UnitedHealth Group's pharmacy benefit manager, OptumRx, has been found to have overcharged cancer patients for drugs by over 1,000%, according to a report by the Federal Trade Commission. The report also found that OptumRx, along with its peers Express Scripts and CVS Caremark Rx, collectively pocketed $7.3 billion in added revenue above cost over a five-year period. The markup rates applied to numerous specialty generic drugs, including those used to treat leukemia and HIV. The findings have sparked criticism of the US healthcare system and the role of pharmacy benefit managers in driving up costs.