Mealey's (January 5, 2022, 5:05 PM EST) -- NEW ORLEANS — The Fifth Circuit U.S. Court of Appeals on Dec. 22 affirmed a trial court’s dismissal of Walmart Inc.’s challenge of federal interpretation of the Controlled Substances Act (CSA) as it relates to the dispensing of opioids, agreeing that the Drug Enforcement Administration (DEA) issued no rule or guidance that created a controversy, that the agency enjoys sovereign immunity and that the retailer’s concerns are already being litigated in a separate civil lawsuit in federal court....