High Quality Content by WIKIPEDIA articles! Schering-Plough Corporation merged with Merck & Co. on November 4, 2009. 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. Schering Plough manufactures several pharmaceutical drugs, the most well-known of which are the allergy drugs Claritin and Clarinex, and through a collaboration with Merck & Co., Vytorin, an anti-cholesterol drug. Schering Plough also owns and operates the major foot care brand name Dr. Scholl's and the skin care line Coppertone. As of June 2005, Schering-Plough had 1.4% market share in the U.S., placing it seventeenth in the top twenty pharmaceutical corporations by sales compiled by IMS Health. Schering-Plough is a full member of the European Federation of Pharmaceutical Industries and Associations (EFPIA).