Astragalus (aka astragalus membranaceus) is a popular herb in China where it reported to strengthen one's qi.  It is (in Chinese medicine) associated with the spleen and lungs.  Astragalus can help with a number of symptoms including fatigue, lack of appetite, upper respiratory infections, shortness of breath, wasting, and the coxsackie virus.

Lately astragalus has been getting some press as an aids drug alternative.

Taking astragalus with decongestants, diabetes drugs, or anesthesia can cause problems.  Astragalus can cause excess bleeding as well.

All in all, astragalus is considered pretty benign though.

Please note that many of the cures on this website are in a state of incomplete progress. To simplify, I have created a 'best natural cures' page which I believe contain the most effective, non-drug, non-surgical cures available.