Seldan Shampoo is an antifungal medication. It is used in the treatment of dandruff. It prevents the growth of fungi, which are responsible for causing dandruff on your scalp. Seldan Shampoo is for external use only. You should use it in the dose and duration as directed by your doctor. The amount you need, and how long you should take will depend on what you are being treated for. Do not leave it for too long, as long term contact may cause irritation or burning sensation. You should avoid getting in contact with your mouth, eyes, and nose. In case of accidental contact, wash it off with plenty of water. Keep using it regularly to get the most benefit. The most common side effects of this medicine include dry hair, hair loss, and hair discoloration. Speak with your doctor if you experience any of these side effects which bothers you. Your doctor may be able to suggest you reduce the side effects or suggest an alternative medicine.