The queue of lawsuits challenging the constitutionality of the U.S. Inflation Reduction Act’s (IRA) prescription drug price negotiations continues to grow. Novartis AG is the latest drug company, but probably not the last, to join the line. It filed its challenge in federal court in New Jersey Sept. 1, a few days after the Centers for Medicare & Medicaid Services included the company’s heart failure drug, Entresto (sacubitril and valsartan), on its list of the 10 drugs subject to the first round of IRA negotiations.