Norverapamil (hydrochloride) (Standard) is the analytical standard of Norverapamil (hydrochloride). This product is intended for research and analytical applications. Norverapamil hydrochloride (()-Norverapamil hydrochloride), an N-demethylated metabolite of Verapamil, is a L-type calcium channel blocker and a P-glycoprotein (P-gp) function inhibitor[1][2].