I suppose you've already checked the usuals like coursera, udacity, youtube courses etc.? "Medicine" is exteremely broad, but you can find some interesting intro courses to some of its aspects, e.g.:
https://www.coursera.org/courses?orderby=upcoming&search=medicine
Just some more general courses that sound interesting/useful:
Clinical Terminology for International and U.S. Students https://www.coursera.org/course/clinicalterminology
Understanding Research: An Overview for Health Professionals (looks extremely useful!) https://www.coursera.org/course/researchforhealth
Vital Signs: Understanding What the Body Is Telling Us https://www.coursera.org/course/vitalsigns
Clinical Problem Solving https://www.coursera.org/course/clinprobsolv
Introduction to Pharmacy https://www.coursera.org/course/intropharma
Introductory Human Physiology https://www.coursera.org/course/humanphysio
Plus many intro courses on genetics, neuropsychology etc.
Those are some very good tips, thanks !
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