PROBLEM TO BE SOLVED: To provide autoimmune disease treatments that may be applied in high doses to patients.SOLUTION: This invention provides a pharmaceutical composition for treating an autoimmune disease comprising a pharmaceutically acceptable carrier and an agent capable of activating CD4CD25regulatory T cells, wherein the composition is to be administered to a subject in a dose of the agent from 10 mg to 200 mg.【課題】高用量で患者に適用できる自己免疫疾患の治療法の提供。【解決手段】薬学的に許容される担体と、CD4+CD25+制御性T細胞を活性化可能な剤とを含む自己免疫疾患を治療するための医薬組成物であって、剤の用量が10mg~200mgで対象に投与される医薬組成物の提供。【選択図】なし