A lawsuit filed Monday accused three makers of insulin of conspiring to drive up the prices of their lifesaving drugs, harming patients who were being asked to pay for a growing share of their drug bills.
The price of insulin has skyrocketed in recent years, with the three manufacturers — Sanofi, Novo Nordisk and Eli Lilly — raising the list prices of their products in near lock step, prompting outcry from patient groups and doctors who have pointed out that the rising prices appear to have little to do with increased production costs.