Free COMLEX-USA® Practice

COMLEX  Level 1 is the first of three mandatory licensure examinations for Doctor of Osteopathic Medicine (DO) students, designed to assess foundational medical science knowledge and clinical problem-solving. The Level 1 exam is a comprehensive, one-day assessment that uniquely integrates traditional subjects like anatomy and pharmacology with Osteopathic Principles and Practice (OPP) and Osteopathic Manipulative Treatment (OMT). Level 1 is a pass/fail exam, serving as a critical competency benchmark that students typically challenge at the end of their second year of medical school. Success on this exam is a prerequisite for entering clinical rotations and eventually advancing to the scored Level 2-CE, making it the foundational gatekeeper for a career in osteopathic medicine.

While the transition to pass/fail for COMLEX Level 1 has shifted the focus toward competency rather than high scores, the exam remains challenging due to its heavy integration of OPP and long, complex clinical vignettes. Most students find that 6 to 8 weeks of dedicated study using osteopathic-specific question banks is sufficient for success. Ultimately, if you are consistently passing your self-assessments, you are well-positioned to meet the passing threshold on test day. 

If you are an osteopathic student planning to take both exams, you should generally take the USMLE Step 1 first, followed by the COMLEX Level 1 approximately 3 to 7 days later. This USMLE-first strategy is recommended because the USMLE requires a deeper, more conceptual mastery of foundational sciences and multi-step reasoning, providing a rigorous base for your preparation. Once the USMLE is complete, the short gap allows you to pivot your focus exclusively to OPP and OMT, which are unique to the COMLEX. By tackling the more conceptually demanding USMLE while your basic science knowledge is at its peak and then quickly layering on osteopathic specificities, you maximize your efficiency and capitalize on the significant content overlap between the 2 board exams.

The best way to study for the COMLEX is to use a balanced strategy that integrates foundational medical sciences with a dedicated focus on OPP. The most efficient study method involves using high-yield question banks that mimic the exam’s clinical vignette style, allowing you to practice the multi-step reasoning required for diagnosis and management. Because the exam includes a significant portion dedicated to OMT, successful candidates typically incorporate a specialized review of musculoskeletal mechanics and osteopathic philosophy throughout their preparation. Regularly scheduled self-assessment exams are essential to gauge your readiness and ensure you are meeting the competency threshold while helping you build the mental endurance needed for a full day of testing.