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An opioid overdose results from over-activation of these receptors, which can cause permanent brain damage from cerebral hypoxia or neurotoxicity. [ 33 ] [ 7 ] Mu receptors have an analgesic effect on the brain, and are found in various parts of the nervous system including the cerebral cortex and thalamus . [ 16 ]
It is not expected that these drugs would induce opposing structural changes in the brain because these two classes of drugs, opiates and stimulants, both cause similar behavioral phenotypes. Both of these drugs induce increased locomotor activity acutely, escalated self-administration chronically, and dysphoria when the drug is taken away. [24]
Damage to the CTZ can come via stroke, physical injury, or over-excitation resulting in neuron death. Once the damage has occurred, the effects can cause the emetic response to disappear, or cause the emetic response to heighten, in some cases causing intractable vomiting that leave patients in severe distress.
Long-term opioid use can cause opioid-induced hyperalgesia, which is a condition in which the patient has increased sensitivity to pain. [101] All of the opioids can cause side effects. [70] Common adverse reactions in patients taking opioids for pain relief include nausea and vomiting, drowsiness, itching, dry mouth, dizziness, and constipation.
An animated view of the human κ-opioid receptor in complex with the antagonist JDTic. Opioid receptors are a group of inhibitory G protein-coupled receptors with opioids as ligands. [1] [2] [3] The endogenous opioids are dynorphins, enkephalins, endorphins, endomorphins and nociceptin. The opioid receptors are ~40% identical to somatostatin ...
In 1986, it was presumed that permanent brain damage may result from chronic use of benzodiazepines similar to alcohol-related brain damage. [70] In 1987, 17 inpatient people who used high doses of benzodiazepines non-medically have anecdotally shown enlarged cerebrospinal fluid spaces with associated cerebral atrophy. Cerebral atrophy ...
Complications of overdose can include noncardiogenic pulmonary edema. [2] If death occurs this is typically due to a lack of breathing. [3] Barbiturate overdose may occur by accident or purposefully in an attempt to cause death. [3] The toxic effects are additive to those of alcohol and benzodiazepines. [3]
The majority of drug-related deaths involve misuse of heroin or other opioids in combination with benzodiazepines or other CNS depressant drugs. In most cases of fatal overdose it is likely that lack of opioid tolerance combined with the depressant effects of benzodiazepines is the cause of death.