There are indeed quite a variety of drugs for asthma treatment, but there are two main types: ① inhaled hormones; ② inhaled bronchodilators. But its inhalation device is mainly two types, one is aerosol and the other is dry powder aerosol. It is a relatively early primitive device. The cost of this aerosol is relatively low, but its use requires a high degree of coordination between the patient’s hand movements, pressing movements and inhalation movements during inhalation, and if the coordination is not good, the effect of this aerosol will be limited. Dry powder is a further modification of this device. On this drug into a dry powder device, the patient does not need the cooperation of the hand when inhaling, can be in accordance with their own subjective will, as long as he showed the inhalation action, the drug can enter the patient’s airway to take effect. Although it is more convenient to inhale dry powder, my personal experience is that the patient must find a doctor to teach him or her how to use the inhalation device when prescribed by the doctor. Because I think it is difficult to learn this method just by reading the manual, only after the hands-on teaching, the patient can use the drug correctly, otherwise you will think that the drug is ineffective, it is actually not ineffective, but not the correct inhalation. You have a special nurse to teach first time patients how to inhale this drug, like we have in the respiratory clinic of China-Japan Hospital.