DEERFIELD, Ill. (AP) — The U.S. Justice Department is accusing Walgreens of filling millions of prescriptions in the last decade and more without a legitimate purpose, including for dangerous amounts of opioids, according to a lawsuit filed this week.

The U.S. Justice Department said on Friday it has filed a lawsuit alleging that pharmacy chain operator Walgreens knowingly filled millions of prescriptions that lacked a legitimate medical purpose.

A West Side Walgreens at 2340 W. Madison St. Pat Nabong/Sun-Times file Share The U.S. Department of Justice has sued Deerfield-based Walgreens, saying the drugstore chain’s pharmacists filled “unlawful” prescriptions for opioids and other controlled substances that helped fuel the country’s prescription painkiller crisis.