What is the difference between homeopathic medicine and holistic medicine?

Homeopathy. Homeopathy is a separate system of medicine, and is by definition "holistic" -- prescriptions are made for whole beings rather than parts. Homeopathy was developed by german physician dr. Samuel hahnemann, and is known for the principle of "like cures like, " and use of the minimum dose. Other holistic systems of medicine include acupuncture and ayurveda, but these have different backgrounds.
Scope of treatment. Homeopathic medicine uses small doses of substances that would create the symptoms being treated. Holistic medicine aims at providing whatever the patient needs to support their health and healing, which might include homeopathic medicine. Pharmaceuticals, nutrition, counseling, bodywork, acupuncture, etc.