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Study finds pregnancy nausea drug won’t harm fetus

There’s reassuring news for pregnant women miserable with morning sickness: A very large study in Denmark finds no evidence that using a popular antinausea drug will harm their babies.

One in 10 pregnant women has nausea and vomiting bad enough to need medicine, but many forgo it out of fear of side effects. No drugs are currently approved for morning sickness in the United States although doctors are free to prescribe whatever they believe is best.

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Zofran, sold by Glaxo­SmithKline and in generic form for treating nausea from cancer treatments and other causes, has been the top choice. Yet women and doctors have been leery of it because a small study previously suggested it might raise the risk of a birth defect — cleft palate.

The new study of more than 600,000 pregnancies in Denmark found no evidence of major birth-related problems, so women should not be afraid to use Zofran if they need it, said Dr. Iffath Hoskins, a high-risk pregnancy specialist at NYU Langone Medical Center and a spokeswoman for the American College of Obstetricians and Gynecologists.

‘‘It’s effective and it’s safe,’’ she said. ‘‘Nobody is giving you a gold star for suffering through this.’’

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