Wiktionary
pirbuterol
n. A bronchodilator used in the treatment of asthma.
Wikipedia
Pirbuterol
Pirbuterol (trade name Maxair) is a short-acting β adrenoreceptor agonist with bronchodilating action used in the treatment of asthma, available (as pirbuterol acetate) as a breath-activated metered-dose inhaler (Maxair Autohaler).