AEMCA Practice Exam

What class of medication is salbutamol?

1. A short term beta-2 receptor agonist

2. A long-acting sedative

3. A COX-2 inhibitor

4. An opioid receptor agonist

The correct answer is: A short term beta-2 receptor agonist

Salbutamol is classified as a short-acting beta-2 receptor agonist. It primarily works by targeting beta-2 adrenergic receptors in the smooth muscles of the airways, leading to bronchodilation, which provides relief from bronchospasm often associated with conditions such as asthma and chronic obstructive pulmonary disease (COPD). This mechanism allows for quick and effective alleviation of symptoms, making it a preferred choice in emergency situations where rapid respiratory relief is needed. The effectiveness of salbutamol in dilating the airways distinguishes it from other medication classes. Long-acting sedatives and COX-2 inhibitors do not have any direct role in treating asthma or other respiratory issues, and they operate through entirely different mechanisms. Opioid receptor agonists, while they target pain management, do not affect the respiratory tract in the way salbutamol does. Thus, the classification of salbutamol as a short-acting beta-2 receptor agonist appropriately highlights its primary use and mode of action in respiratory therapies.