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Certain UTI Medications May Raise Risk Of Birth Defects, Officials Warn | Fort Smith/Fayetteville News


(CBS News) — Urinary tract infections (UTIs) can be problematic for pregnant women and their babies, but so can two antibiotics used to treat these infections, U.S. health officials warn.

The antibiotics — trimethoprim-sulfamethoxazole (Bactrim) and nitrofurantoin (Macrobid) — have been linked to a small risk for birth defects in pregnant women when given in the first trimester.

Despite the risk, many pregnant women are still getting these antibiotics, according to a new report from the U.S. Centers for Disease Control and Prevention.

“Birth defects associated with these drugs include heart, brain and facial defects,” said Elizabeth Ailes, a health scientist at the CDC and lead author of the report.

A 3 percent risk of birth defects is associated with all pregnancies, she said. “The increased risks associated with these antibiotics is relatively small, but significant — about two-times,” she said.

About 8 percent of pregnant women develop UTIs.

“It’s important for women to know, despite the small elevation in birth defects risk, treatment is really important because untreated UTIs can have serious consequences for both the mom and the baby,” Ailes said.

Untreated, these infections can lead to babies born at a low birth weight, babies born prematurely and the development of body-wide infections that can be deadly, she said.

Among privately insured women with UTIs, about 40 percent are being prescribed Bactrim or Macrobid, according to Ailes.

If a UTI can be cured only with either of these drugs, however, they need to be used regardless of the small risk, said Dr. Jill Rabin, chief of ambulatory care, obstetrics and gynecology and head of urogynecology at Northwell Health in New Hyde Park, N.Y.

Rabin also said that these antibiotics, like any other drug, should be prescribed at the lowest effective dose.

The American College of Obstetricians and Gynecologists…

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