Short-acting bronchodilators are medications used to relieve symptoms of respiratory conditions like asthma and chronic obstructive pulmonary disease (COPD). They work by relaxing the muscles around the airways, making it easier to breathe. These medications typically provide quick relief, often within minutes, and are usually taken through an inhaler. These bronchodilators are often referred to as "rescue" inhalers because they are used during asthma attacks or sudden breathing difficulties. Common examples include albuterol and levalbuterol. They are generally effective for a few hours, making them essential for managing acute symptoms.