The drugs called beta blockers are widely used in treatment of a variety of conditions that are common in the elderly. They have an effect on the heart rate and on the blood vessels. They are extensively used in the treatment of angina (heart pain), after heart attacks, in the treatment of high blood pressure, and for patients with heart failure. These drugs are also used in the prevention of migraine headaches, for the treatment of some kinds of anxiety, and for parkinsonism.