Homeopathy is a natural form of complementary medicine safely used millions of people worldwide. It's based on the principle of ‘like cures like’. In other words, a substance taken in small amounts will treat the same symptoms it causes if taken in large amounts.
The idea relating to Homeopathy dates back to Hippocrates (460-377BC), who thought that symptoms specific to an individual should be taken into account before making a diagnosis.
The idea of like curing like was re-emerged by German physician, Samuel Hahnemann (1755-1843) he came to devise the system of medicine that we know today as homeopathy. He deduced that an illness could be treated with a very small amount of a substance that, in larger quantities, could cause that illness.
To avoid harmful effects from normal doses of the substances, each medicine was diluted until it reached the greatest dilution that would still produce a response.