Betaxolol, generally referred to as metoprolol, is taken in half tablets that last about 3-4 hours in potency. There are two dosage forms of metoprolol, the regular type of metoprolol has a shorter half-life and its effects can last for 3-4 hours, it can be broken up and taken, you can take half a tablet at a time, and you need to take it 2 to 3 times a day. The other type of metoprolol is an extended-release tablet, which has a longer half-life and lasts for about 12-24 hours after taking it, but it can’t be broken open, so there is no such thing as taking half a tablet. Metoprolol has the effect of lowering blood pressure, antiarrhythmia, lowering heart rate, inhibiting ventricular remodeling, and anti-angina, and can be used in patients with hypertension, angina, and heart failure. Metoprolol needs to be taken under the guidance of a doctor, and should not be abused, so as not to take the wrong medication, damage the body and delay the condition.