This site "offers the latest federally approved information on HIV/AIDS clinical research, treatment and prevention, and medical practice guidelines for people living with HIV/AIDS, their families and friends, health care providers, scientists, and researchers."
This site offers "information to help answer health questions. MedlinePlus brings together authoritative information from NLM, the National Institutes of Health (NIH), and other government agencies and health-related organizations....MedlinePlus also has extensive information about drugs, an illustrated medical encyclopedia, interactive patient tutorials, and latest health news." Includes content in English and Spanish.
This site features "medical information available free online," including content from publications including The Merck Manual: Home Edition, The Merck Manual of Health & Aging, The Merck / Merial Manual for Pet Health, The Merck Manual of Diagnosis and Therapy, and The Merck Manual of Geriatrics.
As "the consumer Web portal of the Physicians’ Desk Reference," this site "offers consumer-friendly explanations of disease states and conditions as well as the safe and effective use of prescription and non-prescription drugs as well as herbal medicines."