Can you take clonazepam as needed i hear you will get bad symptoms like fast heartbeat if not taken on daily basis or is vistaril (hydroxyzine) better for anxiety ?

Apples To Oranges: Clonazepam is a member of the benzodiazepine family, has some anticonvulsant properties. Clonazepam is indicated for the treatment of panic disorder and paroxysmal pain. A standing dose of a long acting medication, like clonazepam, is sometimes the best option, not PRN. Vistaril (hydroxyzine) is used as a sedative to treat anxiety. Apples to oranges