Fasting can do nebulization, nebulization is the use of specialized nebulizing agent type of drugs, currently commonly used is Cobit, Pramipexole, salbutamol, these drugs itself does not have a bad smell, not too much chemical taste, so generally does not cause gastrointestinal discomfort. If the concentration is too large when nebulizing, it may cause choking, dry heaving or brief respiratory difficulties, just need to adjust the smoke to a smaller amount or pause, usually can be relieved. Do not rush to drink and eat after nebulization on an empty stomach, wait for 20 minutes after nebulization and then eat, in the throat, bronchial tubes, alveoli can reach a more ideal drug concentration.