The federal courthouse in Sioux Falls. (John Hult/South Dakota Searchlight)
A drugmaker is suing South Dakota over a law that bars the company from limiting drug discounts used to prop up providers who serve Medicaid patients.
The lawsuit is from Chicago-based AbbVie Inc., which sells the wrinkle-remover Botox and the arthritis drug Humira, among other products. The litigation challenges the legality of a bill signed into law by South Dakota Gov. Larry Rhoden on March 11…