Levosalbutamol belongs to the class of bronchodilators that works by relaxing the muscles and widening the airways of the lungs. It thus makes breathing easier.
Budesonide belongs to the class of corticosteroids that works by acting inside the cells of the nasal lining and stops the release of certain chemicals in the body that cause inflammatory reactions. It thus provides relief from sneezing, runny or blocked nose and sinus discomfort.