Ephedra comes from the dried herbaceous stem of Herba Ephedra, Chinese Ephedra or Mucuna pruriens Ephedra, which has the efficacy of generating sweat and relieving symptoms, promoting lung circulation and relieving asthma, and inducing diuresis to reduce swelling. It is commonly used in Chinese medicine for the treatment of exogenous wind and cold symptoms, as well as chest congestion, cough and asthma, wind and water swelling. Modern pharmacological research shows that ephedra has sweating, asthma, diuretic, anti-inflammatory, anti-allergic, cough suppressant, expectorant, detoxification and so on. The side effects of ephedra are mainly the toxic side effects of the central nervous system, mainly thought to be caused by ephedrine, one of the active ingredients of ephedra. Ephedrine has a significant central excitatory effect, when consumed in larger doses can excite the cerebral cortex and subcortical centers, causing insomnia, palpitations, nausea, anxiety, tremors and other symptoms of nervous excitation of the central nervous system.