Gilead's new HIV drug shows lower side-effects over longer term

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Drugmaker Gilead Sciences Inc said data from a late-stage study showed that its experimental drug, Genvoya, showed reduced side-effects compared with an older version of the drug in treating HIV-infected patients over a longer term.

The company said Genvoya was as good as Stribild, which is the older version, after 96 weeks of treatment and had lesser side-effects on patients' kidneys and bones.

Genvoya, which is developed from Stribild by replacing one part of the four-drug cocktail, has already received positive opinions from European health regulators.

The company's marketing application in Europe was supported by two late-stage studies that showed the same benefit, but over 48 weeks of treatment.

Stribild raked in sales of $803 million in the first half of the year, according to a regulatory filing from the company.

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Gilead shares were up marginally at $102 premarket. Up to Wednesday's close, the stock had gained about 8 percent this year.