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  • Title: [Adverse effects of low-dose methotrexate therapy in rheumatoid arthritis].
    Author: Furuya T, Totokawa S, Nakajima A, Suzuki T, Kashiwazaki S.
    Journal: Ryumachi; 1996 Oct; 36(5):746-52. PubMed ID: 8969553.
    Abstract:
    To analyze the possible adverse effects of low dose methotrexate (MTX) therapy, 276 patients with rheumatoid arthritis (RA) were examined retrospectively. One hundred and seven patients (39%) experienced 113 adverse events : 57 showed liver dysfunction, 24 gastrointestinal complaints, 13 cutaneous symptoms, 6 respiratory symptoms, and 6 malignancies. Interestingly, 3 patients developed a dry cough without infiltration nor interstitial shadow on chest X-ray. The cough was rapidly resolved by discontinuation of MTX, but it recurred in 1 patient when MTX was re-administered. This finding might suggest a close association between MTX administration and the occurrence of dry cough. Of the 6 patients with malignancies diagnosed during MTX therapy, 2 showed malignant lymphoma, 2 lung cancer, 1 breast cancer and 1 colon cancer. MTX might have an oncogenic potential in RA because the coincidence rate, especially with respect to lymphoma, was significantly higher than estimated in a normal population.
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