Medetomidine-13C,d3 (hydrochloride) is a deuterated labeled Medetomidine (hydrochloride). Medetomidine hydrochloride is an orally active α2-adrenoceptor agonist ( K i : 1.08 nM). Medetomidine hydrochloride has sedative and analgesic effects. Medetomidine hydrochloride can cause peripheral vasoconstriction through the activation of α2 adrenoceptors on blood vessels.