President Donald Trump on Sept. 22 announced a government effort tying acetaminophen (Tylenol) use during pregnancy to autism and other neurodevelopmental conditions and urged people to avoid the drug.

The announcement — which also promoted the vitamin derivative leucovorin as a possible treatment for some autism symptoms and questioned childhood vaccine schedules — drew immediate pushback from major medical groups and autism researchers.

What the White House said

The U.S. Department of Health and Human Services and the Food and Drug Administration said recent studies show an association between prenatal acetaminophen exposure and later diagnoses of autism or ADHD, and the FDA said it has begun the process to change acetaminophen labeling and notified clinicians of the evidence.

In the

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