to use the shampoo, apply it to your scalp and hair, rub vigorously, and allow it to sit for five minutes so that the ingredients can work before rinsing it out. Dandruff
shampoo should be used every few days, and
you may need to try several shampoos before you find one which works. You will also need to use it routinely to prevent recurrence, and you may find that a dandruff shampoo becomes ineffective at a certain point, in which case you will need to try a new product.