Lopressor is used primarily to treat high blood pressure and angina symptoms, as well as to improve survival following a heart attack. The medicine has not been approved for use in children, but it may be used off-label to treat several conditions seen in children. For example, Lopressor may be used in children with Marfan syndrome to slow the progression of aortic dilation (widening of the aorta). Some other off-label Lopressor uses include treating hyperthyroidism or anxiety and preventing migraines.
In previous clinical studies, Lopressor has been shown to significantly lower systolic and diastolic blood pressure. The higher the dose of Lopressor, the greater the drop in blood pressure is expected to be. By lowering blood pressure, Lopressor can also decrease the risks that occur with long-term high blood pressure (see Effects of High Blood Pressure). Lopressor does not, however, cure high blood pressure.