Which Beta-2 agonist is available in an oral form, though it is rarely used due to increased systemic side effects?
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Correct answer: Metaproterenol
Metaproterenol is available as an oral syrup or tablet in addition to inhaled forms, but the oral route gives much higher systemic exposure and more tachycardia and tremor. Salmeterol, indacaterol and arformoterol are marketed for inhalation only.
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