Comparative Pharmacology
Head-to-head clinical analysis: SELSUN versus SPORANOX.
Peer-Reviewed Evidence
Head-to-head clinical analysis: SELSUN versus SPORANOX.
SELSUN vs SPORANOX
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Selenium sulfide is an antifungal agent that inhibits the growth of Malassezia species by reducing selenium to elemental selenium, which is toxic to the fungus. It also reduces sebum production via unknown mechanisms.
Inhibits fungal cytochrome P450 (CYP450)-dependent lanosterol 14α-demethylase, blocking ergosterol synthesis and disrupting fungal cell membrane integrity.
Apply 5-10 mL of 2.5% selenium sulfide lotion to affected areas of scalp, lather with water, leave on for 2-3 minutes, then rinse thoroughly. Use twice weekly for 2 weeks, then once weekly for maintenance.
200 mg orally twice daily for 3-7 days; for onychomycosis: 200 mg orally once daily for 12 weeks.
None Documented
None Documented
Not well defined due to minimal systemic absorption; topical application yields negligible plasma levels.
The terminal elimination half-life of itraconazole ranges from 21 to 35 hours for single doses, increasing to approximately 34 to 42 hours at steady state. The half-life of the active metabolite, hydroxyitraconazole, is similar. This long half-life allows for once-daily or twice-daily dosing in most indications.
Selenium sulfide is minimally absorbed; absorbed portions are excreted renally (approx. 80-90%) and fecally (10-20%).
Itraconazole is extensively metabolized in the liver via CYP3A4 to active metabolites, including hydroxyitraconazole. The parent drug and metabolites are primarily excreted in feces (approximately 54%) and urine (approximately 35%), with less than 1% of the dose excreted unchanged in urine.
Category C
Category C
Antifungal/Antiseborrheic
Antifungal