Regulation & law · 25/07/2008Updated: 10/17/2026 · 1 min read
DEA Finalizes Rule on Chemical Precursor Used in Fentanyl Manufacture
Summary
The Drug Enforcement Administration (DEA) has finalized a rule controlling the chemical N-phenethyl-4-piperidone (NPP), a precursor used in the illicit manufacture of fentanyl, under the Controlled Substances Act, following a 2007 Interim Rule with no public comments.