Drugs or herbal substances commonly used in alternative_medicine, falls under the broader class of drugs called flavonoids. Some forms have been found useful in assisting in the treatment of cancers because of their ability to act as inhibitors and suppressants of tumor growths. Other types have been shown to help in the treatment of lymphatic developmental disorders. While these agents have been used for lymphedema in Europe and India there continues to be much debate of their effectiveness. In the United States the FDA has yet to approve their use.