drug directly acting on blood vessels is
Hydralazine is used with or without other medications to treat high blood pressure. Lowering high blood pressure helps prevent strokes, hea attacks, and kidney problems.Hydralazine is called a vasodilator. It works by relaxing blood vessels so blood can flow through the body more easily. Refer kDT 6/e p547
Hydralizine
Verapamil
Propranolol
Methyldopa
Cardiovascular system