Christian Friedrich Samuel Hahnemann (1755–1843) was a German physician, translator and writer who developed the system later called homeopathy. His ideas emerged during a period when medicine included practices such as bloodletting and large doses of toxic substances.
Early life and medical work
Hahnemann was born in Meissen in Saxony on 10 April 1755. He studied medicine and earned a medical degree in 1779. Alongside periods of medical practice, he worked extensively as a translator of scientific and medical texts.
The cinchona account
While translating William Cullen’s materia medica, Hahnemann disagreed with Cullen’s explanation of cinchona bark. Hahnemann reported taking the substance himself and experiencing symptoms that he considered similar to intermittent fever. This episode is traditionally presented as a step toward his “like cures like” idea.
The account is part of homeopathy’s intellectual history. It was not a modern blinded clinical experiment and should not be treated as proof that the principle works.
1796: the new principle
In 1796 Hahnemann published an essay setting out a new approach to testing medicinal substances and matching them to symptoms. Historical scholarship commonly uses this publication as a starting point for homeopathy.
1807 and the name “homeopathy”
Hahnemann used the term “homeopathic” in print in 1807. The word was formed from Greek roots often translated as “similar suffering”. He contrasted it with approaches based on contrary effects.
1810: the first Organon
The first edition of Hahnemann’s Organon appeared in 1810. Later editions revised his instructions and theory. The text discusses the law of similars, testing substances on healthy people, individualised case-taking and the preparation of remedies. Homeopathic practice continued to change after this first edition.
Later years
Hahnemann lived and worked in several German towns and moved to Paris in 1835. He continued practising and revising his work there until his death on 2 July 1843.
Claims that need qualification
- “He proved homeopathy scientifically.” He proposed and developed the system; his observations do not meet current standards for establishing clinical effectiveness.
- “Homeopathy has never changed.” Hahnemann revised his own text, and later practitioners developed differing classical, clinical, complex and protocol approaches.
- “Old medical practices make homeopathy effective.” Criticising harmful historical medicine does not prove a different treatment works.
Continue with the wider history of homeopathy or the comparison of current method labels.
Sources
- Journal of the Royal Society of Medicine: A brief history of homeopathy
- History of Science and Medicine: theory, history and status of the principle of similars
- NHS 111 Wales: Homeopathy
Source check: 31 August 2026.