Ohio is fighting back against one of the nation's biggest PBMs

Ohio Attorney General Dave Yost has formally demanded that OptumRx, one of the country's largest pharmacy benefit managers, pay back $16 million in "overcharges" related to handling drug benefits for a state agency.

Why it matters: This isn't a lot of money in the grand scheme of things, but it's a forceful step that shows states are actively looking to claw back money from a PBM if they think the company is skimming too much profit from the drug pricing process.

Go deeper: States are the new battleground for drug middlemen