The president and Health Secretary Robert F. Kennedy Jr. also broadened access to a treatment they said could fight autism symptoms.

His remarks also spurred doctors to warn that they could prompt pregnant women to avoid acetaminophen in situations where it’s warranted and clinically advisable.

President Donald Trump boasted that his administration may have discovered the “answer to autism” in a link to the use of acetaminophen by pregnant mothers — but such a link is not the “holy grail” and requires more research,