Concor 5 mg Tablet belongs to a group of medicines called beta-blockers. It is used to treat high blood pressure (hypertension) angina (heart-related chest pain) irregular heart rhythms (arrhythmia). It also helps to prevent future heart attacks and stroke and to prevent migraine. Concor 5 mg Tablet is also used to relieve the symptoms caused by an overactive thyroid gland. It may be prescribed alone or together with other medications. The dose and frequency depend on what you are taking it for and the severity of your condition.