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A man is considered to have erectile dysfunction if he regularly finds it difficult getting or keeping a firm enough erection to be able to have sex, or if it interferes with other sexual activity.
Most men have occasionally experienced some difficulty with their penis becoming hard or staying firm. However, erectile dysfunction (ED) is only considered a concern if satisfactory sexual performance has been impossible on a number of occasions for some time.
Since the discovery that the drug sildenafil, or Viagra, affected penile erections, most people have become aware that ED is a treatable medical condition.
Men who have a problem with their sexual performance may be reluctant to talk with their doctor, seeing it can be an embarrassing issue.
However, ED is now well understood, and there are various treatments available.

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