Betaxolol is metoprolol tartrate, and the specific price is between $5 and $30, and the price varies significantly from manufacturer to manufacturer with different specifications. Metoprolol is a beta-blocker, which can be used clinically to treat high blood pressure, and can also be used in the treatment of tachyarrhythmias, such as sinus tachycardia, due to its role in slowing the heart rate. There are many manufacturers producing metoprolol, there are many domestic manufacturers, there are also imported drugs, drugs and there are different specifications, resulting in a relatively large difference in price, the price is between 5 to 30 dollars, the specific price should be based on the specifications of the product and the manufacturer. Adverse effects of Metoprolol include dizziness, nausea, vomiting, cold extremities, bradycardia, dyspnea and so on. It is contraindicated in patients with hypersensitivity to the components of the drug, severe bradycardia, sick sinus node syndrome, decompensated heart failure, cardiogenic shock, bronchial asthma, atrioventricular block of the 2nd degree and 3rd degree. Metoprolol should be used under the guidance of a physician, go to a regular pharmacy or medical institution to buy drugs, not self-medication.