Cigna subsidiary Express Scripts Inc. sued the Federal Trade Commission for defamation Tuesday, claiming FTC’s report that pharmacy benefit managers have driven up prescription drug costs is false and misleading.

The company has called on the U.S. District Court for the Eastern District of Missouri to order the FTC and its chair, Lina Khan, to remove the report. Express Scripts maintains in the complaint that the report is “unfair, biased, erroneous and defamatory.”