Shares of Kenvue Inc. (KVUE), the parent company of Tylenol, are down around 6% in midday trading on Monday on news the Trump administration is expected to link the over-the-counter pain relief medicine to autism.

According to MSNBC, there is growing alarm in the medical community ahead of an expected announcement after Trump told reporters he believed Tylenol was “a very big factor” in autism risk.

Longtime Tylenol maker Johnson & Johnson spun off the Tylenol brand in 2023 to become a standalone publicly traded company, Kenvue, known for such household products as Band-Aid, Listerine, and Zyrtec.

Tylenol, which has been available in some form in the U.S. since 1955 and available for purchase over-the-counter since 1960, is the brand name for acetaminophen, the pill’s active ingredient—

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