From MEDLINEPlus, a service of the U.S. National Library of Medicine and the National Institutes of Health

PBS FRONTLINE® examines the controversy over complementary and alternative medicine.

This information resource, presented by Memorial Sloan Kettering Cancer Center, provides evidence-based information about herbs, botanicals, supplements, and more.

From the University of Maryland Medical Center. Check for potential interactions between drugs. This tool also contains information on herbs.