Which of the following drugs is a Long-Acting Beta-2 Agonist (LABA) that, unlike Salmeterol, has a rapid onset of action?
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Correct answer: Formoterol
Formoterol is unique because it combines a long duration of action (12 hours) with a rapid onset (1-3 minutes). This allows it to be used in 'MART' (Maintenance and Reliever Therapy) protocols in certain guidelines.
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