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Original Article
Volume 333:137-142 July 20, 1995 Number 3
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Combination Therapy with Cyclosporine and Methotrexate in Severe Rheumatoid Arthritis
Peter Tugwell, M.D., Theodore Pincus, M.D., David Yocum, M.D., Michael Stein, M.D., Oscar Gluck, M.D., Gunnar Kraag, M.D., Robert McKendry, M.D., John Tesser, M.D., Philip Baker, B.Sc., George Wells, Ph.D., for The Methotrexate–Cyclosporine Combination Study Group

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ABSTRACT

Background Patients with severe rheumatoid arthritis who are treated with methotrexate frequently have only partial improvement.

Methods In a six-month randomized, double-blind trial, we compared combination therapy with cyclosporine (2.5 to 5 mg per kilogram of body weight per day) and methotrexate (at the maximal tolerated dose) with methotrexate and placebo in 148 patients with rheumatoid arthritis who had residual inflammation and disability despite partial but substantial responses to prior methotrexate treatment. The primary outcome measure was the change in the number of tender joints.

Results As compared with the placebo group, the patients in the treatment group had a net improvement in the tender-joint count of 25 percent, or 4.8 joints (95 percent confidence interval, 0.7 to 8.9; P = 0.02), and in the swollen-joint count of 25 percent, or 3.8 joints (95 percent confidence interval, 1.3 to 6.3; P = 0.005); improvement in overall disease activity as assessed by the physician (19 percent, P<0.001) and the patient (21 percent, P<0.001); and improvement in joint pain (23 percent, P = 0.04) and in the degree of disability (26 percent, P<0.001). Thirty-six patients (48 percent) in the cyclosporine group and 12 patients (16 percent) in the placebo group (P<0.001) met the 1993 criteria for improvement of the American College of Rheumatology (more than 20 percent improvement in the numbers of both swollen and tender joints and improvement in three of five other variables). Serum creatinine concentrations increased by a mean of 0.14±0.27 mg per deciliter (12±24 mmol per liter) in the cyclosporine group and by 0.05±0.19 mg per deciliter (4±17 mmol per liter) in the placebo group (P = 0.02).

Conclusions Patients with severe rheumatoid arthritis and only partial responses to methotrexate had clinically important improvement after combination therapy with cyclosporine and methotrexate. Side effects were not substantially increased. Long-term follow-up of patients treated with this combination is needed.


Source Information

From the Department of Medicine and the Clinical Epidemiology Unit, University of Ottawa, Ottawa, Ont., Canada (P.T., G.K., R.M., P.B., G.W.); the Division of Rheumatology and Immunology, Vanderbilt University, Nashville (T.P., M.S.); the Division of Rheumatology and Immunology, University of Arizona, Tucson (D.Y.); and the Arizona Rheumatology Center, Phoenix (O.G., J.T.).

Address reprint requests to Dr. Tugwell at the Department of Medicine, University of Ottawa and Ottawa General Hospital, 501 Smyth Rd., Rm. LM12, Ottawa, ON K1H 8L6, Canada.

Full Text of this Article


Related Letters:

Cyclosporine and Methotrexate for Severe Rheumatoid Arthritis
Schlesinger N., Huppert A., Hoch S., Malleson P., Steinberg A. D., Rosh J. R., Birnbaum A. H., van de Rijn M., Kamel O. W., Storb R., Thomas E. D., Tugwell P., Yocum D., Pincus T., Wells G.
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N Engl J Med 1995; 333:1567-1569, Dec 7, 1995. Correspondence

Etanercept in Rheumatoid Arthritis
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N Engl J Med 1999; 340:2000-2001, Jun 24, 1999. Correspondence

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