title: Toxicity from methotrexate may be dose related.
mesh_terms: D001172:Arthritis, Rheumatoid / Q000188:drug therapy*; D004305:Dose-Response Relationship, Drug; D006801:Humans; D008727:Methotrexate / Q000008:administration & dosage / Q000009:adverse effects*
chemical_list: D008727:Methotrexate