A drug may be classified by the chemical type of the active ingredient or by the way it is used to treat a particular condition. Each drug can be classified into one or more drug classes.
Adrenergic bronchodilators (specifically beta2-adrenoreceptor agonists) dilate the bronchi by a direct action on the beta2-adrenoreceptors on the bronchial smooth muscle and relax the muscle.
There are two categories of beta2-adrenoreceptor agonists used in asthma. The short acting adrenergic bronchodilators are used on an as needed basis to control symptoms of asthma. The longer acting bronchodilators are used regularly, twice daily, as adjunct therapy in patients whose asthma is poorly controlled by inhaled corticosteroids.
Subscribe to receive email notifications whenever new articles are published.
Drugs.com provides accurate and independent information on more than 24,000 prescription drugs, over-the-counter medicines and natural products. This material is provided for educational purposes only and is not intended for medical advice, diagnosis or treatment. Data sources include Micromedex® (updated Sep 28th, 2016), Cerner Multum™ (updated Oct 2nd, 2016), Wolters Kluwer™ (updated Oct 1st, 2016) and others. To view content sources and attributions, please refer to our editorial policy.