Ken Paxton, the Republican attorney general of Texas, sued the makers of Tylenol on Tuesday, claiming that the companies hid the risks of the drug on brain development in children.

The lawsuit is the latest fallout from President Donald Trump’s claim last month that use of Tylenol during pregnancy can cause autism. That link is unproven.

Paxton filed the suit against Johnson & Johnson, which sold Tylenol for decades, and Kenvue, a spinoff company that has sold the drug since 2023.

The Texas lawsuit claims that the companies knowingly withheld evidence from consumers about Tylenol’s links to autism and attention deficit hyperactivity disorder. The suit also claims that Kenvue was created to shield Johnson & Johnson from liability over Tylenol.

This lawsuit is the first by a state that s

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