astemizole

noun

as·tem·i·zole | \ a-ˈstem-ə-ˌzōl, ə-, -ˌzȯl

Medical Definition of astemizole

: an antihistamine C₂₈H₃₁FN₄O now withdrawn from use because of its link to ventricular arrythmias and cardiac arrest — see hismanal