Beta blockers are used to treat irregular heart rhythms, chest pain, heart attack, hypertension, migraine headaches, social phobias, tremors, and glaucoma. Common side effects of beta blockers are nausea, vomiting, abdominal cramps, diarrhea, and weight gain if you are taking medicine for diabetes (type 1 and type 2). Examples of generic and brand names available for beta blockers in the U.S. Metoprolol is used to treat angina (chest pain) and hypertension (high blood pressure). Learn about side effects, interactions and indications. Beta blockers, also spelled β-blockers and also sometimes known as β-adrenergic receptor antagonists, are a class of medications predominantly used to manage abnormal heart rhythms (arrhythmia) and to protect the heart from a second heart attack after the first one (secondary prevention). [1] They are also used widely to treat high blood pressure, though they are no longer the first choice. Compare beta-adrenergic blocking agents (beta blockers). View important safety information, ratings, user reviews, popularity and more. Beta blockers are medicines that lower blood pressure. They also may be called beta-adrenergic blocking agents. These medicines block the effects of the hormone epinephrine, also known as adrenaline. Beta blockers cause the heart to beat more slowly and with less force. This lowers blood pressure. Find out more about beta blocker medicines, including the different types, possible side effects, and who can and cannot take them. In short, beta-blockers slow down your heart rate and relax smooth muscle tissue in your blood vessels. Learn other ways they affect your body. Beta blocker medicines help treat heart conditions, like irregular heart rhythms, angina and heart failure. Learn how they work, what they do and potential side effects. Beta-blockers are often prescribed for irregular heartbeats, high blood pressure, and after heart attacks. Learn more about how they work. Beta-blockers (also called beta-adrenergic blockers) are drugs that are used to lower blood pressure (among other things). They do this by blocking the effects of the hormones adrenaline and. Beta blockers are medications used to lower blood pressure and manage heart rhythms. See a list of the different types of beta blocker such as metoprolol, atenolol, and more. Beta blockers are a class of drug used for treating abnormal heart rhythms, angina, high blood pressure, migraine, anxiety, and more. Side effects of beta blockers include diarrhea, stomach cramps, nausea and vomiting, rash, blurred vision, muscle cramps, and fatigue, although they are generally well tolerated.