Texas Attorney General Paxton is filing a lawsuit against the producers of acetaminophen, asserting the firms withheld safety concerns that the drug created to children's brain development.
The lawsuit arrives thirty days after President Donald Trump promoted an unsubstantiated connection between taking Tylenol - alternatively called acetaminophen - throughout gestation and autism in offspring.
Paxton is suing the pharmaceutical giant, which once produced the medication, the sole analgesic recommended for women during pregnancy, and Kenvue, which currently produces it.
In a official comment, he stated they "misled consumers by profiting off of suffering and marketing drugs regardless of the dangers."
Kenvue says there is lacking scientific proof linking Tylenol to autism.
"These companies lied for decades, knowingly endangering numerous people to increase profits," Paxton, from the Republican party, stated.
The company said in a statement that it was "deeply concerned by the spread of false claims on the security of acetaminophen and the likely effects that could have on the well-being of US mothers and children."
On its online platform, the company also stated it had "consistently assessed the relevant science and there is insufficient valid information that indicates a established connection between using paracetamol and autism spectrum disorder."
Groups representing physicians and medical practitioners share this view.
The leading OB-GYN organization has said acetaminophen - the main ingredient in Tylenol - is among limited choices for expectant mothers to address discomfort and fever, which can create serious health risks if left untreated.
"In multiple decades of investigation on the consumption of acetaminophen in gestation, zero credible investigations has conclusively proven that the usage of paracetamol in any period of pregnancy leads to neurological conditions in young ones," the association stated.
The court filing references current declarations from the Trump administration in arguing the drug is potentially dangerous.
In recent weeks, Trump caused concern from public health officials when he told women during pregnancy to "fight like hell" not to take acetaminophen when ill.
The FDA then released a statement that doctors should think about restricting the usage of Tylenol, while also mentioning that "a proven link" between the drug and autism in children has remains unverified.
The Health Department head RFK Jr, who manages the Food and Drug Administration, had promised in spring to undertake "comprehensive study program" that would identify the origin of autism spectrum disorder in a matter of months.
But specialists cautioned that discovering a single cause of autism - believed by scientists to be the outcome of a complex mix of genetic and environmental factors - would prove challenging.
Autism spectrum disorder is a category of permanent neurological difference and condition that affects how individuals encounter and relate to the surroundings, and is diagnosed using medical professional evaluations.
In his legal document, the attorney general - a Trump ally who is seeking federal office - asserts Kenvue and Johnson & Johnson "intentionally overlooked and tried to quiet the research" around paracetamol and autism.
The case seeks to make the corporations "eliminate any commercial messaging" that asserts Tylenol is safe for pregnant women.
The court case parallels the grievances of a assembly of mothers and fathers of minors with autism and attention deficit hyperactivity disorder who sued the manufacturers of Tylenol in 2022.
A federal judge threw out the case, stating investigations from the parents' expert witnesses was inconclusive.