A blue asthma inhaler, commonly known as a “reliever” inhaler, typically contains a medication called a short-acting beta-agonist (SABA) such as salbutamol. This medication works by quickly relaxing the muscles around the airways, making it easier to breathe during an asthma attack or when experiencing sudden asthma symptoms. The inhaler should be used as directed by a healthcare provider. Typically, patients are advised to take one or two puffs when experiencing symptoms. It is important to shake the inhaler before use and to inhale the medication deeply into the lungs.