Comparative Pharmacology
Head-to-head clinical analysis: SULFAMYLON versus SULFATRIM DS.
Peer-Reviewed Evidence
Head-to-head clinical analysis: SULFAMYLON versus SULFATRIM DS.
SULFAMYLON vs SULFATRIM-DS
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Sulfamylon (mafenide acetate) is a synthetic sulfonamide that exerts bacteriostatic activity against a wide range of Gram-negative and Gram-positive organisms. It acts by inhibiting the enzyme dihydropteroate synthase, which is involved in folate synthesis, thereby blocking bacterial DNA replication. Additionally, it may be bactericidal at high concentrations via inhibition of cell wall synthesis.
Sulfamethoxazole inhibits bacterial dihydropteroate synthase, blocking folate synthesis. Trimethoprim inhibits bacterial dihydrofolate reductase, inhibiting reduction of dihydrofolate to tetrahydrofolate. Sequential blockade of folate metabolism exerts bactericidal effect.
Topical: Apply a thin layer to the wound once or twice daily. Maximum coverage area should not exceed body surface area of 20%.
One double-strength tablet (160 mg trimethoprim/800 mg sulfamethoxazole) orally every 12 hours.
None Documented
None Documented
The terminal elimination half-life is approximately 7-8 hours in patients with normal renal function. In renal impairment, half-life may be prolonged, requiring dosing adjustments.
SMX: 9-11 hours (terminal); TMP: 8-10 hours; prolonged in renal impairment (creatinine clearance <30 mL/min: up to 20-30 hours for both).
Primarily renal excretion as unchanged drug and its metabolite; approximately 87% of a dose is recovered in urine within 24 hours as sulfacetamide and its deacetylated metabolite, with about 10% as unchanged drug. Less than 2% is excreted in feces.
Renal: 50-70% of total sulfamethoxazole (SMX) and 30% of trimethoprim (TMP) as unchanged drug via glomerular filtration and tubular secretion; 20-40% of SMX as N4-acetylated metabolite; biliary excretion accounts for <5%.
Category C
Category C
Sulfonamide Antibiotic
Sulfonamide Antibiotic