$WBA -9% (after-hours) [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.

$WBA since August 2012 filled prescriptions that lacked a legitimate medical purpose, were invalid or weren't issued in professional practice, the DOJ said Friday. 

These prescriptions included excessive quantities and  early refills of opioids, as well as the "trinity," a drug composed of an opioid, a benzodiazepine and a muscle relaxant, according to the complaint.

"We are asking the court to clarify the responsibilities of pharmacies and pharmacists and to protect against the government's attempt to enforce arbitrary rules that do not appear in any law or regulation and never went through any official rulemaking process," said $WBA] https://t.co/EpS6lAHwaD