Researchers tracked about 6500 patients with chronic health conditions for six years, and learned that homeopathic remedies helped in 70 percent of cases.
As a comparison, they also followed a similar group of patients who did not use homeopathy but, instead, used prescription medicines. After six years, these patients were found to be no better off than before they started taking the prescription medicines. -
Journal of Alternative Complementary Medicine, 2005; 11: 793-8