Cigna Group’s pharmacy benefit manager Express Scripts on Tuesday sued the U.S. Federal Trade Commission, alleging that the agency’s July report on the PBM industry was biased and defamatory and asking the court to order the FTC to withdraw the report.

Cigna's Express Scripts, one of the country's largest pharmacy benefit managers, today sued the Federal Trade Commission and its chair, Lina Khan, over what the company asserts was a report filled with false and misleading claims about how pharmacy benefit management firms operate.