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Use of Intralesional Verapamil to Dissolve Peyronie’s Disease Plaque: A Long-Term Single-Blind Study

      Abstract

      Objectives. Multiple conservative therapies for the treatment of Peyronie’s disease have been offered with variable and poor response rates. Calcium channel blockers have been shown in vitro and in vivo to inhibit secretion and synthesis of extracellular matrix, including collagen, glycosaminoglycans, and fibronectin, as well as causing increased collagenase and anti transforming growth factor-beta activity. Calcium antagonists, including verapamil, are effective in stimulating the remodeling and degradation of extracellular matrix in tissue by altering the metabolic pathways of fibroblasts. Recently, a pilot study (1994) showed preliminary promising results in treating plaque caused by Peyronie’s disease. This randomized single-blind placebo-based study (1994 to 1996) was undertaken to confirm the hypothesis.
      Methods. In this randomized single-blind study, 14 patients completed the study and were divided into two groups: the verapamil treatment group (n = 7) or the control saline group (n = 7). Verapamil or saline was injected directly into the Peyronie’s plaque once a week for 6 months. Patients were evaluated before and after treatment with duplex ultrasound to confirm the extent of the lesion and to measure volume of the plaque, and by interview and mailed questionnaire 3 months after treatment. Patients being treated with oral calcium antagonists were excluded from the study.
      Results. A decreased plaque volume was measured in 57% of the verapamil-treated men versus 28% in the control group (P <0.04). Penile curvature demonstrated an improvement trend of 37.71 ± 9.3° to 29.57 ± 7.3° in the verapamil-treated patients, but the difference was not significant (P <0.07). Plaque softening was noted in all patients treated with verapamil. There was significant objective improvement in plaque-associated penile narrowing in all patients in the verapamil group. Subjective plaque-associated erectile dysfunction (quality of erection) showed improvement in 42.87% of the verapamil group versus none in the control group (P <0.02). There was no local or systemic toxicity except for an occasional ecchymosis/bruise at the injection site. After a positive clinical response, plaque size, penile angulation, and symptoms continued to improve. Decrease in plaque size was noted in each of the responders in the first 3 months.
      Conclusions. This randomized single-blind study suggests that intralesional injection of calcium channel blocker may be a reasonable approach in some selected patients for the treatment of Peyronie’s disease with noncalcified plaque and penile angulation of less than 30°. Patients whose plaque failed to respond to intralesional verapamil therapy within 3 months or whose angulation was greater than 30° at presentation were more likely to benefit from surgery.
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