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Original Article
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Volume 335:16-20 July 4, 1996 Number 1
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Trimethoprim–Sulfamethoxazole (Co-Trimoxazole) for the Prevention of Relapses of Wegener's Granulomatosis
Coen A. Stegeman, M.D., Jan Willem Cohen Tervaert, M.D., Paul E. de Jong, M.D., Cees G.M. Kallenberg, M.D., for The Dutch Co-trimoxazole Wegener Study Group

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ABSTRACT

Background Respiratory tract infections may trigger relapses in patients with Wegener's granu-lomatosis in remission. Uncontrolled data have suggested that treatment with trimethoprim–sulfamethoxazole (co-trimoxazole) may be beneficial.

Methods We conducted a prospective, randomized, placebo-controlled study of the efficacy of co-trimoxazole (800 mg of sulfamethoxazole and 160 mg of trimethoprim) given twice daily for 24 months in preventing relapses in patients with Wegener's granulomatosis in remission during or after treatment with cyclophosphamide and prednisolone. Relapses and infections were assessed with predefined criteria based on clinical, laboratory, and histopathological findings. Patients were evaluated at least once every three months for signs of disease activity, compliance with the treatment regimen, side effects of the therapy, and evidence of infections. Titers of serum antineutrophil cytoplasmic antibodies were measured serially.

Results Forty-one patients were assigned to receive co-trimoxazole, and 40 to receive placebo. In 8 of the 41 patients in the co-trimoxazole group (20 percent), the drug had to be stopped because of side effects. According to life-table analysis, 82 percent of the patients in the co-trimoxazole group remained in remission at 24 months, as compared with 60 percent of those in the placebo group (relative risk of relapse, 0.40; 95 percent confidence interval, 0.17 to 0.98). There were fewer respiratory tract infections (P = 0.005) and non–respiratory tract infections (P = 0.05) in the co-trimoxazole group than in the placebo group. There were no significant differences in antineutrophil cytoplasmic antibody titers at any time. Proportional-hazards regression analysis identified treatment with co-trimoxazole as an independent factor associated with prolonged disease-free survival and a positive antineutrophil cytoplasmic antibody test at the start of treatment as a risk factor for relapse.

Conclusions Treatment with co-trimoxazole reduces the incidence of relapses in patients with Wegener's granulomatosis in remission.


Source Information

From the Department of Medicine, Division of Clinical Immunology (C.A.S., J.W.C.T., C.G.M.K.), and the Division of Nephrology (C.A.S., J.W.C.T., P.E.J.), University Hospital, Groningen, the Netherlands.

Address reprint requests to Dr. Stegeman at the Department of Internal Medicine, University Hospital, Oostersingel 59, 9713 EZ Groningen, the Netherlands.

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Related Letters:

Co-Trimoxazole in Wegener's Granulomatosis
Weir A., Lipman M., Congleton J., Stegeman C. A., Cohen Tervaert J. W., Kallenberg C. G.M.
Extract | Full Text  
N Engl J Med 1996; 335:1769-1770, Dec 5, 1996. Correspondence

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