WASHINGTON 鈥 The US government on Monday sued Rite Aid Corp., accusing the pharmacy chain of missing 鈥渞ed flags鈥 as it illegally filled hundreds of thousands of prescriptions for controlled substances, including opioids.

In a complaint filed in Cleveland federal court, the Department of Justice said Rite Aid repeatedly filled prescriptions from May 2014 to June 2019 that were medically unnecessary, for off-label use, or not issued in the usual course of professional practice.

鈥淭he Justice department is using every tool at our disposal to confront the opioid epidemic that is killing Americans and shattering communities across the country,鈥 Attorney General Merrick Garland said in a statement.

Rite Aid pharmacists were accused of ignoring obvious signs of misuse, including in prescriptions for 鈥渢rinities,鈥 a combination of opioids, benzodiazepine and muscle relaxants preferred by drug abusers for their increased euphoric effect.

The Justice department also said Rite Aid intentionally deleted some pharmacists鈥 internal warnings about suspicious prescribers, such as 鈥渃ash only pill mill???鈥 while admonishing them to 鈥渂e mindful of everything that is put in writing.鈥

鈥淭hese practices opened the floodgates for millions of opioid pills and other controlled substances to flow illegally out of Rite Aid鈥檚 stores,鈥 Associate Attorney General Vanita Gupta said.

Rite Aid is one of the country鈥檚 largest pharmacy chains, with more than 2,330 stores in 17 US states. It did not immediately respond to requests for comment.

The Justice department accused Rite Aid of violating the federal False Claims Act by submitting false prescription claims to government healthcare programs such as Medicare and Medicaid.聽

It joined a whistleblower lawsuit filed in 2019 by two pharmacists and a pharmacy technician from Rite Aid stores in Pennsylvania, North Carolina and West Virginia.

The Justice department occasionally joins whistleblower cases it considers stronger.

It has also sued Walmart, Inc. and drug distributor AmerisourceBergen Corp. over their alleged roles in the nation鈥檚 opioid crisis.

More than 500,000 people died from drug overdoses in the United States from 1999 to 2020, including more than 90,000 in 2020 alone, according to the US Centers for Disease Control and Prevention. 鈥 Reuters