According to Traditional Chinese medicine (TCM)...cordyceps is specifically recommended for the treatment of debility following illness, fatigue, impotence, kidney disease, and upper respiratory tract disorders... cordyceps is recommended for lung problems...is also highly regarded as a tonic with properties similar to ginseng, especially immunostimulant activity. Cordyceps is regularly used in China today for treating bronchial inflammation and chronic bronchitis, pneumonia, pulmonary emphysema, and tuberculosis...Furthermore, cordyceps is well known for its ability to stimulate immune function. However, cordyceps is not recommended in cases where there is bleeding, or for individuals receiving immunosuppressant medications for bone grafts and organ transplants. In addition, cordyceps may potentiate the effects of some anticoagulant and heart medications, as well as epinephrine bronchodilators."
Source: HART Toolkit, copyright 2001