Big Pharmacy Chains Also Fed the Opioid Epidemic, Court Filing Says. Drugstores, Drugs (Pharmaceuticals), Opioids and Opiates, Suits and Litigation (Civil), OxyContin (Drug), CVS Caremark Corporation, Purdue Pharma, Rite Aid Corporation, Walgreen Co., Walmart Stores Inc, Trumbull County (Ohio), Lake County (Ohio), your-feed-science