Cigna's Express Scripts filed a lawsuit Tuesday challenging a federal report that places the blame for rising drug prices on pharmacy benefit managers, describing it as "seventy-four pages of unsupported innuendo" and calling for a retraction.

Express Scripts, one of the country’s largest pharmacy benefit managers, sued the Federal Trade Commission (FTC) Tuesday and demanded the agency retract a report saying the industry middlemen

At issue is a report released by the FTC in July called: “Pharmacy Benefit Managers: The Powerful Middlemen Inflating Drug Costs and Squeezing Main Street Pharmacies.” Express Scripts claims in the lawsuit that the report “is seventy-four pages of unsupported innuendo” leveled against it and other PBMs.