Cordyceps is short for Cordyceps sinensis, and there are no three kinds of people who should not take Cordyceps. Cordyceps should not be used by those who have superficial evils (evils on the surface of the muscles). Cordyceps, with the effect of tonifying the kidney and benefiting the lung, stopping bleeding and resolving phlegm. It is mainly used for treating tuberculosis cough, hemoptysis, chronic cough and asthma, night sweating (abnormal sweating after going to sleep and stopping after waking up), spontaneous sweating (involuntary sweating during the daytime, aggravated by a little movement), impotence, spermatorrhea, lumbar and knee pain, and weakness after illness. Cordyceps should not be used with sedative-hypnotic drugs, which can increase the adverse effects of the drug; be cautious of using with beta-blocker drugs, which can cause cardiac depression. If you need to use Cordyceps, you must use it under the guidance of a professional doctor.