Changdi refers to dust mite drops, this drug can be used for the desensitization treatment of allergic rhinitis caused by dust mites, but this disease can not be completely cured at present, and the specific efficacy of the drug after use varies from person to person. Dust mite drops are suitable for desensitization of allergic rhinitis caused by dust mite allergy, but the therapeutic effect of the use of the drug may vary depending on individual factors such as individual constitution, timing and compliance of treatment, and other interventions, etc., and allergic rhinitis can not be completely cured at present, so it is not appropriate to say that the term “complete desensitization” is not appropriate. It should also be noted that dust mite drops are contraindicated in the presence of asthma exacerbations, febrile infections or inflammation of the respiratory tract, autoimmune disorders, etc. Adverse reactions such as skin rashes, runny nose, etc., may also occur during the course of the drug. Therefore, people with allergic rhinitis who have the need to use this drug must be regulated under the guidance of a doctor in order to strive for a good prognosis. Do not blindly use the drug or increase or decrease the dosage on your own to avoid adverse consequences.