Abstract
The antagonism of hypothermia induced by two doses of apomorphine (1 or 16 mg/kg) is proposed as an improved screening test for both neuroleptics and antidepressants.
Low dose apomorphine-induced hypothermia (1 mg/kg) differentiates sulpiride-like neuroleptics (which better antagonize this effect of apomorphine than other effects such as stereotyped behavior) from haloperidol-like drugs. The latter equally antagonize the two effects of apomorphine. The effects of sulpiride are also distinct from those of chlorpromazine-like drugs which strongly antagonize stereotyped behavior, but not hypothermia induced by apomorphine.
Hypothermia induced by a high dose of apomorphine (16 mg/kg) is not antagonized by neuroleptics, but is strongly antagonized by antidepressants (imipramine-like drugs, amineptine, amoxapine, nomifensine, viloxazine) and potential antidepressants (beta-adrenergic stimulants).
The use of these two tests rapidly screens both antidepressants and neuroleptics and classifies neuroleptics according to their profile of action on the dopaminergic system.
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Puech, A.J., Chermat, R., Poncelet, M. et al. Antagonism of hypothermia and behavioral response to apomorphine: A simple, rapid and discriminating test for screening antidepressants and neuroleptics. Psychopharmacology 75, 84–91 (1981). https://doi.org/10.1007/BF00433508
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DOI: https://doi.org/10.1007/BF00433508