title: Possible role of cyclic AMP and dopamine in morphine tolerance and physical dependence.
mesh_terms: D000818:Animals; D001921:Brain / Q000187:drug effects*; D002531:Cerebellum / Q000187:drug effects / Q000378:metabolism; D003342:Corpus Striatum / Q000187:drug effects / Q000378:metabolism; D000242:Cyclic AMP / Q000378:metabolism*; D004298:Dopamine / Q000378:metabolism*; D004361:Drug Tolerance; D006801:Humans; D008297:Male; D008636:Mesencephalon / Q000187:drug effects; D008872:Microwaves; D009020:Morphine / Q000008:administration & dosage / Q000494:pharmacology*; D009270:Naloxone / Q000494:pharmacology; D009638:Norepinephrine / Q000378:metabolism; D051381:Rats; D013375:Substance Withdrawal Syndrome; D019966:Substance-Related Disorders / Q000378:metabolism*
chemical_list: D009270:Naloxone; D009020:Morphine; D000242:Cyclic AMP; D004298:Dopamine; D009638:Norepinephrine