(+-)-p-(1-Hydroxy-4-(4-(hydroxydiphenylmethyl)piperidino)butyl)-alpha-methylhydratropic acid hydrochloride 138452-21-8 153439-40-8 Allegra Benzeneacetic acid, 4-(1-hydroxy-4-(4-(hydroxydiphenylmethyl)-1-piperidinyl)butyl)-alpha,alpha-dimethyl-, hydrochloride Carboxyterfenadine hydrochloride Fexofenadine hydrochloride Fexofenadine hydrochloride [USAN] MDL 16,455A Telfast Terfenadine carboxylate hydrochloride