Schering-Plough Corporation was a
United States-based pharmaceutical company. It was founded in 1851 by
Ernst Christian Friedrich Schering as
Schering AG in
Germany. In 1971, the Schering Corporation merged with Plough (founded by Memphis area entrepreneur Abe Plough in 1908) to form Schering-Plough. On November 4, 2009
Merck & Co. merged with Schering-Plough with the new company taking the name of Merck & Co.