The US Federal Trade Commission sued CVS Health Corp., Cigna Group, and UnitedHealth Group Inc., accusing their pharmacy benefit managers of illegal rebate programs that inflated insulin prices. The FTC alleges that Caremark, Express Scripts, and Optum Rx accepted drugmakers' money to keep lower-cost insulin off their approved lists, shifting more costs onto patients. The PBMs defend their practices, arguing they protect consumers from rising drug costs, while the FTC aims to lower list prices for insulin and other drugs.