This invention, regards with the medicine composition and the manufacturing process and contains the aforementioned composition the capsule medicine which include the blend of the shape medicine which does not promote the conversion to the lactam impurity to which gabapenchin and gabapenchin correspond.< Selective figure >It is not本発明は、ガバペンチンと、ガバペンチンの対応するラクタム系不純物への転換を促進しない賦形剤の混合物とを含む医薬組成物と、その調製プロセスと、前記組成物を含有するカプセル剤とに関する。【選択図】なし