCIN vs NEOMYCIN & POLYMYXIN B SULFATES & BACITRACIN ZINC & 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, causing misreading of mRNA and inhibition of protein synthesis, leading to bacterial cell death.
Neomycin, polymyxin B, and bacitracin are antibiotics that inhibit bacterial protein synthesis, disrupt cell membrane integrity, and interfere with cell wall synthesis, respectively. Hydrocortisone is a corticosteroid that suppresses inflammation by inhibiting phospholipase A2, reducing prostaglandin and leukotriene synthesis.
Gentamicin 3-5 mg/kg/day IV or IM in 3 divided doses every 8 hours for serious infections; may use once-daily dosing (5 mg/kg IV every 24 hours) for certain indications.
Apply to affected area 3-4 times daily. Not for use in eyes.
None Documented
None Documented
Terminal elimination half-life: 2-3 hours in adults with normal renal function; prolonged in renal impairment (up to 40-50 hours in anuria).
Neomycin: 2-3h (normal renal); polymyxin B: 4-6h (normal renal), prolonged to 2-3 days in renal impairment; bacitracin: ~1.5h after IM; hydrocortisone: 1.5-2h (plasma). Topical: systemic levels negligible.
Primarily renal (glomerular filtration); >90% excreted unchanged in urine within 24 hours. Minimal biliary/fecal elimination (<2%).
Neomycin: >90% renal (unchanged) after parenteral; polymyxin B: ~60% renal (unchanged) over 72h; bacitracin: >90% renal (unchanged) after IM; hydrocortisone: hepatic metabolism, metabolites renally eliminated (<1% unchanged). Topical: negligible systemic absorption across intact skin (except bacitracin may be minimally absorbed).
Category C
Category A/B
Aminoglycoside Antibiotic
Aminoglycoside Antibiotic