A<unk>  is a substance that dilates the bronchi and bronchioles, increasing airflow and relieving bronchial obstruction.<unk> s may be endogenous (originating naturally within the body), or they may be medication administered for the treatment of breathing difficulties. Bronchial asthma is the most common application of these drugs. They are also intended to help improve the breathing capacity of patients with emphysema, pneumonia and bronchitis.
Pharmaceutically<unk> s belong to
β2 mimetics as they act on β2 receptors present in the bronchial smooth muscle and bronchial mucous membranes.<unk> s, particularly non-prescription ones, are often misused as stimulants. A common side effect of these medications is desensitization, which may produce refractory bronchospasm.<unk> s are either short-acting or long-acting. Short-acting medications (also known as SABA) provide quick or rescue relief from acute bronchoconstriction. Long-acting<unk> s (known as LABA) help to control and prevent symptoms. The three types of prescription<unk>  drugs are β2-agonists (short- and long-acting), anticholinergics (short-acting), and theophylline (long-acting).
Bronchodilator
Enuresis
Diuresis
Steroid
Diuretic
Immunostimulator
Antihypertensive
Antiarrhythmic agent