Arch Intern Med
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Review Meta Analysis
Sildenafil for male erectile dysfunction: a systematic review and meta-analysis.
To determine the efficacy and safety of sildenafil citrate in the treatment of male erectile dysfunction. ⋯ Sildenafil improves erectile function and is generally well tolerated. Treatment response seems to vary between patient subgroups, although sildenafil has greater efficacy than placebo in all evaluated subgroups.