A group of doctors is suing the Food and Drug Administration and the Department of Health and Human Services for their various attempts at preventing ivermectin from being prescribed to treat Covid-19. Plaintiffs Robert L. Apter, Mary Talley Bowden, and Paul E. Marik argued the FDA tried to prohibit them from prescribing the drug, even though they have successfully used it in treating patients with the coronavirus. “The FDA generally cannot ban particular uses of human drugs once they are otherwise approved and admitted to the market, even if such use differs from the labeling — commonly referred to as...