Tylenol in Pregnancy Doubles Risk of Autism

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STORY AT-A-GLANCE

  • Abnormal hormonal exposures in pregnancy can influence fetal brain development, and research published in 2014 warned acetaminophen is in fact a hormone disruptor
  • According to that 2014 study, use of acetaminophen during pregnancy was associated with a 37% increased risk of the child being diagnosed with hyperkinetic disorder, a severe form of attention deficit hyperactivity disorder (ADHD)
  • A 2019 study found that, compared to children of mothers with the lowest acetaminophen burden, children of mothers with the greatest exposure had a 286% higher risk for ADHD and a 362% higher risk for autism spectrum disorder (ASD) by the time they were about 9 years old
  • Findings published in 2016 revealed use of acetaminophen at 18 and 32 weeks of pregnancy were associated with a 42% higher risk of conduct problems and a 31% higher risk of hyperactivity symptoms in the child
  • Another 2016 investigation found children of both sexes whose mothers used acetaminophen during pregnancy were 41% more likely to present with ADHD symptoms at age 5. Boys were also more likely to have ASD

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