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The Trump administration on Monday drew an unproven link between autism and pregnant women’s use of acetaminophen, the active ingredient in one of the world’s most common over-the-counter pain relievers, Kenvue

’s Tylenol.

President Donald Trump said the Food and Drug Administration will issue a physician’s notice about the risk of patients using acetaminophen during pregnancy unless they have a fever. The agency will also start the process of changing the safety label for acetaminophen on Tylenol and similar products.

The moves clash with a bulk of scientific literature suggesting no causal link between autism and exposure to acetaminophen in the womb.