It is generally recommended to keep the leftover medication from nebulization in the refrigerator. If the medication is not used up after the nebulization is performed, it can be kept in the refrigerator for about 12 hours and needs to be used up in a timely manner within the 12-hour period to avoid the medication from becoming infected with bacteria. If the medication is not used for more than 12 hours, it is recommended that the nebulized medication be thrown away and a new medication be purchased from the pharmacy. This is because prolonged refrigeration will allow bacteria to grow and may aggravate the condition when used again. In addition, it should be noted that the nebulizing apparatus used by the patient should also be disinfected and sterilized. Usually patients should avoid going to places with more crowds or dust, which is not conducive to the recovery of respiratory airways. Keep the air at home fresh, dry and the humidity of the room up to standard, ventilate often, and try not to let the remaining drugs of materialization exist in the air, so as not to volatilize or breed bacteria.