Bronchodilators · Pharmacology

Formoterol differs from Salmeterol because Formoterol has:

  1. A much shorter half-life
  2. A faster onset of action
  3. No effect on cAMP
  4. Significant alpha-1 activity
Show answer and explanation

Correct answer: A faster onset of action

While both are LABAs, Formoterol has a rapid onset of action (1-3 minutes) similar to Albuterol, whereas Salmeterol takes 15-30 minutes. This allows Formoterol to be used for both maintenance and symptom relief in specific combination therapies.

Difficulty: Medium Question 19 of 20

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