Comparative Pharmacology
Head-to-head clinical analysis: MAFENIDE ACETATE versus POLYSPORIN.
Peer-Reviewed Evidence
Head-to-head clinical analysis: MAFENIDE ACETATE versus POLYSPORIN.
MAFENIDE ACETATE vs POLYSPORIN
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Mafenide acetate is a sulfonamide antibiotic that inhibits bacterial folic acid synthesis by competitively antagonizing para-aminobenzoic acid (PABA), thereby preventing bacterial growth. It has broad-spectrum activity against gram-negative and gram-positive organisms, including Pseudomonas aeruginosa.
Polysporin is a combination of polymyxin B and bacitracin. Polymyxin B disrupts bacterial cell membrane by binding to lipopolysaccharides, increasing permeability. Bacitracin inhibits bacterial cell wall synthesis by interfering with dephosphorylation of the lipid carrier in peptidoglycan synthesis.
Apply topically as a thin layer to affected areas once or twice daily. The dosage form is an 11.1% cream or solution. The cream is applied using a sterile gloved hand; the solution is applied with a sterile spray or brush.
Apply a thin layer topically to the affected area 1 to 3 times daily. If using the ointment, cover with a sterile bandage if desired.
None Documented
None Documented
Approximately 45 minutes (range 30-60 minutes) for the parent compound; the metabolite p-CBS has a longer half-life of about 4 hours.
Polymyxin B: 6–7 hours (impaired renal function: prolonged). Bacitracin: 1.5 hours (topical; not systemically absorbed).
Renal: approximately 80% excreted unchanged in urine; the remainder is metabolized to p-carboxybenzene sulfonamide (p-CBS) which is also renally excreted.
Polysporin (polymyxin B/bacitracin) ophthalmic/otic/topical: Minimal systemic absorption. Renal elimination for absorbed fraction: <1% of dose.
Category C
Category C
Topical Antibiotic
Topical Antibiotic