albuterol

Salbutamol, also known as albuterol and marketed as Ventolin among other brand names,[3] is a medication that opens up the medium and large airways in the lungs.[6] It is used to treat asthma, including asthma attacks, exercise-induced bronchoconstriction, and 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] Onset of action of the inhaled version is typically within 15 minutes and lasts for two to six hours https://en.wikipedia.org/wiki/Salbutamol