Bronchodilators 

Bronchodilators help relieve asthma, COPD and other lung condition symptoms by relaxing the muscles around your airways and helping clear mucus from your lungs. There are long-acting forms and short-acting forms. You may take them as an inhaler, nebulizer solution or tablet.

Short-acting bronchodilators are inhalers that you use during an asthma attack or an exacerbation of COPD when you’re having severe troubling breathing. They’re often called rescue inhalers. They help you breathe again quickly but the effects only last a few hours, so they’re not for managing your condition long-term.