In conditions where there is narrowing of the airways, such as asthma or chronic obstructive pulmonary disease (COPD, eg emphysema and chronic bronchitis), it is difficult for air to get in and out of the lungs. By opening the airways, salbutamol makes it easier to breathe.
Salbutamol is most commonly taken using an inhaler device. Inhaling the medicine allows it to act directly in the lungs where it is needed most. It also reduces the potential for side effects occurring in other parts of the body, as the amount absorbed into the blood through the lungs is lower than if it is taken by mouth.
Salbutamol when used as an inhaler is known as a reliever. This is because it works very quickly to relieve asthma attacks, wheezing, chest tightness or shortness of breath. Salbutamol inhalers can also be used to open the airways shortly before exercising to prevent wheezing.
