title: Pancytopenia induced by the interaction between methotrexate and trimethoprim-sulfamethoxazole.
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000890:Anti-Infective Agents / Q000008:administration & dosage / Q000009:adverse effects*; D004338:Drug Combinations / Q000008:administration & dosage / Q000009:adverse effects; D004359:Drug Therapy, Combination; D005260:Female; D006801:Humans; D008727:Methotrexate / Q000008:administration & dosage / Q000009:adverse effects*; D010198:Pancytopenia / Q000139:chemically induced*; D011565:Psoriasis / Q000188:drug therapy*; D013420:Sulfamethoxazole / Q000008:administration & dosage / Q000009:adverse effects*; D014295:Trimethoprim / Q000008:administration & dosage / Q000009:adverse effects*; D015662:Trimethoprim, Sulfamethoxazole Drug Combination
chemical_list: D000890:Anti-Infective Agents; D004338:Drug Combinations; D015662:Trimethoprim, Sulfamethoxazole Drug Combination; D014295:Trimethoprim; D013420:Sulfamethoxazole; D008727:Methotrexate