This medication is used for the treatment of asthma, chronic bronchitis, and other breathing disorders. It works by relaxing the muscles in the walls of the small airways in the lungs. This helps to open up the airways and make breathing easier. Ventolin medicine contains the active ingredient salbutamol, which is a type of medicine known as a short-acting beta 2 agonist. It works by acting on receptors in the lungs called beta 2 receptors. Stimulation of these receptors causes the muscles in the airways to relax, allowing the airways to open.