First Aid for the USMLE Step 1 2023 (Thirty-Third Edition)

First Aid for the USMLE Step 1 2023 by Tao Le and Vikas Bhushan is the annually updated high-yield review used by medical students preparing for the United States Medical Licensing Examination Step 1.

Step 1 tests basic science knowledge across biochemistry, physiology, pharmacology, pathology, microbiology, immunology, anatomy, and behavioral science in an integrated, systems-based format. This review consolidates the high-yield facts, mnemonics, and tables that appear most frequently on the exam into a single organized reference students can use alongside their dedicated study resources.

The book is organized into sections covering exam preparation strategies, high-yield basic science content by discipline and organ system, rapid review tables, and a collection of classic exam presentations. Each organ system chapter covers relevant anatomy, physiology, pathology, and pharmacology together, reflecting the integrated format of the actual exam.

The 2023 Thirty-Third Edition includes updated content aligned with the current Step 1 exam blueprint, revised illustrations and tables, new mnemonics, and corrections and additions submitted by students and faculty from medical schools across the country.

Medical students in their dedicated Step 1 study period use First Aid as the central framework around which they build their review, cross-referencing it with question banks and other resources to identify high-yield gaps and reinforce tested concepts.