The present invention relates to a combination of the anti-diabetic drug metformin and the MTP (microsomal triglyceride transfer protein) inhibitor (+)-phenyl-(4-{4-[(4′-trifluoromethyl-biphenyl-2-carbonyl)-amino]-phenyl}-piperidin-1-yl)-acetic acid methyl ester and the use thereof for combined administration in the treatment or prevention of diabetes mellitus type 2 conditions. The invention further relates to products containing as first active ingredient metformin and as second active ingredient the MTP inhibitor (+)-phenyl-(4-{4-[(4′-trifluoromethyl-biphenyl-2-carbonyl)-amino]-phenyl}-piperidin-1-yl)-acetic acid methyl ester, as combined preparations for simultaneous or sequential use in the treatment or prevention of diabetes mellitus type 2; and to related pharmaceutical compositions and uses.