. . . "toxic antimetabolite that limits cellular reproduction by acting as an antagonist to folic acid; used to treat certain cancers and psoriasis and rheumatoid arthritis"@en-us . "methotrexate"@en-us . . "amethopterin"@en-us . . "0.625"^^ . "methotrexate"^^ . "methotrexate sodium"@en-us . . . . "102992545"@en-us . . . "0"^^ . "03755712-n"^^ . . . . "103615036"@en-us . "103755712"^^ . .