The top legal official in Texas Ken Paxton is suing the makers of acetaminophen, claiming the corporations hid safety concerns that the pain reliever posed to children's brain development.
The lawsuit arrives four weeks after Donald Trump publicized an unsubstantiated connection between consuming Tylenol - referred to as acetaminophen - during pregnancy and autism spectrum disorder in children.
Paxton is suing the pharmaceutical giant, which previously sold the medication, the exclusive pain medication recommended for expectant mothers, and Kenvue, which presently makes it.
In a declaration, he said they "misled consumers by making money from discomfort and pushing pills ignoring the dangers."
The company states there is insufficient reliable data connecting Tylenol to autism.
"These manufacturers misled for generations, knowingly endangering millions to line their pockets," Paxton, from the Republican party, said.
The company said in a statement that it was "very worried by the perpetuation of misinformation on the safety of paracetamol and the likely effects that could have on the well-being of women and children in America."
On its website, Kenvue also stated it had "consistently assessed the applicable studies and there is no credible data that shows a verified association between using paracetamol and autism."
Associations speaking for doctors and medical practitioners share this view.
The leading OB-GYN organization has declared paracetamol - the main ingredient in acetaminophen - is among limited choices for women during pregnancy to manage pain and elevated temperature, which can present significant medical dangers if left untreated.
"In over twenty years of investigation on the utilization of paracetamol in pregnancy, not a single reputable study has successfully concluded that the consumption of acetaminophen in any stage of pregnancy results in neurological conditions in children," the organization stated.
The court filing references recent announcements from the Trump administration in claiming the drug is allegedly unsafe.
Recently, Trump raised alarms from health experts when he told women during pregnancy to "fight like hell" not to use acetaminophen when ill.
Federal regulators then issued a notice that medical professionals should think about restricting the consumption of Tylenol, while also mentioning that "a causal relationship" between the drug and autism in young ones has not been proven.
Health Secretary Robert F Kennedy Jr, who oversees the FDA, had pledged in spring to conduct "comprehensive study program" that would establish the source of autism spectrum disorder in a matter of months.
But authorities warned that finding a sole reason of autism - thought by researchers to be the result of a intricate combination of inherited and environmental factors - would be difficult.
Autism is a type of lifelong neurodivergence and condition that affects how individuals experience and engage with the surroundings, and is identified using physician assessments.
In his legal document, the attorney general - aligned with the former president who is campaigning for the Senate - alleges Kenvue and J&J "deliberately disregarded and tried to quiet the evidence" around acetaminophen and autism spectrum disorder.
This legal action seeks to make the corporations "remove any marketing or advertising" that claims Tylenol is secure for expectant mothers.
The court case mirrors the concerns of a group of mothers and fathers of young ones with autism spectrum disorder and attention deficit hyperactivity disorder who sued the producers of acetaminophen in 2022.
The court threw out the lawsuit, saying studies from the plaintiffs' authorities was inconclusive.
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