title: Methotrexate toxicity in a patient receiving trimethoprim-sulfamethoxazole.
abstract: A 61-year-old patient with rheumatoid arthritis receiving treatment with methotrexate developed bone marrow hypoplasia after treatment with trimethoprim-sulfamethoxazole. The bone marrow recovered after stopping methotrexate.
mesh_terms: D001172:Arthritis, Rheumatoid / Q000150:complications / Q000188:drug therapy; D001855:Bone Marrow Diseases / Q000139:chemically induced*; D004338:Drug Combinations / Q000009:adverse effects / Q000627:therapeutic use; D004347:Drug Interactions; D005260:Female; D006801:Humans; D008727:Methotrexate / Q000009:adverse effects* / Q000627:therapeutic use; D008875:Middle Aged; D013420:Sulfamethoxazole / Q000009:adverse effects* / Q000627:therapeutic use; D014295:Trimethoprim / Q000009:adverse effects* / Q000627:therapeutic use; D015662:Trimethoprim, Sulfamethoxazole Drug Combination
chemical_list: D004338:Drug Combinations; D015662:Trimethoprim, Sulfamethoxazole Drug Combination; D014295:Trimethoprim; D013420:Sulfamethoxazole; D008727:Methotrexate