Search list for "Medicine" on Project Gutenberg last updated Ju 27, 2017.

History, Instructional for Doctors, Nursing, Patent Medicine and Quack Remedies, Public Health, Self-help books, Miscellaneous.

This is the Welcome info as quoted from their site:

Project Gutenberg offers over 54,000 free eBooks: choose among free epub books, free kindle books, download them or read them online. You will find the world's great literature here, especially older works for which copyright has expired. We digitized and diligently proofread them with the help of thousands of volunteers.
No fee or registration is required, but if you find Project Gutenberg useful, we kindly ask you to donate a small amount so we can digitize more books, maintain our online presence, and improve Project Gutenberg programs and offerings. Other ways to help include digitizing more booksrecording audio books, or reporting errors.

Instructional for Doctors

(Warning: Medical procedures and remedies described in these books may be outdated, dangerous, or illegal)