Mealey's (February 21, 2023, 3:12 PM EST) -- NEW ORLEANS — In its opening brief before the Fifth Circuit U.S. Court of Appeals, a group of physicians argues that a Texas federal court erred in ruling that the Food and Drug Administration had sovereign immunity from lawsuit for its public pronouncements concerning the use of ivermectin for the treatment or prevention of COVID-19, which the physicians contend constitutes improper interference of their practice of medicine in violation of the federal Food, Drug, and Cosmetic Act....