Search for information on a disease, symptom, physical sign, non-brand drug or common laboratory abnormality.

A medical database focused on family practice.

Extensive knowledge base of medical information on symptoms, diagnosis, and misdiagnosis of more than 20000 medical conditions.

A Cabinet department of the United States government with the goal of protecting the health of all Americans and providing essential human services.

Leading research to understand, treat, and prevent infectious, immunologic, and allergic diseases.

The most reliable and current women's health resource with information on more than 800 topics.

Read doctor-produced health and medical information written for you to make informed decisions about your health concerns.

Award-winning, trustworthy, and credible health information and tools for patients from American Academy of Family Physicians.

Your source for reliable health information from the Federal government.

Health information from the National Library of Medicine.

RevolutionHealth.com provides information, inspiration and tools to help you take control of your health and improve your life.

Free, accurate and independent advice on more than 24,000 prescription drugs, over-the-counter medicines & natural products.

Health information for consumers on first aid for medical emergencies, accidents and injuries, symptoms and treatment of disease and health conditions.

NIAMS leads the Federal effort on research into the causes, treatment, and prevention of arthritis and musculoskeletal and skin diseases.

The leading source for trustworthy and timely health and medical news and information.

A complete database of worldwide medications providing information on the drugs, indications, fetal risk, breastfeeding risk, during pregnancy, according to the FDA.

All Acronyms is the most comprehensive and user-friendly dictionary for all acronyms and abbreviations.

Mycology Online is a joint project of the Mycology Unit at SA Pathology and School of Molecular & Biomedical Science at the University of Adelaide.

The National Organization for Rare Disorders (NORD) provides advocacy, education and other services to improve the lives of all people affected by rare diseases.