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Loscalzo, Fauci, Kasper, Hauser, Longo, Jameson
Harrison is the gold-standard internal medicine reference for UPSC CMS Paper I. Pick it for pathophysiology depth that no Indian text matches; pair with Davidson for clinical features.
Should read this if…
You can skip if…
| # | Chapter | Weight | Study note |
|---|---|---|---|
| 1 | Cardiovascular disease | high | Highest yield — STEMI, ACLS, heart failure, arrhythmias. 18+ Qs per CMS paper. |
| 2 | Endocrinology & metabolism | high | Diabetes complications, thyroid disorders, adrenal axis. 12+ Qs. |
| 3 | Infectious disease | high | TB (India-specific regimens), HIV, malaria, leptospirosis, viral hepatitis. 14+ Qs. |
| 4 | Nephrology | high | AKI, CKD, glomerulonephritis, electrolyte disorders. 8-10 Qs. |
| 5 | Hematology | medium | Anemia workup, transfusion medicine, hematologic malignancies. 6-8 Qs. |
| 6 | Respiratory | medium | COPD, asthma, ILD, pulmonary embolism. 6 Qs. |
| 7 | Neurology | medium | Stroke, seizures, Parkinson's, MS. 5-6 Qs. |
| 8 | Gastroenterology | medium | Cirrhosis, IBD, GI bleeding. 5-6 Qs. |
| 9 | Rheumatology & immunology | low | SLE, RA, vasculitis. 2-3 Qs. |
Week 1
Cardio + ECG interpretation
pp. 1490-1760
Week 2
Endo + nephro
pp. 2200-2510
Week 3
Infectious disease
pp. 900-1280
Week 4
Hematology + GI + revision
pp. 700-900, 1880-2100
Davidson's Principles and Practice of Medicine (24th ed.)
Use Davidson as your first read for clinical features and management, then go back to Harrison for pathophysiology depth.
The 21st edition is current (2025+) and aligned with NBE/UPSC expectations. 19th or 20th editions also work — Harrison changes slowly.
A focused first read takes 6-8 weeks; revision pass takes 2-3 weeks. Budget 2.5-3 months total for Harrison before the exam.
Possible if you pair Harrison with a Park PSM text (Harrison doesn't cover PSM) and a Surgery text (Harrison is internal medicine only).
Reviewed by Dr. Ananya Reddy, MBBS, AIIMS New Delhi (2018), UPSC CMS AIR-1 (2024). Last reviewed 21 July 2026.