This invention provides a combination drug composition and a combination use of pharmaceuticals for preventing and/or treating dyslipidemia states such as hyper LDL cholesterolemia in mammals including humans. This invention pertains to a drug composition for preventing and/or treating dyslipidemia and the like said drug composition comprising the following: (R) 2 [3 [[N (benzoxazole 2 yl) N 3 (4 methoxyphenoxy)propyl]aminomethyl]phenoxy] butyric acid a salt thereof or a solvate of either and an omega 3 fatty acid or an ester derivative of an omega 3 fatty acid.