[Adverse effects of cyclosporin a observed in rheumatoid arthritis and psoriatic arthritis].

BACKGROUND

Rheumatoid arthritis (RA) and psoriatic arthritis (PA) represent diseases which often demand aggressive therapy in order to control the process and inhibit lesion formation in joints and organs. This kind of therapy can be achieved with cyclosporin A (CsA), particularly when combined with methotrexate (MTX). This combination is far more effective than single-drug therapy and is capable of significantly reducing the number of articular lesions. Considering the fact that monotherapy is associated with many adverse effects, it is feared that both drugs in combination may produce cumulative toxicity. The aim of this work was to determine the frequency of adverse effects caused by CsA in patients treated for RA and PA at the Outpatient Rheumatology Clinic of the First Public Hospital in Szczecin.

METHODS

Our study group consisted of 61 patients, including 47 with RA--35 females, mean age 51 yrs (range: 21-69 yrs), mean disease duration 9.9 yrs (range: 2-23 yrs); 12 males, mean age 51.8 yrs (range: 33-74 yrs), mean disease duration 8 yrs (range: 3-14 yrs) and 14 with PA--6 females, mean age 41.1 yrs (range: 33-55 yrs), mean disease duration 7.8 yrs (range: 2-16 yrs); 8 males, mean age 42.9 yrs (range: 35-50 yrs), mean disease duration 7.0 yrs (range: 0.5-21 yrs). All patients were on MTX. During 11 years of follow-up, CsA was withdrawn due to adverse effects in 20 patients (32.8%). The following adverse effects were observed: arterial hypertension (n=19), hand tremor (n=11), hirsutism (n=7), elevated creatinine (n=17), gingival hypertrophy (n=9), abnormal appetite (n=2), peripheral neuropathy (n=1), lymphocytosis (n=1), skin lesions (n=1), diarrhea (n=2), recurrent infections (n=1), candidiasis (n=1), zoster (n=1), and neoplasm (n=2). Adverse effects responsible for withdrawal of CsA in 14 patients (23%) appeared more frequently during the first 12 months of therapy. Our observations indicate that CsA is well tolerated. The majority of adverse effects subsided after dose reduction or temporary withdrawal of the drug.