Homeopathy is a system of alternative medicine created in 1796 by Samuel Hahnemann based on his doctrine of "like cures like" (similia similibus curentur), a claim that a substance that causes the symptoms of a disease in healthy people would cure similar symptoms in sick people.
Homeopathy is a pseudoscience – a belief that is incorrectly presented as scientific. Homeopathic preparations are not effective for treating any condition; large-scale studies have found homeopathy to be no more effective than a placebo, suggesting that any positive feelings that follow treatment are only due to the placebo effect and normal recovery from illness.

Homeopathy is not a plausible system of treatment, as its dogmas about how drugs, illness, the human body, and liquids and solutions operate are contradicted by a wide range of discoveries across biology, psychology, physics, and chemistry made in the two centuries since its invention.
Although some clinical trials produce positive results, multiple systematic reviews have indicated that this is because of chance, flawed research methods, and reporting bias.
The continued practice of homeopathy, despite a lack of evidence of efficacy, has led to it being characterized within the scientific and medical communities as nonsense, quackery, and a sham.

See reference for details.

Adapted from Wikipedia, the free encyclopedia. Internet. Accessed on January 18, 2016.