title: Effect of cyclic AMP on morphine analgesia tolerance and physical dependence.
mesh_terms: D000698:Analgesia; D000818:Animals; D000242:Cyclic AMP / Q000008:administration & dosage / Q000494:pharmacology*; D004361:Drug Tolerance / Q000187:drug effects*; D006801:Humans; D008297:Male; D051379:Mice; D008815:Mice, Inbred Strains; D009020:Morphine / Q000008:administration & dosage / Q000037:antagonists & inhibitors*; D009021:Morphine Dependence; D009270:Naloxone; D013375:Substance Withdrawal Syndrome / Q000139:chemically induced; D013806:Theophylline / Q000494:pharmacology
chemical_list: D009270:Naloxone; D009020:Morphine; D013806:Theophylline; D000242:Cyclic AMP