Highlights ► This paper is the 33rd annual review of research on the endogenous opioid system. ► It summarizes 2010 behavioral, molecular and pharmacological opioid papers. ► Topics include opioid analgesic, stress, tolerance and dependence effects. ► Topics also include learning, ingestion, alcohol and drugs of abuse. ► Topics also examine sex, mental illness, and neurologic disorders.
/lp/elsevier/endogenous-opiates-and-behavior-2010-7IShbGApuw