Sebamed Anti-Dandruff pH 5.5 Shampoo is designed to be mild and suitable for sensitive scalps, so it can generally be used frequently. If your scalp is oily and you have dandruff, daily use may help in the initial days to control oil and flakes. However, most dermatologists recommend using anti-dandruff shampoos 2–3 times a week once symptoms improve, as excessive washing may cause dryness or irritation. If you notice itching, redness, or worsening dandruff, stop daily use and consult a dermatologist for personalised advice.