albuterol sulfate

Definition / meaning of albuterol sulfate

The sulfate salt of the short-acting sympathomimetic agent albuterol, a 1:1 racemic mixture of (R)-albuterol and (S)-albuterol with bronchodilator activity. Albuterol stimulates beta2-adrenergic receptors in the lungs, thereby activating the enzyme adenylate cyclase that catalyzes the conversion of ATP to cyclic-3′,5′-adenosine monophosphate (cAMP). Increased cAMP concentrations relax bronchial smooth muscle, relieve bronchospasms, and reduce inflammatory cell mediator release, especially from mast cells. To a lesser extent albuterol stimulates beta1-adrenergic receptors, thereby increasing the force and rate of myocardial contraction.

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Source(s):

The Web site of the National Cancer Institute (http://www.cancer.gov/)

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