RT Journal A1 Imazio M, Bobbio M, Cecchi E, et al T1 Colchicine as first-choice therapy for recurrent pericarditis: Results of the core (colchicine for recurrent pericarditis) trial JF Archives of Internal Medicine JO Archives of Internal Medicine YR 2005 FD September 26 VO 165 IS 17 SP 1987 OP 1991 DO 10.1001/archinte.165.17.1987 UL http://dx.doi.org/10.1001/archinte.165.17.1987 AB Background  Colchicine seems to be a good drug for treating recurrences of pericarditis after conventional treatment failure, but no clinical trial has tested the effects of colchicine as first-line drug for the treatment of the first recurrence of pericarditis.Methods  A prospective, randomized, open-label design was used to investigate the safety and efficacy of colchicine therapy as adjunct to conventional therapy for the first episode of recurrent pericarditis. Eighty-four consecutive patients with a first episode of recurrent pericarditis were randomly assigned to receive conventional treatment with aspirin alone or conventional treatment plus colchicine (1.0-2.0 mg the first day and then 0.5-1.0 mg/d for 6 months). When aspirin was contraindicated, prednisone (1.0-1.5 mg/kg daily) was given for 1 month and then was gradually tapered. The primary end point was the recurrence rate. Intention-to-treat analyses were performed by treatment group.Results  During 1682 patient-months (mean follow-up, 20 months), treatment with colchicine significantly decreased the recurrence rate (actuarial rates at 18 months were 24.0% vs 50.6%; P = .02; number needed to treat = 4.0; 95% confidence interval 2.5-7.1) and symptom persistence at 72 hours (10% vs 31%; P = .03). In multivariate analysis, previous corticosteroid use was an independent risk factor for further recurrences (odds ratio, 2.89; 95% confidence interval, 1.10-8.26; P = .04). No serious adverse effects were observed.Conclusion  Colchicine therapy led to a clinically important and statistically significant benefit over conventional treatment, decreasing the recurrence rate in patients with a first episode of recurrent pericarditis.