This document is a court case summary from the United States Court of Appeals for the Eighth Circuit regarding a failure to warn lawsuit brought by Gladys Mensing against generic drug manufacturers of metoclopramide (Reglan). The district court had dismissed Mensing's claims against the generic manufacturers based on federal preemption and against the brand name manufacturers because she did not ingest their product. The appellate court is reviewing these decisions. It provides background on federal drug regulations for brand and generic drugs and how drug labels can be changed, before analyzing whether federal law preempts failure to warn claims against generic manufacturers.