MedLinePlus This link opens in a new windowMedlinePlus is a health information website for patients, their families and friends, and the general public. Health topic pages on MedlinePlus contain links to topic-specific searches of PubMed/MEDLINE. MEDLINE is the United States National Library of Medicine's (NLM) premier bibliographic database providing citations to biomedical literature in the following fields: medicine, nursing, dentistry, veterinary medicine, allied health, and the pre-clinical sciences.