Fexofenadine is sold under the brand name Allegra. It is a selective peripheral H1 blocker. It is classified as a second-generation antihistamine because it is less able to pass the blood–brain barrier and causes lesser sedation, as compared to first-generation antihistamines. It is on the World Health Organization's List of Essential Medicines. Fexofenadine has been manufactured in generic form since 2011.