For the treatment of candidiasis (a yeast-like fungal infection) of the vulva and vagina.
Terconazole is a triazole antifungal agent available for intravaginal use. It is structurally related to imidazole-derivative antifungal agents, although terconazole and other triazoles have 3 nitrogens in the azole ring. By inhibiting the 14-alpha-demethylase (lanosterol 14-alpha-demethylase), Terconazole inhibits ergosterol synthesis. Depletion of ergosterol in fungal membrane disrupts the structure and many functions of fungal membrane leading to inhibition of fungal growth.
Mode of Action:
Terconazole may exert its antifungal activity by disrupting normal fungal cell membrane permeability. Terconazole and other triazole antifungal agents inhibit cytochrome P450 14-alpha-demethylase in susceptible fungi, which leads to the accumulation of lanosterol and other methylated sterols and a decrease in ergosterol concentration. Depletion of ergosterol in the membrane disrupts the structure and function of the fungal cell leading to a decrease or inhibition of fungal growth.
Systemically absorbed drug appears to be rapidly and extensively metabolized. Terconazole primarily undergoes oxidatative N- and O-dealkylation, dioxolane ring cleavage, and conjugation.
The oral LD50 values were found to be 1741 and 849 mg/kg for the male and female in rat.
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