In a civil complaint filed yesterday in the U.S. District Court for the Northern District of Illinois, the Justice Department alleges that Walgreens Boots Alliance, Walgreen Co. and various subsidiaries (collectively, Walgreens) dispensed millions of unlawful prescriptions in violation of the Controlled Substances Act (CSA) and then sought reimbursement for many of these prescriptions from various federal health care programs in violation the False Claims Act (FCA). Walgreens is one of the country’s largest pharmacy chains, with over 8,000 pharmacies across the United States.