Comparative Pharmacology
Head-to-head clinical analysis: NATACYN versus SELENIUM SULFIDE.
Peer-Reviewed Evidence
Head-to-head clinical analysis: NATACYN versus SELENIUM SULFIDE.
NATACYN vs SELENIUM SULFIDE
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Natamycin is a polyene antifungal that binds to ergosterol in fungal cell membranes, increasing permeability and causing cell death.
Selenium sulfide is an antifungal and cytostatic agent. It reduces sebum production and inhibits the growth of Malassezia species by interfering with fungal lipid metabolism and cell wall synthesis. The exact molecular mechanism is not fully elucidated.
One drop of 5% ophthalmic suspension into the conjunctival sac every 1-2 hours for 48 hours, then taper to one drop 4-6 times daily.
Topical: 2.5% lotion or shampoo applied to affected area once daily for 7 days; 1% shampoo used once or twice weekly for maintenance.
None Documented
None Documented
Not well characterized due to minimal systemic absorption; estimated to be 2-3 hours in plasma if absorbed.
Not established; due to negligible systemic absorption, a terminal half-life is not clinically relevant. If absorbed, selenium has a long biological half-life of approximately 65–115 days due to incorporation into selenoproteins.
Primarily fecal via biliary elimination; less than 5% renal excretion of absorbed dose.
Selenium sulfide is minimally absorbed after topical application. The small absorbed fraction is excreted renally as selenite or selenate, with fecal excretion of unabsorbed drug accounting for >90% of the dose.
Category C
Category A/B
Antifungal, Ophthalmic
Antifungal / Antiseborrheic