a study was made of plasma and synovial fluid levels of sulphasalazine , one of its dissociation products -- sulphapyridine and a metabolite of the latter -- acetyl sulphapyridine in patients with rheumatoid arthritis ( ra ) who were in a steady state on sulphasalazine therapy .
C0003873
rheumatoid arthritis
C0036078
sulphasalazine