|AHFS/Drugs.com||Consumer Drug Information|
|CompTox Dashboard (EPA)|
|Chemical and physical data|
|Molar mass||240.30 g/mol|
300.3 g/mol (acetate) g·mol−1
|3D model (JSmol)|
|(what is this?)|
Pirbuterol (trade name Maxair) is a short-acting β2 adrenoreceptor agonist with bronchodilating action used in the treatment of asthma, available (as pirbuterol acetate) as a breath-activated metered-dose inhaler.
It was patented in 1971 and came into medical use in 1983.
Pirbuterol is used in asthma for reversal of acute bronchospasm, and also as a maintenance medication to prevent future attacks. It should be used in patients 12 years of age and older with or without concurrent theophylline and/or inhaled corticosteroid.
After inhalation of doses up to 800 μg (twice the maximum recommended dose) systemic blood levels of pirbuterol are below the limit of assay sensitivity (2–5 ng/ml). A mean of 51% of the dose is recovered in urine as pirbuterol plus its sulfate conjugate following administration by aerosol. Pirbuterol is not metabolized by catechol-O-methyltransferase. The plasma half-life measured after oral administration is about two hours.
|This drug article relating to the respiratory system is a stub. You can help Wikipedia by expanding it.|