President Donald Trump is expected to give a Monday afternoon announcement linking the use of popular over-the-counter pain medication Tylenol to the development of autism during pregnancy, a claim which many doctors dispute.

According to researchers, there is no firm evidence of a link between the use of the drug and autism.

Shares of Tylenol manufacturer consumer health company Kenvue were down 5.5% in trading Monday and have lost 17% in September as reports emerged that the administration would link the drug to autism.

Speaking to reporters on Sunday night, the president said that he thinks Tylenol use is “a very big factor” in the rise of autism. The announcement could also link vaccines to the condition, Trump said.

“There’s obviously something artificial that’s really wrong, and

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