Texas Attorney General (AG) Ken Paxton has sued Pfizer and its supplier Tris Pharma accusing them of providing adulterated Quillivant XR to attention-deficit/hyperactivity disorder (ADHD) children under the state’s Medicaid low-income insurance programme.

In the complaint, filed in Harrison County, Texas District Court, Paxton accused Pfizer and Tris Pharma of manipulating quality-control testing for Quillivant XR between 2012 and 2018.

According to the lawsuit, both firms used deficient manufacturing practices to get passing results from tests that were mandated to be done under federal law.

Furthermore, the AG claimed that properly conducted testing revealed that the medicine did not dissolve as it should have, indicating that it would not be distributed in the body as anticipated, reported Reuters.

The lawsuit further claimed that Pfizer convinced Texas’ Medicaid programme to include Quillivant on its list of recommended medications despite its knowledge of the quality-control problems.

In a statement, Paxton said: “I am horrified by the dishonesty we uncovered in this investigation.”

Several families in Texas reportedly complained to Paxton about Quillivant’s lack of productivity, according to the news agency.

In addition, the complaint accused the American pharmaceutical major and its supplier of defrauding the Medicaid programme and seeks unspecified monetary damages from the firms.

Quillivant was originally developed by Nextwave Pharmaceuticals, which was acquired by Pfizer in 2012.