Alphacetylmethadol

Alphacetylmethadol, or α-acetylmethadol, is a synthetic opioid analgesic. Its levorotary enantiomer, levacetylmethadol, is an FDA-approved treatment for opioid addiction; however as of 2003 it is no longer used in the United States for this purpose. Alphacetylmethadol is very similar in structure to methadone, a widely prescribed treatment for opioid addiction. In the United States, it is a Schedule I controlled substance under the Controlled Substances Act, with an ACSCN of 9603 and a 2013 annual manufacturing quota of 2 grammes.