The efficacy of Di Long is to clear away heat, calm down fright, promote circulation, calm asthma and diuretic. The clinical application of Di Long can be used to assist in the treatment of some diseases, such as poor urinary discharge due to urinary tract infection, or inability to urinate due to prostatitis. Di Long can also be used for the treatment of lung diseases, such as swelling of the throat with phlegm, asthma, cough, coughing and phlegm caused by prolonged lung diseases, and when lung heat is more abundant. It is mainly used to treat central diseases, such as mania caused by prolonged high fever, epilepsy and convulsions. There are certain contraindications to the application of Dilong, namely, the application of Dilong to people who are particularly weak may lead to aggravation of the disease, such as those who usually have little qi and are lazy in speech, and those who have weak spleen and stomach. Severe blood deficiency and asthma will be significantly aggravated by the use of dilong, and acute inflammatory infections are also not suitable for the application of dilong.