What is metaproterenol?

(β2 non selective) (Β2> β1) chemically similar to isoproterenol, is not a catecholamine, and it is resistant to methylation by COMT It can be administered orally or by inhalation The drug acts primarily at β2 receptors, producing little effect on the heart Metaproterenol produces dilation of the bronchioles and improves air-way function The drug is useful as a bronchodilator in the treatment of asthma and to reverse bronchospasm Little cardiac stimulation Alupent® (metaproterenol sulfate USP) inhalation aerosol is indicated as a bronchodilator to treat asthma