Generic Allegra is used for treating seasonal allergy symptoms such as sneezing, runny nose, itchy throat, or itchy, watery eyes. It is also used to treat hives and skin itching.
Generic Allegra-D extended-release tablets is an antihistamine and decongestant combination. The antihistamine works by blocking the effects of histamine, which cause allergy symptoms. The decongestant works by stimulating the body's natural response and reducing the swelling in the blood vessels that supply the mucous membrane, thereby decreasing nasal congestion.