Presentation Authors: Hyun Jun Park*, Sung Woo Park, Tae Nam Kim, Busan, Korea, Republic of
Introduction: It has been speculated that phosphodiesterase type 5 inhibitors may have an effect on Peyronie&[prime]s disease (PD) by inhibiting tissue remodeling after acute injury and decreasing the oxidative stress responsible for inflammation and fibrosis. This study evaluated the efficacy of tadalafil in patients with PD.
Methods: 66 patients diagnosed with PD were divided into three groups. Group 1 (20 patients) were treated with an intralesional injection of verapamil (IVI); group 2 (23 patients) were treated with 5 mg tadalafil once daily, and group 3 (23 patients) were administered IVI and 5 mg tadalafil once daily for 12 weeks. The size of plaques, degree of penile curvature, pain on erection, and severity of erectile dysfunction (ED) were evaluated at baseline and 12 weeks into the study.
Results: The mean ages of the three groups were 53.2 Â± 7.7, 56.1 Â± 8.1, and 55.3 Â± 7.1 years, respectively. No differences in age, erectile function, or duration and characteristics of PD were observed among the groups at baseline. Pain resolution was achieved in 55%, 70%, and 78.3% of patients in the groups after 12 weeks (p < 0.01). The changes in the mean degree of curvature were -4.6 Â± 3.2, -6.2 Â± 4.4, and -7.2 Â± 4.5 in the groups (p < 0.01). The changes in mean plaque size were 0.2 Â± 0.1, 0.2 Â± 0.2, and 0.3 Â± 0.2 cm2 in the groups (p < 0.01). Groups 2 and 3 showed a greater increase in the International Index of Erectile Function-erectile function domain score (0.4 Â± 0.8, 3.8 Â± 1.2, and 3.8 Â± 1.3; p < 0.01) than that in group 1. Commonly reported adverse treatment events were hematoma at the injection site (four cases), myalgia (three cases), and dyspepsia, headache, and flushing (one case each); however, no patient discontinued treatment due to adverse events.
Conclusions: The results show that 5 mg tadalafil once daily has the potential to treat PD by decreasing pain on erection, penile plaque size, degree of penile curvature, and improving erectile function. However, larger studies with a longer follow-up are needed to clarify these findings.