CHATTANOOGA, Tenn.--(BUSINESS WIRE)--Chattem, Inc. (NASDAQ: CHTT) announced that, pursuant to the terms of the indentures (the “Indentures”) governing its 2.00% convertible senior notes due 2013 and 1.625% convertible senior notes due 2014 (collectively, the “Notes”), it anticipates that a Fundamental Change (as such term is defined in the respective Indentures) may occur on or after February 9, 2010 (the “Fundamental Change”) as a result of the proposed transactions contemplated by the Agreement and Plan of Merger, dated December 20, 2009 (the "Merger Agreement"), among Chattem, sanofi-aventis, a French société anonyme ("sanofi"), and River Acquisition Corp., a Tennessee corporation and an indirect wholly-owned subsidiary of sanofi ("Merger Sub").