Abstract
In a previous retrospective analysis, cyclosporine A (CyA) was highly efficient in treating patients with interstitial cystitis. A prospective randomized study with this immunosuppressive agent was warranted. We compared CyA to pentosan polysulfate sodium (PPS) in patients with interstitial cystitis. A total of 64 patients with interstitial cystitis meeting the National Institute of Diabetes and Digestive and Kidney Diseases criteria were enrolled in a randomized prospective study. Patients were randomized in a 1:1 ratio to 1.5 mg/kg CyA twice daily (27 women, 5 men) or 100 mg PPS 3 times daily (26 women, 6 men) for a period of 6 months. The primary end point was daily micturition frequency, and secondary end points were mean and maximal voided volume, number of nocturia episodes, O'Leary-Sant symptom and problem indexes, visual analogue scale for pain, and subjective global response assessment. CyA was superior to PPS in all clinical outcome parameters measured at 6 months. Micturition frequency in 24 hours was significantly reduced in the CyA arm compared to the PPS arm (-6.7 +/- 4.7 vs -2.0 +/- 5.1 times). The clinical response rate (according to global response assessment) was 75% for CyA compared to 19% for PPS (p <0.001). Although there were more adverse events in the CyA arm than in the PPS arm, 29 patients completed the 6-month followup in both groups. CyA is more effective than PPS in interstitial cystitis.
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