Beta agonists

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Beta Agonists

Beta agonists (pronunciation: /ˈbiːtə ˈæɡənɪsts/) are a class of medication that relax the smooth muscles of the airways, which widen the airways and result in easier breathing. They are primarily used in the treatment of asthma and chronic obstructive pulmonary disease (COPD).

Etymology

The term "beta agonist" is derived from the Greek word "β" (beta), referring to the second letter of the Greek alphabet, and the English word "agonist", which is derived from the Late Latin word "agonista", meaning contender. In the context of pharmacology, an agonist is a substance that initiates a physiological response when combined with a receptor.

Types of Beta Agonists

Beta agonists can be classified into two main types: short-acting beta agonists (SABAs) and long-acting beta agonists (LABAs).

Side Effects

Like all medications, beta agonists can cause side effects. Common side effects include tachycardia (fast heart rate), tremor, and anxiety. Less common but more serious side effects include arrhythmia (irregular heart rhythm) and hypokalemia (low potassium levels).

Related Terms

  • Bronchodilator: A type of medication that relaxes and opens the airways in the lungs.
  • Receptor: A protein molecule that receives chemical signals from outside a cell.
  • Pharmacology: The study of drugs and their effects on the body.

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