Medical Definition of metaproterenol
: a bronchodilator that is administered in the form of its sulfate (C11H17NO3)2·H2SO4 in the treatment of bronchial asthma and reversible bronchospasm associated with bronchitis and emphysema—called also orciprenaline ◆Metaproterenol acts as an agonist, binding to beta-receptors that mediate the relaxation of the bronchial muscles.
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