Using acetaminophen, brand-name Tylenol, during pregnancy may be tied to attention deficit hyperactivity disorder in children, according to a study from the medical journal JAMA Pediatrics.

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Dr. Devi Nampiaparampil, from the NYU School of Medicine, cautioned that further tests need to be done to tie the drug to ADHD. The study was conducted through phone interviews, so it’s uncertain what other medicines the women may have been taking.

Dr. Nampiaparampil said it’s better to avoid taking the medication during pregnancy. If women are experiencing pain, she suggested they visit a doctor to discuss other options, such as massages or physical therapy.

“If a women has pain during pregnancy and she doesn’t treat it, the problem is that her stress hormones can go up as well and that can also affect the fetus,” she said.

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