Comparative Pharmacology
Head-to-head clinical analysis: GRIS PEG versus NATACYN.
Peer-Reviewed Evidence
Head-to-head clinical analysis: GRIS PEG versus NATACYN.
GRIS-PEG vs NATACYN
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Griseofulvin binds to and disrupts microtubule function by interfering with the polymerization of tubulin, thereby inhibiting fungal cell mitosis and nucleic acid synthesis.
Natamycin is a polyene antifungal that binds to ergosterol in fungal cell membranes, increasing permeability and causing cell death.
For tinea capitis and other dermatophyte infections: 500 mg oral daily as a single dose or in divided doses. For more severe infections, up to 1 g daily in divided doses.
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.
None Documented
None Documented
Terminal elimination half-life 14-24 hours. With continuous therapy, time to steady-state is ~3-5 days.
Not well characterized due to minimal systemic absorption; estimated to be 2-3 hours in plasma if absorbed.
Primarily renal (as glucuronide conjugates): ~80%; fecal/biliary: ~10-15%; unchanged drug <1%.
Primarily fecal via biliary elimination; less than 5% renal excretion of absorbed dose.
Category C
Category C
Antifungal
Antifungal, Ophthalmic