Schedules of Controlled Substances: Placement of Serdexmethylphenidate in Schedule IV Posted on July 5, 2022July 7, 2022 By sdargoltz DEA; June 24, 2022 Access article Chemistry, Crime Scene Investigation and Reconstruction, DREs / Traffic Safety Resource Prosecutors, Forensic Pathology and Medicolegal Death Investigation, Seized Drugs/Controlled Substances, Toxicology Tags:DEA