terfenadine

Is Terfenadine An Antihistamine? Terfenadine is an antihistamine recently approved for use in the U.S. Terfenadine possesses a unique chemical structure when compared with other antihistamines. It is a selective inhibitor of H1-receptors with little or no anticholinergic, antiserotoninergic, or antiadrenergic effects. What generation is terfenadine? With the announced withdrawal of terfenadine from the U.S.