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  • Title: Morphine antagonists and consummatory behaviors.
    Author: Ostrowski NL, Rowland N, Foley TL, Nelson JL, Reid LD.
    Journal: Pharmacol Biochem Behav; 1981 Apr; 14(4):549-59. PubMed ID: 6262844.
    Abstract:
    Opiate antagonists were tested for their effects upon either drinking or eating in eight experiments. Naloxone, nalorphine, and the active isomer of WIN 44,441 all reduce drinking. Neither an analog of nalorphine that does not cross the blood-brain barrier, nor the inactive isomer of WIN 44,441 is effective in reducing water intake. These data provide support for the conclusion that these antagonists ahve stereospecific effects within the central nervous system. Naloxone suppresses drinking following procedures inducing osmotic, volemic, or hormonal thirst. Naloxone suppresses eating following procedures inducing glucoprivation but does not alter eating elicited by tail-pressure. Collectively, these data lead to the conclusion that endorphins play a role in the organization of ingestive behavior following challenges to homeostasis.
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