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Nebivolol protects erectile functions compared to Metoprolol in hypertensive men with atherogenic, venogenic, psychogenic erectile dysfunction: A prospective, randomized, cross-over, clinical trial

      Highlights

      • Both hypertension itself and βeta-blocker drugs used for hypertension treatment can cause ED.
      • The anti-hypertensive effects of Nebivolol and Metoprolol are similar.
      • Nebivolol, unlike other β-blockers, may not cause impotence since it increases NO release which is the main mediator of erection.
      • Nebivolol may be advantageous in terms of preserving sexual functions in eligible hypertensive male patients.

      Abstract

      Introduction

      Both hypertension and β-blocker drugs used for treating hypertension (HT) can cause erectile dysfunction (ED). Nebivolol, unlike other β-blockers, may not cause impotence since it increases the release of Nitric Oxide (NO), which is the main mediator of erection. This study investigated the effect of Nebivolol and Metoprolol on erectile functions in hypertensive men.

      Materials and methods

      Married men whose blood pressure were >140/90 mmHg were included in the study. All patients were assessed for ED, and the cause of ED was then investigated. Nebivolol or Metoprolol was started for one month in all patients. After one-month drugless period, the β-blockers were switched. Blood pressures, pulses and sexual function tests were evaluated, and plasma NO levels were measured at the end of the treatments and during the drugless period.

      Results

      There was no difference in antihypertensive efficacy between the two drugs (p = 0.828;0.194 for systolic and diastolic BP). Metoprolol caused a significant decrease in IIEF-5 score, whereas Nebivolol did not cause a decrease in IIEF-5 score on patients with psychogenic, arteriogenic, and venous failure related ED (respectively, p<0.001,0.004,0.005 for Metoprolol; p = 0.201,0.598,0.088 for Nebivolol). In the non-ED group, both drugs decreased the IIEF-5 score, but the decrease for Metoprolol (p = 0.001) was more than that for Nebivolol (p = 0.012). Plasma NO levels did not change with Metoprolol (p = 0.268) but increased with Nebivolol (p<0.001). There was a positive correlation between plasma NO values and IIEF-5 score used for the assessment of sexual functions (r = 0.284, p = 0.026).

      Conclusion

      Nebivolol may be advantageous in terms of preserving sexual functions because of increasing NO in eligible hypertensive male patients.

      Keywords

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