Salbutamol, also known as albuterol and sold under the brand name Ventolin among others, is a medication that opens up the medium and large airways in the lungs.[6] It is a short-acting β2 adrenergic receptor agonist that causes relaxation of airway smooth muscle.[6] It is used to treat asthma, including asthma attacks and exercise-induced bronchoconstriction, as well as chronic obstructive pulmonary disease (COPD).[6] It may also be used to treat high blood potassium levels.[7] Salbutamol is usually used with an inhaler or nebulizer, but it is also available in a pill, liquid, and intravenous solution.[6][8]