Statistics from Altmetric.com
Pulsed methotrexate (MTX) treatment, of which the standard dose for Japanese patients with rheumatoid arthritis (RA) approved by the National Health Insurance System is 2–8 mg/week, is still the standard regimen. However, life threatening adverse reactions to this treatment, including lung injury, remain to be elucidated in detail.
We treated 11 patients with RA who developed lung injury during MTX treatment. Their clinical and laboratory features were examined retrospectively, focusing mainly on the changes in peripheral blood lymphocyte count.
The 11 patients (three men, eight women) had a mean (SD) age of 69.8 (7.8) years. All the patients had taken non-steroidal anti-inflammatory drugs, and nine had received steroids with a mean (SD) prednisolone dose of 6.6 (2.9) mg/day.
All of them responded well to MTX, when evaluated by American College of Rheumatology 20 core set.1 The dose of MTX had been increased …