MedlinePlus is a patient-friendly resource that comes from the National Library of Medicine. Written in accessible language, it is searchable by disease, drugs, and more; it also includes information on doctor-ordered tests. The site can be accessed in English or Spanish.
If you need to identify an unknown drug, Pillbox can help. Search by shape, color, imprint, ingredients, or a combination. Pillbox will return images to help you identify the pill(s) you're looking for, and also provides links to further drug information on both Daily Med and the Drug Information Portal.
DailyMed is a searchable drug database that includes drug label information, adverse events and recalls, and whether the drug is safe for breastfeeding mothers. It also links to further information in MedlinePlus, PubMed, and ongoing and completed clinical trials.
LactMed is a database that provides information on the effects of specific drugs and chemicals on breast milk and breastfeeding infants. Each record provides a summary as well as links to the literature and potential alternative drugs to consider.