Kirkland & Ellis and Hogan Lovells have filed a lawsuit alleging President Joe Biden’s secretary of Health and Human Services unlawfully rejected Eli Lilly’s alternative plan for making drugs more affordable to low-income and uninsured patients.

The manufacturer of Mounjaro, Trulicity and other treatments for weight loss or diabetes accuses the U.S. Department of Health and Human Services of banning Big Pharma from implementing a cash replenishment rebate program in violation of the Administrative Procedure Act.