Salbutamol is used to relieve breathlessness in patients with asthma or chronic obstructive pulmonary disease (COPD). Asthma and COPD affects the lungs which makes it harder for the person to breathe as the disease gets worse over time. Salbutamol helps open up the airway quickly, making it easier for one to breathe. Salbutamol helps to relieve breathlessness quickly and is normally referred to as a 'reliever' inhaler. It does not prevent attacks from happening.