Produced by the National Library of Medicine, MEDLINEPlus provides health professionals and consumers with health information. MEDLINEplus has extensive information from the National Institutes of Health and other trusted sources on over 500 diseases and conditions. There are also lists of hospitals and physicians, a medical encyclopedia and dictionaries, health information in Spanish, extensive information on prescription and nonprescription drugs, health information from the media, and links to thousands of clinical trials.