Purpose: We compared the efficacy of naftopidil with that of tamsulosin hydrochloride for 154 symptomatic benign prostatic hyperplasia (BPH) patients who also suffered from overactive bladder (OAB) symptoms.
Materials and methods: Naftopidil and tamsulosin hydrochloride were administered for eight weeks. The international prostate symptom score (IPSS), QOL index, maximum flow rate (Q(max)), residual urine volume (RUV) and side effect profile were determined before the administration and after eight weeks of treatment.
Results: In the naftopidil group, seven parameters of IPSS and QOL index were improved significantly at the endpoint compared to the baseline. In the tamsulosin group, all parameters except frequency and straining were also improved. Both drugs improved the Q(max) at the endpoint, too. The RUV did not change in both groups. Naftopidil was also superior to tamsulosin hydrochloride regarding general treatment outcome by the Japanese clinical guideline of urinary disturbance.
Conclusions: This study demonstrated that naftopidil was clinically efficacious in the treatment of BPH patients with OAB.