© 1990 British Society for Rheumatology
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EVALUATION OF SULPHASALAZINE IN ANKYLOSING SPONDYLITISAN INTERVENTIONAL STUDY
Centre for Rheumatic Diseases, University Department of Medicine Royal Infirmary, Glasgow G4 0SF
Sulphasalazine has recently been shown to have an effect in ankylosing spondylitis but the clinical indication for its use is controversial. We have used an intervention study design to investigate the clinical and laboratory effects of sulphasalazine in a group of 20 patients with active ankylosing spondylitis and peripheral joint disease. Following an initial assessment period, patients were treated with sulphasalazine for 24 weeks and the drug was then withdrawn and the patients monitored for a further 12 weeks. Significant improvements were observed in chest expansion, number of active joints, ESR and CRP which deteriorated after withdrawal of sulphasalazine. No change in spinal mobility was demonstrated. The interventional design may be a useful screening procedure for identifying potential second line drugs in ankylosing spondylitis.
KEY WORDS: Ankylosing spondylitis, Sulphasalazine, Interventional study, Second line effect