Featured Content
Featured Content
Clearing Up the Most Common Myths About Autism Spectrum Disorder
Few conditions garner as much attention—and controversy—as autism spectrum disorder (ASD), especially among parents of young children. People with ASD have difficulty developing normal social...
Listen Now - Season 5 of Merck Manuals Medical Myths Podcast
Listen Now - Season 5 of Merck Manuals Medical Myths Podcast Season 5 of the Merck Manuals Medical Myths podcast continues with a closer look at some of the most common misunderstandings around...
Mpox (Monkeypox)
Mpox is caused by the monkeypox virus, which is related to the smallpox virus and causes a similar, but usually milder, illness.
Heatstroke
Heatstroke is a life-threatening condition that results in very high body temperature and malfunction of many organ systems, which may be fatal. (See also Overview of Heat Disorders.) Heatstroke...
Merck Manuals Celebrates 125th Anniversary
First published in 1899, what started as a pocket-sized book for physicians and pharmacists has since transformed into a comprehensive digital medical reference for physicians and consumers alike. As Merck Manuals celebrates its 125th anniversary, it continues to uphold its commitment to providing accurate and trustworthy medical information.
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Test Your Knowledge
View AllCataract
Which one of the following descriptions of adverse eye conditions best describes cataract?
DID YOU KNOW...
DID YOU KNOW...
Overhydration
Drinking too much water without replacing salt can be harmful, occasionally even in healthy people.
Disclaimer
Important: The authors, reviewers, and editors of this material have made extensive efforts to ensure that treatments, drugs, and discussions about medical practice are accurate and conform to the standards accepted at the time of publication. However, constant changes in information resulting from continuing research and clinical experience, reasonable differences in opinions among authorities, unique aspects of individual clinical situations, and the possibility of human error in preparing such an extensive text mean that other sources of medical information may differ from the information on this site. The information on this site is not intended to be professional advice and is not intended to replace personal consultation with a qualified physician, pharmacist, or other health care professional. The reader should not disregard medical advice or delay seeking it because of something found on this site.
