Systopic Laboratories Pvt. Ltd. Manufactures Composition of 400mg Fluconazole Medicine for Pityriasis Versicolor. Systopic Laboratories Pvt. Ltd. Supplies innovative products aimed to deliver better therapeutic solutions. Composition of 400mg Fluconazole Medicine for Pityriasis Versicolor inhibits the fungal cytochrome P450 enzyme 14? demethylase. Composition of 400mg Fluconazole Medicine for Pityriasis Versicolor prevents the conversion of lanosterol to ergosterol, an essential component of the fungal cytoplasmic membrane, and subsequent accumulation of 14?-methyl sterols. Fluconazole is primarily fungistatic. This can be available in the packet of 10 tabs/box [ 2 X 5]. It is avialble in the brand name of AF-400.