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HIV & AIDS Health Center

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AIDS Drugs Boost Heart Attack Risk

Still, 'Cocktail' Therapy Provides More Benefit to Those With HIV
WebMD Health News

Nov. 19, 2003 -- There's little doubt that AIDS "cocktails" have led to increased survival for HIV-infected people. But a major new study shows these drugs may increase the risk of heart attack, even in relatively young survivors.

A multinational team of researchers estimate that for each year patients take this combination drug therapy, their risk of heart attack increases 26% -- at least during their initial four to six years of treatment.

Still, when the researchers took into account other risk factors associated with heart disease, they found the actual rate of heart attacks from these drugs alone was quite low. Among all the patients that died during the study period, only 6% died of heart attacks. Progression of HIV-related diseases was the leading cause of death.

After analyzing data from more than 23,000 patients in the U.S., Europe, and Australia who had been involved in other studies, the researchers report that the yearly death rate from heart attacks was less than 1% per year. Their findings are published in this week's New England Journal of Medicine.

This current study is the latest attempt to address growing concerns that AIDS cocktails -- and in particular, protease inhibitors, which have the strongest effect in fighting HIV infections -- can have a direct effect on boosting heart attack risk in those with HIV.

These drugs are known to increase blood cholesterol and fat levels -- as well as insulin resistance, a risk factor in diabetes and heart disease. The authors say that these effects are likely the primary mechanism for the increased risk of heart attacks they observed.

Still, more than half of the people who were studied were current or former smokers, and many had other risks factors for heart disease, such as high blood pressure. Many also had a high cholesterol level prior to taking these drugs.

When the researchers took into account all of these factors, they realized that the AIDS drugs contributed very little to the increase in risk.

The bottom line: AIDS cocktails are still worth the risk, say the researchers, led by Nina Friis-Moller, MD, of the Copenhagen HIV Programme at Hvidovre University Hospital.

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