The U.S. Department of Justice has sued Walgreens for knowingly filling millions of unlawful opioid prescriptions since 2012, alleging systematic pressure on pharmacists to prioritize speed over accuracy. The lawsuit claims that Walgreens regularly ignored red flags indicating the illegality of these prescriptions, leading to dangerous quantities of opioids being dispensed. The chain's staffing policies allegedly prevented pharmacists from fulfilling their professional responsibilities. Walgreens disputes these claims and is seeking judicial clarification on pharmacy responsibilities while emphasizing its commitment to legitimate practices.