A bronchodilator is a type of medication that helps open the airways in the lungs. It is commonly used to treat conditions like asthma and chronic obstructive pulmonary disease (COPD). By relaxing the muscles around the airways, bronchodilators make it easier for air to flow in and out of the lungs, improving breathing. Bronchodilators can be delivered through inhalers or nebulizers, allowing for quick relief during breathing difficulties. There are two main types: short-acting bronchodilators, which provide quick relief, and long-acting bronchodilators, which are used for ongoing control of symptoms.