<unk>  is approved for use in some countries as a bronchodilator for asthma.<unk>  is a β2 agonist with some structural and pharmacological similarities to epinephrine and salbutamol, but its effects are more potent and longer-lasting as a stimulant and thermogenic drug. It is commonly used for smooth muscle-relaxant properties as a bronchodilator and tocolytic. It is classified by the World Anti-Doping Agency as an anabolic agent, not as a β2 agonist.<unk>  is prescribed for treatment of respiratory diseases for horses, and as an obstetrical aid in cattle. It is illegal in some countries to use in livestock used for food.
Clenbuterol
Salbutamol
Levosalbutamol
Formoterol
Arformoterol
Bambuterol
Zafirlukast
Pranlukast