Oral Inhalation Beta2-adrenergic agonist (bronchodilator) used to treat a variety of airway diseases that require bronchodilation. This product relaxes bronchial smooth muscle and may inhibit the release of inflammatory mediators, especially from mast cells. This product is also known by the following brand names: Proventil, Ventolin, Salbuterol (outside US) and the Torpex equine inhaler. Please note: This product is a concentrate and must be diluted before use.