Key Takeaways

Federal health officials issued a warning about an unproven link between the active ingredient in Tylenol and autism.

Research on the neurodevelopmental effects of acetaminophen is mixed, and no studies show that acetaminophen causes autism.

Acetaminophen is the only drug considered safe to treat fever and pain during pregnancy. Left untreated, those conditions can cause harm or death for the pregnant person and the fetus.

Acetaminophen, the active ingredient in Tylenol, is the only pain relief and fever-reducing drug considered safe to take during pregnancy. More than half of pregnant people in the United States report using it at least once during their pregnancy.

Top federal health officials are now casting doubt on the safety of acetaminophen, warning that taking t

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