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MSD Manuals

The Trusted Provider of Medical Information since 1899

The MSD Manuals are a comprehensive medical information source covering thousands of topics in all fields of medicine. They are offered as a free public service to health care professionals and the general public.

Choose the version that best meets your needs

  • 1000s of Topics
  • 100s of Animations
  • Numerous Photos and Illustrations
  • Self-Assessment Tools
  • Quizzes
  • 3D Models
  • Common Medical Tests
  • 1000s of Topics  
  • Dozens of Species
  • Numerous Videos and Photos
  • Clinical Calculators
  • Quizzes
  • Reference Guides
  • Case Studies, News and Editorials
Global Medical Knowledge

Our mission is simple:

The Manuals, first published in 1899 and now known as MSD Manuals outside the United States and Canada, are one of the world’s most widely used medical information resources. The Manuals are committed to making the best current medical information accessible to health care professionals and patients on every continent.

We believe that health information is a universal right and that every person is entitled to accurate and accessible medical information. We have a responsibility to protect, preserve and share the best current medical information to enable more informed decisions, enhance relationships between patients and professionals, and improve health care outcomes around the world.

That’s why we are making the Manuals available for free in digital form in multiple languages to professionals and patients around the world.

MSD and the MSD Manuals

Merck & Co., Inc., Rahway, NJ, USA (known as MSD outside the US and Canada) is a global healthcare leader working to help the world be well. From developing new therapies that treat and prevent disease to helping people in need, we are committed to improving health and well-being around the world.  The Manual was first published in 1899 as a service to the community.  The legacy of this great resource continues as the MSD Manual outside of the United States and Canada. Learn more about our commitment to Global Medical Knowledge.
MSD Manual for Mobile