PROBLEM TO BE SOLVED: To provide a medicine useful for the prevention or treatment of myocarditis associated with viral infection, regardless of the kind of virus, and to provide a medicine which can prevent intractable and chronic myocarditis as well as which can treat myocarditis.SOLUTION: As a result of the keenly examining by the present inventors to solve the above subject, it is found that Goreisan is unexpectedly effective in prevention, treatment, and improvement of myocarditis, particularly viral myocarditis, and the present invention is completed.COPYRIGHT: (C)2016,JPO&INPIT【課題】本発明は、ウイルスの種類に関わらず,ウイルス感染が関与する心筋炎の予防または治療に有用な医薬を提供することが本発明の課題であり,心筋炎の治療を可能にするとともに,心筋炎の難治化および慢性化を予防できる医薬を提供することが本発明の課題である.【解決手段】本発明者らは上記の課題を解決すべく鋭意検討した結果,意外にも五苓散が心筋炎,特にウイルス性心筋炎の予防,治療および改善に特に有効であることを見いだし,本発明を完成した.【選択図】図1