President Donald Trump and RFK Jr. urged pregnant women to avoid Tylenol in a Sept. 22 news conference, but why Tylenol and why do they want women to avoid it?

Trump and his Health and Human Services Secretary Robert F. Kennedy Jr. warned pregnant women to avoid taking Tylenol and other drugs with high amounts of its active ingredient, acetaminophen, claiming it was linked to a rise in autism in children, USA Today previously reported .

"Fight like hell not to take it," Trump said during the news conference.

President Trump said the Food and Drug Administration would start advising physicians of the risk to pregnant women and children.

What is acetaminophen?

Acetaminophen is the active ingredient in pain relief medicine like Tylenol. The name brand is not the only over-the-counter d

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