WHITEHOUSE STATION, N.J.--(BUSINESS WIRE)--Merck & Co., Inc. and Glenmark Pharmaceuticals Inc., USA and Glenmark Pharmaceuticals, Ltd. have reached an agreement to settle their patent litigation involving Glenmark’s challenge to Merck’s patent covering ZETIA ® (ezetimibe). Specifically, Glenmark challenged Merck’s basic compound patent, RE 37,721 (the “721 patent”) on numerous grounds.