The federal government is suing some big pharmacy benefit managers, or PBMs, over a system of drug rebates that regulators say has made the price of insulin soar for diabetic patients. Three companies that process about 80% of prescriptions in the United States - Caremark,

In January, a new Idaho law will take effect requiring reform of business practices by pharmacy middlemen — in search of tamping down prescription drug costs. The new law targets pharmacy benefit managers,

Express Scripts, one of the largest pharmacy benefit managers in the U.S., filed a lawsuit demanding that a recent FTC report on industry middlemen be vacated.