A patient with asthma uses a salbutamol (albuterol) inhaler. This drug acts primarily as a:

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ABeta-2 adrenergic agonist causing bronchodilation
BAlpha-1 adrenergic agonist causing vasoconstriction
CCorticosteroid reducing airway inflammation
DAnticholinergic agent reducing secretions

✓ Correct answer: A. Beta-2 adrenergic agonist causing bronchodilation Salbutamol is a selective beta-2 adrenergic agonist that relaxes bronchial smooth muscle, causing rapid bronchodilation and relief of acute bronchospasm.

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A patient with asthma uses a salbutamol (albuterol) inhaler. This drug acts primarily as a:

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