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