Types of medicine
What Is a Beta-Blocker? Uses and Label Warnings
Beta-blocker · say it: BAY-tuh BLOK-erAlso written: beta blocker, beta-adrenergic blocking agent, beta-blockers
Short answer
A beta-blocker is a medicine that slows the heart and lowers its workload, used for blood pressure, angina, heart failure and some rhythm problems.
What it means
Beta-blockers block the effect of adrenaline on beta receptors, mainly in the heart and blood vessels. This slows the heart rate and makes the heart beat with less force. They are used for high blood pressure, angina, heart failure, after a heart attack, for some heart rhythm problems, and sometimes for migraine, tremor or the physical signs of anxiety. Names usually end in '-olol', such as atenolol or propranolol.
Labels for beta-blockers warn not to stop them suddenly, because this can make angina or heart problems worse, so stopping is usually done gradually with a doctor's advice. They also warn about slow heart rate, dizziness and tiredness, and that some beta-blockers can tighten the airways in people with asthma. In people with diabetes, they can hide some warning signs of low blood sugar, such as a racing heart.
Beta-blockers are one of several groups of blood pressure medicines; others include ACE inhibitors, calcium channel blockers and diuretics. They are different from alpha-blockers, which work on a different receptor.
Where you may see it
- Boxed or bold warnings: 'Do not stop suddenly'
- Asthma and diabetes precautions in leaflets
- Medicine lists in cardiology letters and discharge summaries
📄 How it looks on a report
Do not abruptly discontinue. Severe exacerbation of angina and the occurrence of myocardial infarction have been reported after abrupt discontinuation.
🙅 What it does not mean
- A slower pulse on a beta-blocker is expected and is not always a problem; your doctor will say what is too slow for you.
- It is not only a blood pressure medicine; it has several heart and non-heart uses.
- It does not mean you cannot exercise, though your heart rate may not rise as much.
🎯 Check yourself
Which of these is the right meaning of “Beta-blocker”?
🗒️ Questions to ask your doctor
💊 Medicines whose labels mention “Beta-blocker”
Plain-English explanations of each medicine, from its official FDA label.
- Albuterol
A bronchodilator (a medicine that opens the airways) of the beta-2 adrenergic type. The FDA class is not listed, so this description comes from the label's own wording.
- Atenolol
a beta-blocker (beta-adrenergic blocker). The label describes it as a beta 1-selective, or cardioselective, blocking agent.
- Bisoprolol Fumarate
a beta-blocker, which the label describes as a synthetic, beta 1-selective (cardioselective) adrenoceptor blocking agent
- Bupropion Hydrochloride
an aminoketone antidepressant, a type of medicine used to treat depression
- Carvedilol
A beta-blocker. The FDA lists it as both an alpha-adrenergic blocker and a beta-adrenergic blocker.
- Glipizide
a blood-sugar-lowering medicine of the sulfonylurea type
- Insulin Glargine
an insulin analog, a long-acting man-made insulin used to treat diabetes
- Metoprolol Tartrate
A beta blocker. The label describes it as a selective beta-1 adrenergic receptor blocking agent, which means it mainly blocks beta-1 receptors, found largely in the heart.
- Nifedipine
a calcium channel blocker of the dihydropyridine type
🔗 Read more from trusted sources
- “Beta-blocker” on MedlinePlus ↗
US National Library of Medicine
- NCI Dictionary definition ↗
US National Cancer Institute: “beta blocker”
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