Septic shock is known to lead to, at the end stage, systematic inflammatory reaction syndrome and multiple organ failure (MOF) and cause the patients' death. In both diseases, the patient dies finally of MOF, and the infiltration by inflammatory cells plays a key role for MOF. Thus, development of therapeutic agents for septic shock by suppressing the infiltration by inflammatory cells has been desired. To provide a therapeutic or preventive agent for shock, comprising as an active ingredient a diaminotrifluoromethylpyridine derivative represented by the formula (I) or its salt: wherein X is a cycloalkylcarbonyl group, an alkenylcarbonyl group, a thiophenecarbonyl group or a benzoyl group which may be substituted by a halogen atom； and Y is an alkylsulfonyl group.
