PROBLEM TO BE SOLVED: To provide a pharmaceutical composition containing a tetrahydropyridine derivative having a monoacylglycerol acyltransferase 2 (MGAT2) inhibitory action. SOLUTION: A pharmaceutical composition containing a compound represented by the formula (I) or a pharmaceutically acceptable salt thereof. (X and Z are C (= O), etc .； L is a single bond, O, S, etc .； R is R 6 or B, etc .； A and B are independently aromatic carbocycles, etc .； R 2 is H, etc .； R 3 is an alkyl or the like； R 4a and R 4b are H or the like independently； R 5 and R 6 are halogen or the like； R 7a is H or the like； R 7b , R 8 and R 9 are H or the like； m and n are 0 to 0 Integer of 5； p is an integer of 1 to 6) [Selection diagram] None【課題】モノアシルグリセロールアシルトランスフェラーゼ２（ＭＧＡＴ２）阻害作用を有するテトラヒドロピリジン誘導体を含有する医薬組成物の提供。【解決手段】式（Ｉ）で示される化合物又はその製薬上許容される塩を含有する医薬組成物。（Ｘ及びＺはＣ（＝Ｏ）等；Ｌは単結合、Ｏ、Ｓ等；ＲはＲ６又はＢ等；Ａ及Ｂは各々独立に芳香族炭素環等；Ｒ２はＨ等；Ｒ３はアルキル等；Ｒ４ａ及びＲ４ｂは各々独立にＨ等；Ｒ５及びＲ６はハロゲン等；Ｒ７ａはＨ等；Ｒ７ｂ、Ｒ８及びＲ９はＨ等；ｍ及びｎは０～５の整数；ｐは１～６の整数）【選択図】なし
