Beta blockers
Beta blockers
Beta blockers, also known as beta-adrenergic blocking agents, are a class of drugs that are predominantly used to manage abnormal heart rhythms, and to protect the heart from a second heart attack (myocardial infarction) after a first heart attack (secondary prevention). They are also widely used to treat high blood pressure (Hypertension), although they are no longer the first choice for initial treatment of high blood pressure.
Pronunciation
Beta blockers: /ˈbiːtə ˈblɒkərs/
Etymology
The term "beta blocker" is derived from the classification of adrenoceptors (adrenergic receptors) that these medications block, specifically the beta receptors.
Usage
Beta blockers work by blocking the effects of the hormone epinephrine, also known as adrenaline. They cause the heart to beat more slowly and with less force, which lowers blood pressure. Beta blockers also help blood vessels open up to improve blood flow.
Types of Beta Blockers
There are several types of beta blockers, but they all work by affecting the beta receptors in the heart. Some of the most commonly prescribed include:
Side Effects
Like all medications, beta blockers can have side effects. Some of the most common side effects include:
- Fatigue
- Cold hands or feet
- Weight gain
- Shortness of breath
Related Terms
External links
- Medical encyclopedia article on Beta blockers
- Wikipedia's article - Beta blockers
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