The blue asthma inhaler typically contains a medication called albuterol (salbutamol), which belongs to a class of drugs known as short-acting beta-agonists. It's commonly used to quickly relieve asthma symptoms like wheezing, shortness of breath, and chest tightness by relaxing the muscles in the airways and allowing easier breathing. This type of inhaler is often referred to as a "rescue inhaler" because it provides rapid relief during asthma attacks or flare-ups. Individuals with asthma need to carry their blue inhaler with them at all times for emergency use.