Homeopathy (also spelled homœopathy or homoeopathy) from the Greek words ?µ????, hómoios (similar) and p????, páthos (suffering), is a controversial system of alternative medicine. The term "homeopathy" was coined by the Saxon physician Samuel Hahnemann (1755–1843) and first published in 1796.

Homeopathy calls for treating 'like with like', a doctrine referred to as the 'Law of Similars'. The practitioner considers the totality of symptoms of a particular case, then chooses as a remedy a substance that has been reported in a homeopathic proving to produce similar symptoms in healthy subjects. The remedial substance is usually given in extremely low concentrations. Dilutions are performed by a procedure known as potentization.

With few exceptions, homeopathy is not accepted by medical doctors or scientists in the relevant fields.

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