Methotrexate suna ne da ke nufin wani fili mai guba da ake amfani da shi azaman maganin antimetabolite da antifolate a cikin maganin ciwon daji da cututtuka na autoimmune. Yana aiki ta hanyar hana haɗin DNA da RNA, wanda ke rage haɓakar ƙwayoyin cutar kansa kuma yana hana tsarin rigakafi.
