Rudolf Gottfried Arndt (31 March 1835 – 29 January 1900) was a German psychiatrist from Bialken, district of Marienwerder.
Arndt studied in Greifswald and Halle. As a student, his instructors included Felix von Niemeyer (1820–1871), Heinrich Adolf von Bardeleben (1819–1895), and Heinrich Philipp August Damerow (1798–1866).[1] He was conferred doctor of medicine on 20 February 1860. From 1861 he maintained a private practice, and also participated in the Second Schleswig War (1864), Austro-Prussian War (1866) and Franco-Prussian War (1870–71).
In 1867 he obtained his habilitation, subsequently serving as director of the Irren-Heil- und Pflege-Anstalt in Greifswald. In 1873 he became an associate professor of psychiatry at Greifswald.[2] He died of angina pectoris.[3]
He is known today for the "Arndt-Schulz rule", a pharmacologic principle of homeopathy that is named in conjunction with German chemist Hugo Schulz (1853-1932).[4] He is also remembered for his investigations of neurasthenia.[5][6]
