The correct way to take Cordyceps is to take it internally in decoction soup, etc. It should be used under the guidance of a doctor. Cordyceps sinensis can be used by decocting soup for internal use, or made into pills or powder, or stewed with chicken or duck. It should be used according to the doctor’s prescription. Cordyceps is a kind of Chinese herbal medicine with sweet and flat nature. It belongs to the lung meridian and kidney meridian. It has the effects of benefiting the lungs and tonifying the kidney, stopping bleeding and resolving phlegm. It is used for kidney deficiency and essence loss (loss of essence due to kidney deficiency), spermatorrhea, impotence, lumbar and knee pain, coughing and hemoptysis with exertion, and prolonged cough and asthma. Cordyceps sinensis should not be used if there is superficial evil (evil at the surface of the muscle) such as fever, nasal congestion, runny nose and cough. Adverse effects of this product are not clear. For the treatment of diseases, it should be used rationally under the guidance of traditional Chinese medicine diagnosis.