Merck Manual

Please confirm that you are a health care professional

Yes No

Leave this Site?

The link you have selected will take you to a third-party website. We do not control or have responsibility for the content of any third-party site.

Continue Cancel

honeypot link

skip to main content

MerckManual

Professional Version

The trusted provider of medical information since 1899

VIEW CONSUMER VERSION

A A A

A A A

VIEW CONSUMER VERSION

HOME
MEDICAL TOPICS

Common Health Topics

心血管疾病 Clinical Pharmacology Critical Care Medicine Dental Disorders Dermatologic Disorders Ear, Nose, and Throat Disorders Endocrine and Metabolic Disorders 眼睛疾病 Gastrointestinal Disorders Genitourinary Disorders Geriatrics Gynecology and Obstetrics Hematology and Oncology Hepatic and Biliary Disorders Immunology; Allergic Disorders Infectious Diseases Injuries; Poisoning Musculoskeletal and Connective Tissue Disorders Neurologic Disorders Nutritional Disorders 儿科 Psychiatric Disorders Pulmonary Disorders Special Subjects

Resources

Videos Figures Images Quizzes Symptoms
View All Resources
RESOURCES

3D Models Abbreviations Audio Case Studies Clinical Calculators Conversion Tables Figures Images Lab Values Podcasts Quizzes Symptoms Tables Videos
DRUG INFO

Drugs by Name, Generic and Brand Drug Interactions Pill Identifier

Commonly Searched Drugs
NEWS

Age-Adjusted Rate of Alcohol-Induced Deaths Up From 2019 to 2020 AHA: Heart Disease Death Rates in U.S. Spiked in 2020 AHA: Once-Daily Edoxaban Seems Safe for Pediatric Cardiac Patients AHA: Those With, at Risk for CVD Less Likely to Use Wearables
View All News >
PROCEDURES

View All Procedures >
QUIZZES & CASES

Quizzes

More Quizzes

Cases

More Case Studies
ABOUT US

Overview History 必威进不了 The Manuals Staff Editorial Board and Reviewers Authors Content Providers Print Editions Mobile Apps Permissions Licensing Social Media FAQ Contact Us

Disclaimer Privacy Terms of use Contact Us Veterinary Manual

This site complies with theHONcode standard for trustworthy healthinformation:
verify here.

Medical Topics & Chapters

A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z

Professional
Resources

Resources

3D Models

Audio(37)

Figures(313)

Images(1743)

Tables

Videos(284)

Other Useful Resources

Abbreviations
Case Studies(36)
Clinical Calculators
Quizzes(756)

Brought to you by Merck & Co, Inc., Rahway, NJ, USA (known as MSD outside the US and Canada) — dedicated to using leading-edge science to save and improve lives around the world. Learn more about the Merck Manuals and our commitment toGlobal Medical Knowledge.

About
Disclaimer
Permissions
Privacy
Cookie Settings
Terms of use
Licensing
Contact Us
Veterinary Manual

This icon serves as a link to download the eSSENTIAL Accessibility assistive technology app for individuals with physical disabilities. It is featured as part of our commitment to diversity and inclusion. M

This site complies with theHONcode standard for trustworthy healthinformation:
verify here.

Copyright © 2022 Merck & Co., Inc., Rahway, NJ, USA and its affiliates. All rights reserved.