Joint riumachi or one of the inflammation characteristic arthritis of type of other things or the method where it remedies or prevents plural conditions, or includes the fact that the composition which contains three oxidation two arsenics of the effective quantity is prescribed to the affection patient. The composition which includes three oxidation two arsenics can be prescribed orally for example the solution medicine, the suspension medicine, the syrup medicine, the emulsion, as a tablet or capsule medicine.関節リウマチまたは他のタイプの炎症性関節炎の1つまたは複数の症状を治療または予防する方法は、有効量の三酸化二ヒ素を含有する組成物を罹患患者に投与することを含む。三酸化二ヒ素を含む組成物は、例えば溶液剤、懸濁剤、シロップ剤、乳剤、錠剤またはカプセル剤として、経口的に投与され得る。