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Erectile dysfunction is the repeated inability to get or keep an erection firm enough for sexual intercourse. The word "impotence" is sometimes used to describe other problems that interfere with sexual intercourse and reproduction, such as lack of sexual desire and problems with ejaculation or orgasm. Erectile dysfunction is often referred to as 'impotence' although this term is no longer favored because it is not specific and has derogatory overtones. Using the term erectile dysfunction makes it clear that those other problems are not involved. Throughout this section, we will use the term "erectile dysfunction" or ED to refer to this condition.

Erectile dysfunction, or ED, can be a total inability to achieve erection, an inconsistent ability to do so, or a tendency to sustain only brief erections. These variations make defining ED and estimating its incidence difficult. Estimates range from 15 million to 30 million, depending on the definition used. According to the National Ambulatory Medical Care Survey, for every 1,000 men in the United States, 7.7 physician office visits were made for ED in 1985. By 1999, that rate had nearly tripled to 22.3. The increase happened gradually, presumably as treatments such as vacuum devices and injectible drugs became more widely available and discussing erectile function became accepted. Perhaps the most publicized advance was the introduction of the oral drug sildenafil citrate (Viagra) in March 1998. NAMCS data on new drugs show an estimated 2.6 million mentions of Viagra at physician office visits in 1999, and one-third of those mentions occurred during visits for a diagnosis other than ED.

In older men, ED usually has a physical cause, such as disease, injury, or side effects of drugs. Any disorder that causes injury to the nerves or impairs blood flow in the penis has the potential to cause ED. Incidence increases with age: About 5 percent of 40-year-old men and between 15 and 25 percent of 65-year-old men experience ED. But it is not an inevitable part of aging.

ED is treatable at any age, and awareness of this fact has been growing. More men have been seeking help and returning to normal sexual activity because of improved, successful treatments for ED. Urologists, who specialize in problems of the urinary tract, have traditionally treated ED; however, urologists accounted for only 25 percent of Viagra mentions in 1999.

Find out more about model by clicking on the topics below.

  What is Erectile Dysfunction?  

  What Causes Erectile Dysfunction?  

  How is Erectile Dysfunction Diagnosed?  

  What Are Treatments for Erectile Dysfunction?  

  Some Facts about Erectile Dysfunction  

  Frequently Asked Questions  

  Information for Partners  

  What Are These Wonder Drugs?  




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