Abstract
Two tests designed to elicit responses to novelty and to aversive stimuli were used to study the effects of the serenics fluprazine and eltoprazine on the behaviour of male Swiss mice: a free exploratory test (fluprazine; 2.5, 5 and 10 mg/kg; eltoprazine: 2.5, 5, 10 and 15 mg/kg) and a two-box choice procedure (fluprazine: 1.25, 2.5, 5 and 7.5 mg/kg; eltoprazine: 2.5, 5, 7.5 and 10 mg/kg). Both drugs increased the neophobic reaction, as well as the avoidance of a brightly illuminated box. These effects closely resemble those of psychostimulant drugs such as methamphetamine and caffeine. It is hypothesized that the behavioural changes induced by these drugs may be due to a nonspecific increase of the emotional reactivity of animals.
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