Comparative Pharmacology
Head-to-head clinical analysis: LOTRIMIN ULTRA versus PENLAC.
Peer-Reviewed Evidence
Head-to-head clinical analysis: LOTRIMIN ULTRA versus PENLAC.
LOTRIMIN ULTRA vs PENLAC
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Butenafine hydrochloride is a synthetic antifungal agent that inhibits the enzyme squalene epoxidase, thereby blocking the biosynthesis of ergosterol, an essential component of fungal cell membranes, leading to fungal cell death.
Ciclopirox, a hydroxypyridone antifungal, inhibits the uptake of essential elements and disrupts fungal cell membrane integrity by chelating polyvalent cations (Fe3+, Al3+). It also inhibits fungal enzymes involved in energy production and detoxification processes.
Adults: Apply butenafine hydrochloride 1% cream topically once daily for 7 days for tinea pedis; for tinea cruris and tinea corporis, apply once daily for 14 days.
Apply a thin layer to affected nails once daily, preferably at bedtime or 8 hours before washing. Use the provided applicator to apply to the entire nail plate and under the nail tip. Treatment duration is up to 48 weeks.
None Documented
None Documented
Terminal elimination half-life is approximately 24-48 hours (range 20-50 hours), supporting once-daily topical application.
Terminal elimination half-life is 17–21 hours in patients with normal renal function; prolonged in renal impairment (up to 40-50 hours in severe renal failure)
Primarily fecal (approx. 80%) as unchanged drug and metabolites; renal excretion accounts for <10% of the dose.
Primarily excreted renally as unchanged drug; approximately 90% of absorbed dose recovered in urine within 24 hours; minimal biliary/fecal elimination (<5%)
Category C
Category C
Topical Antifungal
Topical Antifungal