[JURIST] The US Supreme Court [official website] on Thursday voted 5-4 to reverse [opinion, PDF] the lower court in PLIVA, Inc. v. Mensing [Cornell LII backgrounder; JURIST report], holding that since generic drugs and their warnings are managed by the Food and Drug Administration (FDA) [official website], their federal regulations on warning labels preempt state law on warning labels. Justice Clarence Thomas delivered the opinion of the court, except for Part III-B-2, which only Chief Justice John Roberts, Justice Samuel…