Marc Émile Pierre Adolphe Tiffeneau (November 5, 1873 – May 20, 1945) was a French chemist who co-discovered the Tiffeneau-Demjanov rearrangement.

In 1899 he graduated from the École de pharmacie de Paris, and afterwards began work as a pharmacy intern in Paris hospitals. In 1904 he was named chief pharmacist at the Hôpital Boucicaut,^[1] and from 1927, worked in a similar capacity at the Hôtel-Dieu de Paris. From 1926 to 1944 he was a professor of pharmacology to the faculty of medicine at the Sorbonne.^[2]

He also sat as one of the four members of the Drug Supervisory Body (predecessor of the International Narcotics Control Board) from 1933 until his death.^[3][4]

Tiffeneau received his Ph.D in sciences in 1907 and his Ph.D in medicine in 1910.^[2] He was a member of the Académie Nationale de Médecine (from 1927), dean to the faculty of medicine (1937) and a member of the Académie des Sciences (from 1939).^[1] At the time of his death in 1945 he was president of the Société chimique de France.^{[citation needed]}

• Le système nerveux autonome sympathique et parasympathique, 1923; (translation of John Newport Langley).
• Abrégé de pharmacologie, 1926, 7th edition 1947.
• Les Amines biologiques, 1934; (preface by Tiffeneau).^[5]
• Vade-mecum de médecine pratique, 1940.^[2]