sentences:  Other criticisms presented in the 1996 "60 Minutes" special of the Searle studies included assertions of unreported medical treatments that may have affected the study outcomes and discrepancies in the reported data.Schmidt agreed, pending an investigation into alleged improprieties in safety studies for aspartame and several drugs.In December 1975, the FDA placed a stay on the aspartame approval, preventing Searle from marketing aspartame.