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以同治同是順勢療法中一個重要原則，拉丁文similia similibus curantur可翻譯成「以同類來治療同類」，指的是如某物質能使健康的人患病，那麼將此物質稀釋震盪處理後就能治療該病。^[1]例如於順勢療法中，咖啡就被用以醫治心悸、失眠。因為咖啡能導致“心悸、失眠”，所以經稀釋震盪處理後的咖啡就能治療類似咖啡引起的症狀（心悸、失眠）。

德國醫師薩穆埃爾·哈內曼，於翻釋蘇格蘭醫師及化學家威廉·庫倫（英语：William Cullen）的醫學著作時，構思出順勢療法的概念。哈內曼對庫倫以金雞納治瘧疾的理論有所質疑，就服用了一些金雞鈉樹皮以觀察其作用。隨之而來的是發燒，打冷戰和關節毒，這些都是類似於瘧疾的症狀。就此哈內曼推斷，凡有用之藥，必使健康之人得症，其症類同於欲治之病，亦即古醫術中"以同治同"之說法。^[2]但同樣是服用金雞納樹皮，老奧利弗·溫德爾·霍姆斯於1861年的實驗卻未能得出相同的結果。^[3]哈內曼的以同治同法則不過是個假設，而不是科學的定律。^[4]

相關科學研究顯示金雞納能治療瘧疾，是因內含奎寧，能殺死致病的瘧原蟲。亦即是說引起症狀的機制並非金雞納有療效的原因。^[5]

参考文献

^ 薩穆埃爾·哈內曼. The Homœopathic Medical Doctrine, or "Organon of the Healing Art". Dublin: W.F. Wakeman. 1833: iii, 48–49. Observation, reflection, and experience have unfolded to me that the best and true method of cure is founded on the principle, similia similibus curentur. To cure in a mild, prompt, safe, and durable manner, it is necessary to choose in each case a medicine that will excite an affection similar (ὅμοιος πάθος) to that against which it is employed. Translator: Charles H. Devrient, Esq.
^ Robert W. Ullman; Judyth Reichenberg-Ullman. The Patient's Guide to Homeopathic Medicine. Picnic Point Press. 1 October 1994: 1–2 [24 January 2013]. ISBN 978-0-9640654-2-0. （原始内容存档于2013-06-18）.
^ Oliver Wendell Holmes, Sr., Homoeópathy and its kindred delusions: Two lectures delivered before the Boston Society for the Diffusion of Useful Knowledge, Boston, 1842 as reprinted in Oliver Wendell Holmes, Sr., Currents and Counter-currents in Medical Science, Ticknor and Fields: 72–188, 1861, OCLC 1544161, OL 14731800M
^ The Dental Cosmos: A Monthly Record of Dental Science （页面存档备份，存于互联网档案馆）, Editor Edward C. Kirk, D.D.S., Vol. XXXVI, p. 1031-1032
^ Atwood, Kimball. Homeopathy and Evidence-Based Medicine: Back to the Future. Science Based Medicine. January 4, 2008 [September 9, 2013]. （原始内容存档于2014-09-11）.

[Hahnemann-1] 薩穆埃爾·哈內曼. The Homœopathic Medical Doctrine, or "Organon of the Healing Art". Dublin: W.F. Wakeman. 1833: iii, 48–49. Observation, reflection, and experience have unfolded to me that the best and true method of cure is founded on the principle, similia similibus curentur. To cure in a mild, prompt, safe, and durable manner, it is necessary to choose in each case a medicine that will excite an affection similar (ὅμοιος πάθος) to that against which it is employed. Translator: Charles H. Devrient, Esq.

[UllmanReichenberg-Ullman1994-2] Robert W. Ullman; Judyth Reichenberg-Ullman. The Patient's Guide to Homeopathic Medicine. Picnic Point Press. 1 October 1994: 1–2 [24 January 2013]. ISBN 978-0-9640654-2-0. （原始内容存档于2013-06-18）.

[Holmes-3] Oliver Wendell Holmes, Sr., Homoeópathy and its kindred delusions: Two lectures delivered before the Boston Society for the Diffusion of Useful Knowledge, Boston, 1842 as reprinted in Oliver Wendell Holmes, Sr., Currents and Counter-currents in Medical Science, Ticknor and Fields: 72–188, 1861, OCLC 1544161, OL 14731800M

[Kirk-4] The Dental Cosmos: A Monthly Record of Dental Science （页面存档备份，存于互联网档案馆）, Editor Edward C. Kirk, D.D.S., Vol. XXXVI, p. 1031-1032

[Atwood-BTTF1-5] Atwood, Kimball. Homeopathy and Evidence-Based Medicine: Back to the Future. Science Based Medicine. January 4, 2008 [September 9, 2013]. （原始内容存档于2014-09-11）.

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以同治同

参考文献

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