<prompt> drug directly acting on blood vessels isHydralizineVerapamilPropranololMethyldopa  <response>: 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 6e p547 