This bill, titled the "Stopping Overdoses of Fentanyl Analogues Act" , proposes to amend the Controlled Substances Act by permanently classifying fentanyl-related substances as Schedule I controlled substances. This action would subject these substances to the highest level of federal control, reflecting their high potential for abuse and lack of accepted medical use. The legislation provides a detailed chemical definition for "fentanyl-related substances" , specifying various structural modifications to the fentanyl molecule that would bring a compound under this new classification. Crucially, it also stipulates that these substances will be treated as analogues of fentanyl for penalty purposes, thereby streamlining enforcement by removing the need for case-by-case proof that they meet the general definition of a controlled substance analogue.