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Overview and Mechanism of Action Terbutaline sulfate is a short-acting selective beta-2 agonist (SABA) utilized primarily for the treatment and prevention of bronchospasms associated with asthma and COPD. It functions by stimulating beta-2 adrenergic receptors, which are densely located on bronchiolar smooth muscle. This stimulation activates the enzyme adenyl cyclase, leading to an increase in cyclic adenosine monophosphate (cAMP). The resulting elevation in cAMP causes vasodilation and significant relaxation of bronchial smooth muscle, thereby increasing bronchial airflow.

The Boxed Warning on Tocolysis The most critical clinical safety inf ...