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Int Urol Nephrol. 2007;39(2):547-52. Epub 2007 Feb 20.

Sildenafil combined with continuous positive airway pressure for treatment of erectile dysfunction in men with obstructive sleep apnea.

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Department of Urology, University of Patras, Rio, Patras, Greece.



To assess efficacy and safety of the combination of sildenafil and continuous positive airway pressure (CPAP), and satisfaction with treatment for erectile dysfunction (ED) in men with obstructive sleep apnea (OSA).


Forty men suffering from OSA and concurrent ED were treated with CPAP after a thorough investigation. After a 4-week run-in period, the patients were randomly allocated to treatment for 6 weeks; 20 men to the combination group, receiving additionally 100 mg sildenafil on demand for intercourse, and 20 men to CPAP alone. After a 1-week washout phase, the two groups switched to the other treatment arm for an additional 6 weeks period. End points for efficacy evaluation were the percentage of successful attempts for intercourse based on an event log and the overall satisfaction with sildenafil in the treatment of ED.


The patients recorded a total of 149 attempts for intercourse during the run-in phase with a success rate of 19.5%. During the 12 weeks of treatment, the success rate of intercourse attempts was 24.8% when only on CPAP and 61.1% when in combination with sildenafil (P < 0.001). Of the studied men, 70% were satisfied with the use of sildenafil while 30% remained unhappy with this additional treatment.


Sildenafil in combination with CPAP appears clearly superior to CPAP alone. The efficacy of this combination is superior to that of sildenafil alone, as reported in previous studies. Both treatment modalities are safe and well tolerated. However, approximately one-third of the patients remain unsatisfied even from the combination treatment. Further treatment options are needed.

[Indexed for MEDLINE]

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