Betaxolol, also called metoprolol is a beta-blocker and the corresponding oral dose will be different depending on the disease being treated. If used for the treatment of hypertension, the starting dose is 50mg per dose and can be taken 2 times a day. If used for the treatment of angina pectoris, the starting dose is 50mg/d, which can also be given in 2 doses. If used for the treatment of myocardial infarction, patients can choose to apply betalactam injections, for example, three 5mg injections can be given slowly and then repeated at intervals of about 2 minutes. If used for the treatment of heart failure, patients are advised to start with 25mg or, if more severe cardiac insufficiency is present, to take 12.5mg.