Due to the increase in allergic coughs and asthma, some parents have opted for home nebulized medication treatment under the guidance of a professional physician. The principle of nebulized inhalation is the sudden decompression of gas through a narrow mouth, and the negative pressure generated locally sucks out the medicine and forms mist particles. The size of the drug mist particles is related to the pressure and flow rate of the airflow, and the size of the jet nebulized mist particles is 3 to 5 um, which can be better deposited in the small airways to play a therapeutic role. Family nebulization should pay attention to matters: a. The choice of home nebulizer 1. asthma generally choose jet nebulization device (or air compression pump); 2. nebulized particles fine and unit time the amount of fog release and air pressure, flow related. Less than 5um of the proportion of nebulized particles to more than 50%, the greater this proportion, the better the performance of the nebulizer, especially children on the nebulized particles require higher air pressure, flow rate is best to regulate; 3. drug residue to be less than 0.5ml, the lower the drug residue indicates that this nebulizer on the high utilization of the drug solution; 4. low working noise, long service life, good portability, good safety and other performance on Do not say. Second, the drug nebulized inhalation therapy drugs can be higher concentration of rapid, direct action on the lungs, high local drug concentration, rapid and reliable efficacy. But not all drugs can be used for “nebulization”, the types of drugs that can be used for nebulized inhalation are: short-acting β2-agonists (SABA), such as salbutamol solution, terbutaline nebulized suspension; anticholinergic drugs: ipratropium bromide nebulized solution; compound ipratropium bromide (ipratropium bromide and salbutamol). Inhaled glucocorticoids (ICS): budesonide, beclomethasone propionate suspension, etc. For reasons of efficacy and safety, other drugs are not recommended for nebulized inhalation. Drug dosage: Since children metabolize drugs faster than adults and younger children metabolize drugs faster than older children, the amount of drugs inhaled into the lungs is directly related to age, the younger the age, the less the amount of drugs inhaled into the lungs. Therefore, it is generally not necessary to calculate the dose of inhaled therapeutic drugs based on body weight. When nebulized inhalation usually salbutamol solution (2.5~5mg), budesonide suspension (0.5~1mg), ipratropium bromide (250~500ug), diluted with 2ml of saline, can be used in combination. Third, nebulized inhalation requires precautions 1, pay attention to thoroughly wash your hands before preparing the drug or taking the drug; 2, it is best to take a relaxed upright sitting position, try to calm deep diffuse breathing, for young patients it is best to operate in the awake state to see, try not to nebulize when the child is crying. If the child coughs frequently, the inhalation should be suspended and start again after the breathing is stable; 3, the nebulized inhalation time depends on the volume of the liquid, about 10 minutes to 15 minutes each time; 4, try not to eat before the nebulized inhalation half an hour, to avoid the nebulized inhalation process of aerosol irritation of the airway, causing vomiting. Also do not let the nebulizer solution into the eyes, otherwise it will cause eye discomfort, and it is best to close the eyes during the nebulization process; 5. After each inhalation, you can rinse your mouth with saline or warm boiled water, and wash your face with water to prevent side effects caused by residual drugs. After the end of nebulization, the nebulization tank and accessories should be cleaned in time, can be washed with water, dry before use; 6, infants and children with a mask to administer drugs, the mask should be fastened to the mouth and nose, more than 5 years old, the use of oral apparatus is better; 7, nebulization mask is a disposable medical supplies, the use of 2- should be replaced. Available 84 disinfectant (0.5%) soak 15-30 minutes, water rinse; 8, no effect, please seek medical attention.