Levacetylmethadol (INN), levomethadyl acetate (USAN), OrLAAM (trade name) or levo-α-acetylmethadol (LAAM) is a synthetic opioid similar in structure to methadone. It has a long duration of action due to its active metabolites. It was approved in 1993 by the U.S. Food and Drug Administration for use in the treatment of opioid dependence. In 2001, levacetylmethadol was removed from the European market due to reports of life-threatening ventricular rhythm disorders. In 2003, Roxane Laboratories, Inc. discontinued Orlaam in the US.

CAS：43033-72-3
中文别名：
英文别名：Levomethadyl acetate hydrochloride;
分子式：C23H32ClNO2
分子量：389.959
精确质量：389.212
Psa：29.54
Logp：5.4566

UNII：B54CW5KG52

沸点：456ºC at 760 mmHg
闪点：130ºC
储存条件：库房通风低温干燥

海关编码：2922199090