Budesonide Formoterol Inhaler. It works by relaxing the muscles around the airways so that they open up and you can breathe more easily. Budesonide belongs to a class of drugs known as corticosteroids.
Continue to breathe in (inhale) and then hold your breath for about 10 seconds, or for as long as it is comfortable. And thumb underneath the mouthpiece of the inhaler. Keep your inhaler upright and remove it from your mouth.