Opioid overdoseAn opioid overdose is toxicity due to excessive consumption of opioids, such as morphine, codeine, heroin, fentanyl, tramadol, and methadone. This preventable pathology can be fatal if it leads to respiratory depression, a lethal condition that can cause hypoxia from slow and shallow breathing. Other symptoms include small pupils (with the exception of pethidine, where there may be dilated pupils), and unconsciousness, however its onset can depend on the method of ingestion, the dosage and individual risk factors.
Opioid antagonistAn opioid antagonist, or opioid receptor antagonist, is a receptor antagonist that acts on one or more of the opioid receptors. Naloxone and naltrexone are commonly used opioid antagonist drugs which are competitive antagonists that bind to the opioid receptors with higher affinity than agonists but do not activate the receptors. This effectively blocks the receptor, preventing the body from responding to opioids and endorphins.
RémifentanilLe rémifentanil est un opioïde qui possède une action analgésique ultra-courte. Il est utilisé uniquement en anesthésie et en réanimation. Il est commercialisé sous forme de chlorhydrate de rémifentanil (Ultiva). Sa durée d'action extrêmement brève, qui en fait un agent de choix pour l'anesthésie de courte durée, impose de l'administrer en perfusion intraveineuse continue à la seringue électrique. Il permet d'autre part de réaliser des anesthésies générales balancées faiblement dosées en hypnotiques. Catég
Κ-opioid receptorThe κ-opioid receptor or kappa opioid receptor, abbreviated KOR or KOP for its ligand ketazocine, is a G protein-coupled receptor that in humans is encoded by the OPRK1 gene. The KOR is coupled to the G protein Gi/G0 and is one of four related receptors that bind opioid-like compounds in the brain and are responsible for mediating the effects of these compounds. These effects include altering nociception, consciousness, motor control, and mood. Dysregulation of this receptor system has been implicated in alcohol and drug addiction.
