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Interactions between naloxone and chlorpromazine on behavior under schedule control

โœ Scribed by D. E. McMillan


Publisher
Springer
Year
1971
Tongue
English
Weight
357 KB
Volume
19
Category
Article
ISSN
0033-3158

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โœฆ Synopsis


A multiple fixed-ratio, fixed-interval schedule of food presentation was used to study interactions between naloxone and chlorpromazine in the pigeon. Inactive doses of both drugs could combine to decrease the rate of responding under both schedule components. Inactive doses of naloxone could enhance the rate-decreasing effects of chlorpromazine and inactive doses of ehlorpromazine could enhance the rate-decreasing effects of naloxone. When both drugs decreased the rate, the combined effects of the drugs was greater than the sum of the ratedecreasing effects of the individual drugs. These data suggest that the rate-decreasing effects of naloxone and chtorpromazine are synergistic.


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Schedule-controlled responding was maintained under a fixed-ratio schedule in mice. Administered alone, clonidine, morphine and naloxone produced dose-related decreases in rates of responding, with clonidine about 100 times more potent than morphine which was about ten times more potent than naloxon