Fexofenadine

Drug Details

Fexofenadine is an antihistamine medication, commonly known by the brand name Allegra, used to alleviate symptoms associated with allergies and hives in both adults and children. It is available over the counter in various forms, such as tablets, fast-melting tablets, and liquid. This drug can be taken once or twice daily, depending on the specific formulation. Fexofenadine starts working approximately two hours after administration, with effects lasting up to 24 hours. Unlike some other antihistamines, it is less likely to cause drowsiness. Possible side effects may include headache and dry mouth. Fexofenadine operates by blocking histamine, a natural substance in the body responsible for causing allergy symptoms like sneezing, runny nose, and itching. By inhibiting histamine, fexofenadine effectively relieves these symptoms, providing short-term relief.