The correct usage of Cymbicort DuPont, i.e. budesonide formoterol powder inhalation powder aerosol, is initialization, loading, exhalation, inhalation, exhalation after breath-holding, screwing on the cap and rinsing the mouth. 1. Initialization: It is necessary to initialize Cymbicort DuPont before using it for the first time. Unscrew and remove the cap of the bottle so that the red screw handle is underneath. Hold the bottle vertically, hold the bottom red and center parts in your hand, turn it to the bottom in either direction, and then turn it to the bottom in the opposite direction, and do this 2 times. 2. Filling: Repeat the initialization operation 1 time. 3. Exhale: Exhale out of your mouth into the open space. 4. Inhale: When finished, gently place the suction nozzle between the upper and lower teeth, and begin to inhale forcefully and deeply after wrapping the lips completely around the suction nozzle. 5. Hold your breath and exhale: Remove the mouthpiece at the end of the inhalation, hold your breath for about 5 seconds, and then start exhaling again. 6. Tighten the cap and gargle: After inhaling the medication, tighten the cap and gargle with water to reduce the likelihood of developing fungal oropharyngitis. Budesonide formoterol inhalation powder aerosol can be used as a routine therapeutic agent for asthmatics who require a combination of inhaled glucocorticosteroids and long-acting beta2 agonists, and is contraindicated in patients with allergic reactions to budesonide, formoterol, or inhaled lactose (which contains a small amount of cow’s milk protein). The most common adverse reactions are tremor and palpitations, but systemic adverse reactions such as Cushing’s syndrome, adrenal suppression, decreased bone mineral density, cataracts and glaucoma may also occur. It should be noted that drug deposition can lead to oropharyngeal candida infections, so you must rinse your mouth after use. The drug needs to be used under medical supervision.