The effect of acute and chronic morphine administration on brain acetylcholine levels in the rat.
D000109:Acetylcholine / Q000032:analysis*; D000818:Animals; D001923:Brain Chemistry / Q000187:drug effects*; D009020:Morphine / Q000494:pharmacology*; D009269:Nalorphine / Q000494:pharmacology; D010830:Physostigmine / Q000494:pharmacology; D051381:Rats
D009020:Morphine; D010830:Physostigmine; D000109:Acetylcholine; D009269:Nalorphine