Abstract |
Four weeks after bilateral nerve-sparing radical retropubic prostatectomy, men with normal erectile function before surgery were randomized to double-blind sildenafil (50 or 100 mg) or placebo nightly for 36 weeks, followed by an 8-week drug-free period before assessment of erectile function. Enrollment was prematurely ceased and only 76 men completed because, assuming a placebo response rate similar to the published literature (for example, 34% in meta-analysis), the 25% response at blinded interim review suggested a lack of treatment effect. On the contrary, spontaneous erectile function (a combined score of >or=8 for questions 3 and 4 of the International Index of Erectile Function and a positive response to 'Were erections good enough for satisfactory sexual activity?') occurred in only 4% of the placebo group (n=1 of 25) versus 27% (n=14 of 51, P=0.0156, Fisher's exact test) of the sildenafil group. Nightly sildenafil administration for 36 weeks after surgery markedly increased the return of normal spontaneous erections.
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Authors | H Padma-Nathan, A R McCullough, L A Levine, L I Lipshultz, R Siegel, F Montorsi, F Giuliano, G Brock, Study Group |
Journal | International journal of impotence research
(Int J Impot Res)
2008 Sep-Oct
Vol. 20
Issue 5
Pg. 479-86
ISSN: 1476-5489 [Electronic] England |
PMID | 18650827
(Publication Type: Journal Article, Randomized Controlled Trial, Research Support, Non-U.S. Gov't)
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Chemical References |
- Piperazines
- Purines
- Sulfones
- Sildenafil Citrate
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Topics |
- Adolescent
- Adult
- Aged
- Darkness
- Erectile Dysfunction
(prevention & control)
- Humans
- Male
- Middle Aged
- Piperazines
(adverse effects, pharmacology)
- Postoperative Care
- Prostate
(innervation, surgery)
- Prostatectomy
(methods)
- Purines
(adverse effects, pharmacology)
- Sildenafil Citrate
- Sulfones
(adverse effects, pharmacology)
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