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Oral Beta-2 Agonists
Beta-2 agonists work in a manner similar to adrenaline, opening airways and easing breathing. They work by binding with, and thus stimulating, beta-2 receptors that line the cell walls of the lungs and the bronchioles. The effect of the stimulation is to
relax smooth muscles and widen the airways.
Possible side effects to the Beta-2 agonists include shakiness, rapid heartbeat,
and upset stomach.
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Beta-2 Agonists
relax smooth muscles to widen air passages.
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Oral beta2-agonists works in a similar fashion to inhaled beta2-agonists, but they may take longer to work than the inhaled formulation. Oral beta-agonists must be absorbed in the digestive tract and travel through the circulatory system before they begin working in the lungs, whereas the inhaled formulations go straight to the lungs. Drugs in the class
Albuterol Oral Tablets ()
Metaproterenol Oral (Alupent, Metaproterenol)
Terbutaline Tablets ()
Albuterol Oral Syrup () | 
