The TV ads talk about a four-hour erection that can be dangerous, possibly leading to emergency treatment. What treatment are they talking about, and how common is this problem?
On rare occasions, estimated to be one out of 100,000 patients using Viagra, Levitra, or Cialis, and up to 5 percent of men using injection therapy, a painful prolonged erection may occur. This is usually treated with the injection of a medication to cause the erection to resolve, and most of the time there is no long-term damage to the penis.
