The Eclectic Medical Institute was an American institution in origin, concept, and practice. For nearly a century, EMI was known as the "mecca of eclectic thinking" and the "Mother Institute" of reformed medicine. A Profile of Alternative Medicine recounts the history of eclectic medicine which, along with hydropathy, homeopathy, physiomedicalism, chiropractic, and osteopathy, competed with regular medicine (allopathy) in the nineteenth century.

This history of EMI is set within the broader context of American medicine and recounts the internal feuds, successes, adversity, and ultimate failure of this bastion of freedom in medical thought.