HI thanks for posting your query Dandruff is caused by a fungus Mallassezia Furfur . in your case it is very severe, so you need to follow this: apply a long contact antifungal lotion like noskurf overnight, alternate days Wash with tar based shampoo like Ionax-T lotion alternate days This may take about 15 days to 1 month to give visible results. once it decreases apply novale lotion twice a week, then once a week as maintainance therapy at times resistance develops to ketoconazole so use cyclopirox olamine based lotion instead of novale Zocon is safe antifungal and once a week dose does not normally cause side affects keraglo contains biotin and other antioxidants which are good for hair and have no side effects so tou can continue these . hope this helps you