Harrison's 21st edition:
the voice of clinical reason

Harrison’s Principles of Internal Medicine is the most trusted clinical medical resource for health care professionals worldwide.

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What's inside?

Featuring updated content and resources from the best minds in medicine, Harrison’s 21st edition is the authoritative voice supporting current and future clinicians and public health organizations.

New
challenges

Covid-19
Vaccine hesitancy
Precision medicine
Health disparities

New possibilities

The latest clinical innovations
Insights from renowned editors and contributors

New understanding

Expertly curated summaries of the latest research
Mastery of new disease mechanisms and related therapeutics

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Take a closer look

Free Chapter
The Practice of Medicine

Get an exclusive preview of a sample chapter covering the enduring values of the medical professional, including the science and art of medicine, clinical skills and the management of patient care.

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Harrison’s Podclass
featuring guest participant Dr Joseph Loscalzo

Dr Loscalzo shares his views on an approach to cardiac symptoms and the importance of combining physical exam with new technologies for optimal patient management.

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To read the sample chapter, please complete the form below

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The latest clinical trials results and treatment recommendations

Get critical insights and cutting-edge techniques from the experts driving the most pioneering advances in medicine. Harrison’s is your essential guide to evidence-based care and optimal patient outcomes.

The world-renowned resource

Harrison’s remains the most trusted resource in a world influenced by endless sources of medical information. The most timely and comprehensive updates from the world’s top experts are featured in the 21st edition.

For academic institutions

Medical school students, faculty and learning clinicians need this new edition for their curriculum studies.

For medical practitioners

Practicing clinicians need this new edition to enable competent practice, lifelong learning, and to aid continuous professional development and certification.

For companies providing care

Managed healthcare companies need this edition to provide the best possible patient care while supporting ongoing staff development and qualifications.