Penicillamine for rheumatoid arthritis.


OBJECTIVES:To estimate the short-term effects of D-penicillamine for the treatment of rheumatoid arthritis (RA). SEARCH STRATEGY:We searched the Cochrane Musculoskeletal Group's trials register, the Cochrane Controlled Trials Register, Medline up to and including December 1998 and Embase from 1988-1998. We also carried out a handsearch of the reference lists of the trials retrieved from the electronic search. SELECTION CRITERIA:All randomized controlled trials and controlled clinical trials comparing D-penicillamine against placebo in patients with rheumatoid arthritis. DATA COLLECTION AND ANALYSIS:The methodological quality of the trials was assessed independently by two reviewers (CS, EB) and checked by a third (MS) using a validated quality assessment tool. Rheumatoid arthritis outcome measures were extracted from the publications for the six-month endpoint and stratified according to D-penicillamine dosages: low (<500mg/day), moderate (500 to <1000mg/day) and high (1000 mg/day or greater). Data was abstracted by one reviewer and checked by a second (CS, MS). The pooled analysis was performed using the standardized mean difference for joint counts, pain and global assessments. The weighted mean difference was used for erythrocyte sedimentation rate (ESR). Toxicity was evaluated with pooled odds ratios for withdrawals and adverse reactions. A chi-square test was used to assess heterogeneity among trials. Fixed effects models were used throughout, since no statistical heterogeneity was found. MAIN RESULTS:Six trials were identified, with 425 patients randomized to D-penacillamine and 258 to placebo. A statistically significant benefit was observed for D-penicillamine when compared to placebo for all three-dose ranges and for most outcome measures including: tender joint counts, pain, physician's global assessments and ESR. The standardized weighted mean differences between treatment and placebo in moderate doses were -0. 51 [95% CI -0.88, -0.14] for tender joint counts, -0.56 (95% CI -0. 87, -0.26) for pain and -0.97 (95% CI -1.25, -0.70) for global assessment. The difference for ESR was -10.6 mm/hr. Similar results were observed for the higher dose group. Total withdrawals were significantly higher in the moderate and high dosage D-penicillamine groups (OR=1.63 and 2.13 respectively), mostly due to increased adverse reactions (OR = 2.60 and 4.95 respectively), including renal and hematological abnormalities. REVIEWER'S CONCLUSIONS:D-penicillamine appears to have a clinically and statistically significant benefit on the disease activity of patients with rheumatoid arthritis. Its efficacy appears to be similar to that of other disease modifying anti-rheumatic drugs (DMARDs), but with a significantly higher toxicity. Its effects on long-term functional status and radiological progression are not clear from this review.


Suarez-Almazor ME,Spooner C,Belseck E





Has Abstract


2000-01-01 00:00:00










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