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- W2063485471 abstract "Drug craving, the desire to re-experience the effects of a psychoactive substance, may be an important influence on drug-seeking and drug-taking behaviour. In rats, drug-seeking behaviour can be operationalized as conditioned anticipatory behaviour, evidenced by frequent visits to, and an increased time spent and distance travelled in, the drug administration area prior to the availability of the reinforcer. The effects of the opioid antagonist, naltrexone, and its derivatives, nalmefene and naltrindole, on conditioned anticipatory behaviour and drinking-associated behaviour and fluid intake during the access phase were examined. Male Wistar rats were trained to consume 0.1% saccharin and water in a distinct environment in a free-choice limited-access procedure. Naltrexone (0.3, 1 mg/kg) decreased conditioned anticipatory behaviour and drinking-associated behaviour in the saccharin zone without affecting the corresponding behaviour in the water zone. Its derivatives had different effects. Nalmefene (0.1 mg/kg) increased drinking-associated behaviour but not conditioned anticipatory behaviour, whereas naltrindole (1, 2 mg/kg) modestly decreased conditioned anticipatory behaviour but not drinking-associated behaviour. Naltrexone (0.3, 1 mg/kg) and naltrindole (1, 2 mg/kg), but not nalmefene, selectively decreased saccharin intake. These findings suggest that the blockade of selective opioid receptors may differentially alter conditioned anticipatory behaviour, drinking-associated behaviour and consumption levels, and that these behaviours can be modified separately." @default.
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- W2063485471 date "1997-12-01" @default.
- W2063485471 modified "2023-10-16" @default.
- W2063485471 title "Effect of naltrexone and its derivatives, nalmefene and naltrindole, on conditioned anticipatory behaviour and saccharin intake in rats" @default.
- W2063485471 doi "https://doi.org/10.1097/00008877-199712000-00008" @default.
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