MedlinePlus This link opens in a new windowMedlinePLUS, hosted by the U.S. National Library of Medicine, seeks to provide consumers with authoritative, up-to-date health information. Users can browse through over 700 topic areas (reviewed and updated every six months), and links are provided to over 1250 expert organizations. MedlinePLUS also offers a medical dictionary and encyclopedia, drug information, tutorials, information about diagnostic tests, and daily news updates. Access to MedlinePLUS is unrestricted.