Arthur Carl Wilhelm Heffter (15 June 1859, in Leipzig – 8 February 1925, in Berlin) was a German pharmacologist and chemist. He was the first chairman of the German Society of Pharmacologists, and was largely responsible for the first Handbook of Experimental Pharmacology. He isolated mescaline from the peyote cactus in 1897, the first such isolation of a naturally occurring psychedelic substance in pure form. In addition, he conducted experiments on its effects by comparing the effects of peyote and mescaline on himself. Works Die chronische Bleivergiftung im Maler-Gewerbe. [S.l.] 1903 Digital edition by the University and State Library Düsseldorf. Die Auffindung von Arzneimitteln. Hirschwald, Berlin 1914 Digital edition by the University and State Library Düsseldorf. See also Heffter Research Institute References External links About: Dr. Arthur Heffter Arthur Heffter, Deutschland Databank Arthur Heffter, German Digital Register "Dr. Arthur Heffter" – The Heffter Institute Website German pharmacologists 1859 births 1925 deaths Psychedelic drug researchers Psychedelic drug advocates