Ephedra is pungent, slightly bitter and warm. Enter lung meridian and bladder meridian. It has the functions of sweating, dispelling cold, dispersing lung qi, relieving asthma, inducing diuresis and reducing swelling. (1) Raw products are sweating, relieving exterior syndrome, promoting diuresis and reducing swelling. It is mostly used for exterior syndrome of wind-cold syndrome, edema due to geomantic omen, arthralgia due to rheumatism, and phlegm-core due to yin gangrene. ② Ephedra honey is warm and moist, and the effect of pungent sweat is reduced, so it can disperse lung and relieve asthma. It is mostly used for patients with mild exterior syndrome, lung qi deficiency and severe cough and asthma. ③ Ephedra pilose antler is mild and suitable for the elderly, children and the weak. Usage is similar to ephedra. ④ Honey, ephedra and pilose antler have mild effects, and are suitable for the elderly, children and patients with physical weakness whose symptoms have been solved but cough and asthma have not healed. The usage is similar to that of honey-roasted ephedra.