Opioid receptors and their ligands produce powerful analgesia that is effective in perioperative period and chronic pain managements accompanied with various side effects including respiratory depression, constipation and addiction etc. Opioids can also interfere with the immune system, not only participating in the function of the immune cells, but also modulating innate and acquired immune re...

Fear and emotional learning are modulated by endogenous opioids but the cellular basis for this is unknown. The intercalated cells (ITCs) gate amygdala output and thus regulate the fear response. Here we find endogenous opioids are released by synaptic stimulation to act via two distinct mechanisms within the main ITC cluster. Endogenously released opioids inhibit glutamate release through the ...

Opioids are among the oldest therapies in our armamentarium, and clinicians recognize their universal utility to limit human distress from pain. Opioids enjoy widespread use as potent analgesics, even though they are abused because of their psychoactive properties. Although the therapeutic and toxic doses are difficult to predict because of the development of tolerance with chronic use, the pri...

Anaesthetists, using basic scientific concepts of peripheral opioid activity, try to improve regional anaesthesia and postoperative analgesia by injecting opioids, with or without local anaesthetic, close to nerve trunks or nerve endings. To test the evidence that peripherally applied opioids (all except intra-articular) have an analgesic effect outside the knee joint. Systematic search for pub...

BACKGROUND In May 2010, a new Canadian guideline on prescribing opioids for chronic noncancer pain (CNCP) was released. To assess changes in family physicians' (FPs) prescribing of opioids following the release of the guideline, it is necessary to know their practices before the guideline was widely disseminated. OBJECTIVES To determine FPs' practices and knowledge in prescribing opioids for ...

BACKGROUND In abdominal wall reconstruction, adequate pain control and minimization of narcotic consumption are essential to improving patient outcomes and satisfaction. Previous studies have examined the role of individual strategies, such as neuraxial analgesia and multimodal analgesia. However, there has not been a study that examined all potential determinants of postoperative narcotic requ...