Beta-blockers are divided into selective beta-blockers, non-selective beta-blockers, and the third category is alpha and beta-blockers. The representative drugs of the three are propranolol, bisoprolol and carvedilol, respectively. Common beta-blockers: First, atenolol, which is a cardioselective beta-blocker, mainly targeting the myocardium of the heart, with no significant selectivity for blood vessels. Second, cardioselective beta-blockers, a common drug is betaxolol, also called metoprolol. Third, sotalol hydrochloride, with beta-blocker action, has anti-arrhythmic characteristics. Fourthly, Takayasu, a more common beta-blocker, which is a non-selective representative and can be used for blood pressure control and arrhythmia treatment. Fifth, carvedilol, α and β receptor blocker, β receptor blocking strength is greater, more than thirty times that of labetalol, but also three times that of propranolol, can block the prominent posterior membrane of α receptors, dilate blood vessels, reduce peripheral resistance, and can block the secretion of β receptors.