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  • Title: [Acute and chronic effects of carpipramine, clozapine, haloperidol and sulpiride on the metabolism of biogenic amines in the rat brain (author's transl)].
    Author: von Stralendorff B, Ackenheil M, Zimmermann J.
    Journal: Arzneimittelforschung; 1976; 26(6):1096-8. PubMed ID: 9108.
    Abstract:
    In acute and chronic experiments investigations were made concerning the effect of clozapine, haloperidol, sulpiride and carpipramine on MHPG, HVA and 5-HIAA in rat brain and on motor activity of the animals. The activity of the rats treated with clozapine and haloperidol was reduced on the first day. After 10 days of treatment this effected of clozapine was significantly diminished. The MHPG level increased slightly on the first day of treatment with all four drugs. This elevation was maintained after chronic treatment with carpipramine and sulpiride, whereas clozapine and haloperidol decreased the MHPG content. 5-HIAA values did not show significant changes in acute experiments, whereas in chronic ones there was an increase. Haloperidol and clozapine induced a strong increase of HVA which decreased after 11 days in those animals treated with haloperidol. In comparison to haloperidol, after clozapine application the percentage of HVA-increase was higher in the limbic system than in the nigrostriatum.
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