Behavioural analysis of the anorectic effects of fluoxetine and fenfluramine.

Abstract:

:Two sets of experiments were carried out to compare the effects of fenfluramine and fluoxetine on consummatory and operant behaviour. In food-deprived rats allowed access to a 35% sucrose solution, an initial period of sucrose consumption was followed by a short period of grooming and exploratory behaviour, later superceded by resting. This "behavioural satiety sequence" was advanced by fluoxetine, but disrupted by dl-fenfluramine, which suppressed post-prandial resting, even at sub-anorectic doses. Fluoxetine also elicited resting behaviour following water drinking. However, this did not appear to be a non-specific sedative effect, since fluoxetine increased post-prandial grooming. In rats performing on random interval schedules of food reinforcement, fluoxetine caused proportionally greater decreases in responding on a reinforcement-lean schedule (RI-300s), as compared to a reinforcement-rich schedule (RI-7.5s); this effect is similar to that of a reduction in level of food deprivation. By contrast, fenfluramine reduced responding equally on both schedules. In both paradigms, the effects of fluoxetine were compatible with an increase in postprandial satiety, but the effects of fenfluramine were not.

journal_title

Psychopharmacology

authors

Willner P,McGuirk J,Phillips G,Muscat R

doi

10.1007/BF02245933

subject

Has Abstract

pub_date

1990-01-01 00:00:00

pages

273-7

issue

2

eissn

0033-3158

issn

1432-2072

journal_volume

102

pub_type

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