MedlinePlus is the National Library of Medicine's web site for consumer health information. It provides links to reliable health information for consumers and health professionals. MedlinePlus has extensive information from the National Institutes of Health and other trusted sources on over 650 diseases and conditions. There are also lists of hospitals and physicians, a medical encyclopedia and a medical dictionary, health information in Spanish, extensive information on prescription and nonprescription drugs, health information from the media, and links to thousands of clinical trials. MedlinePlus is updated daily.