PHARMACEUTICAL COMPOSITION

PROBLEM TO BE SOLVED: To provide a pharmaceutical composition useful for prophylaxis or therapy of diabetes etc.SOLUTION: A new pharmaceutical composition contains, as an active ingredient, an indole-N-glucoside derivative represented by formula (I) or a pharmacologically acceptable salt thereof. The pharmaceutical composition is useful for prophylaxis or therapy of disease such as diabetes, diabetic complications and obesity since the active ingredient has activity of inhibiting sodium-dependent glucose transport carrier (SGLT) and corrects high blood glucose. In the formula, Ris fluorine or chlorine and Ris hydrogen or fluorine.