title: The effects of chronic morphine treatment on histamine concentration and histidine decarboxylase activity in rat brain.
mesh_terms: D000818:Animals; D001921:Brain / Q000187:drug effects / Q000201:enzymology; D001923:Brain Chemistry / Q000187:drug effects*; D002262:Carboxy-Lyases / Q000378:metabolism*; D006632:Histamine / Q000032:analysis*; D006640:Histidine Decarboxylase / Q000378:metabolism*; D006801:Humans; D008297:Male; D009020:Morphine / Q000494:pharmacology*; D051381:Rats; D013375:Substance Withdrawal Syndrome / Q000378:metabolism
chemical_list: D009020:Morphine; D006632:Histamine; D002262:Carboxy-Lyases; D006640:Histidine Decarboxylase