SULCIN already contains selenium sulphide 2%, an active ingredient used to help reduce the visible appearance of dandruff by slowing the buildup of dead skin cells on the scalp. Because of that, it is best not to use it at the same time as multiple other active anti-dandruff or exfoliating scalp products unless a specialist has advised you to do so.
Combining several active shampoos, scalp peels, leave-on tonics or strong cleansing products can make the scalp feel dry, tight or irritated, especially if you are washing frequently. It can also make it difficult to know which product is responsible if your scalp improves or reacts poorly.
A practical approach is to keep the rest of your routine simple while using this shampoo: a mild non-active shampoo on alternate wash days if needed, conditioner on the lengths only, and styling products used sparingly near the roots. If you colour or chemically treat your hair, follow the advice from your hair professional and the shampoo packaging, as active scalp products can sometimes require extra care in a treated-hair routine.
Stop use if you notice unpleasant scalp reactions such as persistent burning, strong redness or worsening discomfort. For ongoing irritation, very sensitive skin, or uncertainty about which scalp product to use, seek advice from a qualified specialist.