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FDA approves Truvada for prevention of HIV
Drug intended for healthy patients with high risk of acquiring virus
Question of the Day
The Food and Drug Administration on Monday approved the first drug shown to reduce the risk of HIV infection before engaging in sex or other risky conduct, the latest milestone in the 30-year battle against the virus that causes AIDS.
The agency approved Gilead Sciences' pill Truvada as a preventive measure for healthy people who are at high risk of acquiring HIV through sexual activity, such as those who have HIV-infected partners. The decision comes less than two weeks after the agency approved another landmark product: the first over-the-counter HIV test that can be developed at home.
The two developments are seen as the biggest steps in years toward curbing the spread of HIV in the U.S., which has held steady at about 50,000 new infections per year for the past 15 years. An estimated 1.2 million Americans have HIV, which develops into AIDS unless it's treated with antiviral drugs. An estimated 240,000 HIV carriers are unaware that they are infected.
Public health advocates said Monday that Truvada represents a major breakthrough both as a medical treatment and as a means of expanding other preventive measures. Patients who get a prescription for Truvada will be expected to take part in a comprehensive HIV prevention plan, which experts say will enhance the drug's impact.
"It really marks a new era in HIV prevention because in adding Truvada as a prevention strategy, what comes with it is expanded access to HIV testing, condoms and prevention counseling and support," said James Deluca, vice president of the San Francisco AIDS Foundation.
HIV experts have raised concerns that patients might not use the drug correctly. Dr. Thomas Giordano of Baylor College of Medicine said Monday the drug must be taken every day to be effective, and it would be most effective for a relatively small group of people.
"It's been most effective in people who are at very high risk and are able to take the drug on a regular basis," said Dr. Giordano, who served on the FDA panel that recommended approving the drug. "When you really boil it down, that's going to be a relatively focused population, but it's an important population to treat."
Gilead Sciences has marketed Truvada since 2004 as a treatment for people who already are infected with the virus. The once-a-day pill is a combination of two older HIV drugs, Emtriva and Viread.
Starting in 2010, studies showed that the drug could prevent people from contracting HIV when used as a precautionary measure. A three-year study found that daily doses cut the risk of infection in healthy gay and bisexual men by 42 percent when accompanied by condoms and counseling. Last year, another study found that Truvada reduced infection by 75 percent in heterosexual couples in which one partner was infected with HIV and the other was not.
Because Truvada is on the market to manage HIV, some doctors already prescribe it as a preventive measure. FDA approval will allow Gilead Sciences to formally market the drug for that use, which could dramatically increase prescriptions.
The AIDS Healthcare Foundation asked the FDA to reject the new indication, saying it could give patients a false sense of security and reduce the use of condoms. But FDA scientists said Monday there was no indication from clinical trials that Truvada users were likelier to engage in risky sex.
"What we found was that condom use increased over time and sexually transmitted infections either remained at base-line levels or decreased," said Dr. Debra Birnkrant, FDA's director of antiviral products.
Gilead Sciences said Monday that it would keep the pill at its current price, nearly $14,000 per year. Even at that price, HIV physicians said the drug could be cost-effective if it prevents people from contracting the virus.
"It is expensive, but on the other hand, it's far cheaper than a lifetime of HIV treatment," said Dr. Joel Gallant of Johns Hopkins University School of Medicine.
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