<unk>  is typically used to treat bronchospasm (due to any cause—allergic asthma or exercise-induced), as well as chronic obstructive pulmonary disease. It is also one of the most common medicines used in rescue inhalers (short-term bronchodilators to alleviate asthma attacks). As a β2 agonist,<unk>  also has use in obstetrics. Intravenous<unk>  can be used as a tocolytic to relax the uterine smooth muscle to delay premature labor. While preferred over agents such as atosiban and ritodrine, its role has largely been replaced by the calcium channel blocker nifedipine, which is more effective and better tolerated.<unk>  has been used to treat acute hyperkalemia, as it stimulates potassium flow into cells, thus lowering the potassium in the blood.
Salbutamol
Levosalbutamol
Formoterol
Arformoterol
Methacholine
Seratrodast
Bambuterol
Fluticasone