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Why do patients with erectile dysfunction abandon effective therapy with sildenafil (Viagra®)?


This prospective study determined the rate of abandonment of sildenafil therapy and assessed the reasons for abandonment. Between January 2001 and December 2002, 234 patients with erectile dysfunction (ED) at three independent centers successfully began therapy with sildenafil 50 or 100 mg. The rate of noncompliance was 31%. A telephone survey of these patients was conducted to determine the reasons for abandonment. The majority reported that they had had no opportunity or desire for sexual intercourse or that their partners had shown no sexual interest. Few patients stated that the high cost of the medication or that adverse events were the cause.

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We would like to thank Thomson Physicians World GmbH for their help in writing this manuscript.

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Correspondence to T Klotz.

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Klotz, T., Mathers, M., Klotz, R. et al. Why do patients with erectile dysfunction abandon effective therapy with sildenafil (Viagra®)?. Int J Impot Res 17, 2–4 (2005).

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  • erectile dysfunction
  • sildenafil
  • PDE5 inhibitor
  • therapy abandonment
  • compliance

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