Walgreens, one of the nation’s largest pharmacy chains, knowingly filled millions of unlawful controlled substance prescriptions. These unlawful prescriptions included prescriptions for excessive quantities of opioids, opioid prescriptions filled significantly early, and prescriptions for the especially dangerous and abused combination of three drugs known as a “trinity.” Walgreens pharmacists allegedly filled these prescriptions despite clear red flags indicating a high likelihood that the prescriptions were invalid because they lacked a legitimate medical purpose or were not issued in the usual course of professional practice. The settlement was for $300 million.