α-?[3-?[[2-?(3,?4-?Dimethoxyphenyl)?ethyl]?methylamino]?propyl]?-?3,?4-?dimethoxy-?α-?propylbenzeneacetonitrile (Verapamil EP Impurity O) is an impurity of Verapamil (V125000), a calcium channel blocker, adrenergic antagonist (1). Antihypertensive; antianginal; antiarrhythmic (2) (class IV).
