Opiate receptor upregulation and functional supersensitivity.
D000818:Animals; D001345:Autoradiography; D001923:Brain Chemistry / Q000187:drug effects*; D002540:Cerebral Cortex / Q000378:metabolism; D003342:Corpus Striatum / Q000378:metabolism; D004744:Enkephalin, Methionine / Q000378:metabolism; D007031:Hypothalamus / Q000378:metabolism; D009271:Naltrexone / Q000494:pharmacology; D009294:Narcotics / Q000494:pharmacology*; D009714:Nucleus Accumbens / Q000378:metabolism; D010487:Periaqueductal Gray / Q000378:metabolism; D051381:Rats; D011957:Receptors, Opioid / Q000187:drug effects*; D013787:Thalamic Nuclei / Q000378:metabolism; D013997:Time Factors
D009294:Narcotics; D011957:Receptors, Opioid; D004744:Enkephalin, Methionine; D009271:Naltrexone