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Sexually Transmitted Diseases Among Men Who Use Erectile Dysfunction Drugs FREE

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The summary below is from the full report titled “Sexually Transmitted Diseases Among Users of Erectile Dysfunction Drugs: Analysis of Claims Data.” It is in the 6 July 2010 issue of Annals of Internal Medicine (volume 153, pages 1-7). The authors are A.B. Jena, D.P. Goldman, A. Kamdar, D.N. Lakdawalla, and Y. Lu.

Ann Intern Med. 2010;153(1):I-44. doi:10.7326/0003-4819-153-1-201007060-00001
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What is the problem and what is known about it so far?

Erectile dysfunction (ED), or impotence, is an inability to get or keep an erection firm enough for sexual intercourse. Causes can be psychological or physical. Physical causes include advanced age, heavy drinking, chronic diseases (such as diabetes or high blood pressure), hormonal abnormalities (such as low testosterone levels), and use of some drugs (such as some treatments for high blood pressure or depression). Phosphodiesterase-5 inhibitors are drugs available to treat ED. Commonly prescribed ED drugs include sildenafil (known by the brand name Viagra [Pfizer, New York, New York]), vardenafil (known by the brand name Levitra [GlaxoSmithKline, Brentford, United Kingdom]), and tadalafil (known by the brand name Cialis [Lilly, Indianapolis, Indiana]). Because up to 40% of middle-aged and older men have some degree of ED, drugs for this condition are commonly used. Risks for sexually transmitted diseases (STDs) may accompany the increased sexual activity that these drugs enable. Sexually transmitted diseases include infections with viruses or bacteria, such as HIV, chlamydia, gonorrhea, herpes, or syphilis. Little is known about the risk for STDs in men who use ED drugs.

Why did the researchers do this particular study?

To find out about the frequency of STDs in men who use ED drugs.

Who was studied?

33 968 men with at least 1 prescription for an ED drug and more than 1 million men without a prescription. All of the study participants had private insurance from 44 large companies from 1997 to 2006.

How was the study done?

The researchers used information in a billing database to determine the frequency of STDs in men with and without a prescription for an ED drug. They looked at billing codes for STDs in the year before and after a man received the first prescription for an ED drug.

What did the researchers find?

This comparison of STDs in men who did and did not have a new prescription for an ED drug from 1997 to 2006 found that both in the year before and after drug initiation, men with a prescription had higher rates of STDs than those with no prescription. The STDs that accounted for these differences were infections with HIV (the virus that causes AIDS) and chlamydia, an infection that can lead to infertility in women.

What were the limitations of the study?

This study used billing data and could not describe all of the ways in which men who use ED drugs may differ from men who do not. This study does not mean that ED drugs cause STDs.

What are the implications of the study?

When prescriptions for ED drugs are being considered, doctors and patients should discuss the risk for STDs and ways to prevent getting these diseases and transmitting them to others.





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