Clemastine

Clemastine is an antihistamine used to help relieve allergy symptoms. It works by blocking histamine, a natural substance in the body that can trigger sneezing, runny nose, itching, and watery eyes.

It may be used for seasonal or year-round allergies and other allergic reactions. Clemastine can cause drowsiness and may slow reaction time, so caution is needed when driving, drinking alcohol, or taking other sedating medicines.