WASHINGTON, Oct. 9 -- The U.S. Department of Commerce's National Institute of Standards & Technology issued the following press release:

Public health officials and law enforcement agents are facing a growing challenge in combating the fentanyl epidemic: They lack detailed and timely information on the harmful and potentially deadly substances, including anesthetics, industrial chemicals, veterinary sedatives and other adulterants, that drug suppliers increasingly mix into the illicit fentanyl supply.Now, a new study from the National Institute of Standards and Technology (NIST) reveals how the prevalence of these adulterants changes over time and across different regions of the country. NIST chemist Edward Sisco and his colleagues base th...