Ketotifen

Ketotifen is an antihistamine and mast cell stabilizer used to help reduce the body’s allergic response. It is available in tablet form and as eye drops, depending on the product and intended use.

It may be used for allergic conditions and asthma prevention, not sudden asthma attacks. Common side effects can include drowsiness, dry mouth, and increased appetite. Follow your prescriber’s instructions and ask before using it if you are pregnant, breastfeeding, or taking other sedating medicines.