Flunarizine (dihydrochloride) (Standard) is the analytical standard of Flunarizine (dihydrochloride). This product is intended for research and analytical applications. Flunarizine dihydrochloride is a potent dual Na+/Ca2+ channel (T-type) blocker. Flunarizine dihydrochloride is a D2 dopamine receptor antagonist. Flunarizine dihydrochloride shows anticonvulsive and antimigraine activity, and peripheral vasodilator effects[1][2][3][4][5].