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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Tamsulosin 0.4 mg once daily: effect on sexual function in patients with lower urinary tract symptoms suggestive of benign prostatic obstruction.

OBJECTIVE: To evaluate the effect of tamsulosin, 0.4 mg once daily, on sexual function in comparison with placebo and alfuzosin, 2.5 mg three times daily, in patients with lower urinary tract symptoms (LUTS) suggestive of benign prostatic obstruction (BPO). METHODS: Data from 830 patients randomized into three European multicenter studies with similar protocols were analyzed. In two studies, patients were randomized to receive either tamsulosin, 0.4 mg once daily, or placebo, and in the third, patients were randomized to receive either a fixed dose of tamsulosin, 0.4 mg once daily, or alfuzosin, titrated to 2.5 mg three times daily. The studies employed a 2-week placebo run-in period, followed by a 12-week study period. Sexual function was assessed by related adverse events and by a sexual function score determined from a life-style questionnaire. RESULTS: Abnormal ejaculation occurred significantly more frequently in patients treated with tamsulosin than in those receiving placebo (p = 0.045); however, the incidence of abnormal ejaculation was similar in patients receiving tamsulosin or alfuzosin in the comparative study. Abnormal ejaculation was not perceived as a major problem by the patients since it resulted in few treatment discontinuations (n = 3). It was also reversible on drug withdrawal. There was no difference between tamsulosin and placebo or alfuzosin with regard to the occurrence of decreased libido or impotence. In addition, there was no significant difference in the change in sexual function score between patients treated with tamsulosin and those treated with alfuzosin. Compared with patients receiving placebo, there was, however, a significant improvement in total sexual function score in patients receiving tamsulosin (p = 0.042). CONCLUSIONS: Tamsulosin, 0.4 mg once daily, is well tolerated and has no overall negative impact on sexual function compared with placebo or alfuzosin. Compared with placebo, tamsulosin may even improve sexual function.[1]


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