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Short-Acting Beta2 Agonists Overview

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Questions and Answers

What is the primary therapeutic class of bronchodilators?

Short Acting Beta2 Agonists (correct)

Anticholinergics

Long Acting Beta2 Agonists

Leukotriene Modifiers

What is a common adverse reaction associated with bronchodilators?

Palpitations (correct)

Weight gain

Increased appetite

Drowsiness

Which statement about the mechanism of action of bronchodilators is true?

They block beta2 receptors to prevent bronchoconstriction.

They relax bronchial smooth muscle. (correct)

They inhibit histamine release in the lungs.

They increase mucus production in the airways.

How long do the effects of bronchodilators typically last?

2-6 hours Signup and view all the answers

What is the recommended dosing frequency for Salbutamol, commonly used in emergencies?

1-2 puffs every 4-6 hours Signup and view all the answers

Which of the following is NOT a common auxiliary label for bronchodilators?

Take With Food Signup and view all the answers

Study Notes

Short-Acting Beta2 Agonists (SABAs)

Therapeutic Class: Short-acting beta2 (β2) adrenergic agonists (SABAs)
Common Name: Bronchodilators
Commonly Used To Treat: Asthma
Mechanism of Action:
- Bind to beta2 (β2) receptors
- Relax bronchial smooth muscle
- Reverse bronchospasm and open airways
Notes:
- Rapid onset of action (works quickly)
- Short duration of action (effects last 2-6 hours)
- "Rescue" inhalers - used when an individual is having an asthma attack to open airways
Common Adverse Reactions:
- Palpitations, tachycardia, nervousness
Common Auxiliary Labels:
- Shake well before use (for most Metered-Dose Inhalers)
- Do not exceed recommended dose (on all SABAs)
Brand Names: Airomir, Ventolin, Bricanyl
Generic Names:
- Salbutamol
- Terbutaline
Available Doses & Forms:
- Metered-Dose Inhaler (MDI) - 100mcg per dose (1 dose = 1 puff or inhalation)
- Commonly dosed: 1-2 puffs Q4-6H
- Nebules
- Turbuhaler - 0.5mg per dose

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Description

This quiz covers the essential aspects of short-acting beta2 agonists (SABAs), including their therapeutic class, mechanism of action, common uses in treating asthma, and potential adverse reactions. Test your knowledge on brand and generic names, dosing, and the important auxiliary labels to ensure proper use of these bronchodilators.