Your Guide to Being Well and Staying Healthy
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Diseases & Conditions
Tap into this interactive encyclopedia for instant access to information on more than 835 diseases and conditions.
Tests & Procedures
Information on more than 370 topics, featuring illustrations designed to clarify complex anatomy and procedures.
Drug Reference
This comprehensive drug reference answers your medication questions: 33,000 prescriptions, over-the-counter products, and neutraceuticals.
Herbs, Vitamins & Supplements
Discover medically validated uses for vitamins, minerals, amino acids, and other substances used as nutritional supplements.
Wellness Library
1,700 articles on common diseases and conditions, plus fitness, nutrition, safety, workplace issues, and parenting.
Symptom Checker and Care Guides
Health Tip of the Day
Echinacea No Help for Colds
Echinacea, a popular but largely untested herbal remedy for the common cold, showed no benefit when given to people with sore throats and stuffy noses. Researchers at the University of Wisconsin gave capsules of the herb to 73 students suffering from cold symptoms. An additional 75 students with colds got a placebo, or dummy pill, made of alfalfa. After 10 days, members of both groups had gotten equally ill, the study found. Compared with the placebo, unrefined echinacea provided no detectable benefit or harm, researchers wrote in the Annals of Internal Medicine.