Mechanism of Action
Imidazole antifungal that alters the fungal cell membrane; interacts with 14-alpha demethylase (an enzyme necessary for conversion of lanosterol to ergosterol), inhibiting the synthesis of ergosterol which is an essential component of the membrane; increases cell permeability causing leakage of cellular contents
Absorption
Tinea pedis
Peak plasma concentration: 0.4 ng/mL (first dose); 0.93 ng/mL (final dose)
Peak plasma time: 16.9 hr (first dose); 5.8 hr (final dose)
AUC: 6.88 ng•hr/mL (first dose); 18.74 ng•hr/mL (final dose)
Tinea cruris
Peak plasma time: 21 hr (first dose); 6.5 hr (final dose)
Peak plasma concentration: 4.91 ng/mL (first dose); 7.36 ng/mL (final dose)
AUC: 85.1 ng•hr/mL (first dose); 121.74 ng•hr/mL (final dose)
Distribution
Protein bound: >99%