The efficacy of oral prednisone as bridge therapy in rheumatoid arthritis (RA) was studied. Forty patients starting aurothioglucose were randomized to receive either prednisone or placebo for 18 weeks. The dose was 10 mg/day in the first 12 weeks, 7.5 mg/day in weeks 13 and 14, 5 mg/day in weeks 15 and 16, and 2.5 mg/day in weeks 17 and 18. Patients were followed for 44 weeks. We found that disease activity was significantly lower in the prednisone group as early as week 1 and continued up to week 12. Response to prednisone was noticed in 60% of the patients. After tapering prednisone, a rebound deterioration was noticed at weeks 20 and 24 in 58% of the responders. No significant differences in X-ray progression were found between the two groups. We concluded that oral prednisone (10 mg/day) significantly reduces short-term disease activity in 60% of patients with active RA. The rebound deterioration after tapering the dose means that bridge therapy with prednisone using this dose-reduction scheme is not recommended.