Harrison's Principles of Internal Medicine (Vol.1 & Vol.2)

Harrison's Principles of Internal Medicine (Vol.1 & Vol.2), 21st Edition, is an internal medicine textbook published by McGraw-Hill Education / Medical. The work synthesizes findings from major clinical trials, approved therapeutics, and clinical guidelines to guide medical evaluation and patient care.

Core chapters explore clinical pathophysiology, disease mechanisms, and therapeutic management. Coverage examines disorders such as COVID, dementia, sepsis, multiple sclerosis, and lung cancer, linking the physiologic and epidemiologic foundations of signs and symptoms directly to corresponding disease chapters.

To aid clinical evaluation, the text incorporates practical decision trees, diagnostic schemas for complex presentations, and more than a dozen curated visual atlases.