For best results, use the shampoo as a course over several weeks, because visible flaking and scalp discomfort usually do not change after only one wash. Apply it to wet hair and focus the lather on the scalp, not only on the hair lengths, since dandruff flakes form at the scalp surface. Massage gently with the fingertips, then rinse thoroughly so no residue is left behind.
The product information states that anti-dandruff shampoos work gradually by helping reduce excessive scalp yeast activity associated with flaking and by softening and removing dead surface cells before they collect in the hair. Consistency matters: skipping between many different shampoos can make it harder to judge whether this one suits your scalp.
Once flaking and itch are better controlled, you may switch to a softer everyday shampoo and keep this one in the routine a few times per week as a supportive anti-dandruff wash. If your scalp becomes dry or uncomfortable, reduce frequency and avoid very hot water, aggressive scrubbing, and heavy styling products directly on the scalp, as these can worsen irritation in some people.