A blue asthma inhaler typically refers to a “reliever” inhaler used to quickly alleviate asthma symptoms. These inhalers often contain a medication called salbutamol (or albuterol in the U.S.), which is a short-acting bronchodilator. It works by relaxing the muscles in the airways, making it easier to breathe during an asthma attack or when experiencing shortness of breath.

People with asthma use the blue inhaler during an asthma attack or when they feel symptoms like wheezing, shortness of breath, or chest tightness. It provides quick relief but does not treat the underlying inflammation of the airways, which is why it’s often used in conjunction with a “preventer” inhaler that contains corticosteroids.