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  • Title: [Evaluation of efficacy and tolerance of amisulpride in treatment of schizophrenic psychoses].
    Author: Chabannes JP, Pelissolo A, Farah S, Gerard D.
    Journal: Encephale; 1998; 24(4):386-92. PubMed ID: 9809244.
    Abstract:
    Amisulpride is a benzamide derivative atypical antipsychotic characterized by selective blockade of dopamine D3 and D2 receptors, limbic selectivity and preferential blockade of dopamine autoreceptors at low doses. Its efficacy on predominant negative symptoms of schizophrenia at low doses, and on the positive symptoms at doses from 400 to 1,200 mg/day has been demonstrated in several controlled studies. The aim of our study was to assess the use in psychiatric clinical practice under naturalistic conditions, efficacy and safety of amisulpride and patient's ability to cope with social skills during a 3-month period of treatment with a follow-up at 6 months. A total of 445 patients (293 men and 152 women), between 18 and 45 years of age, were included in the study DSM III-R criteria of schizophrenia, paranoid type (295.3), or schizophreniform disorder (295.4) were required for inclusion. The patients received amisulpride with flexible dosage between 600 and 1,200 mg/d during a 3-month period (792 mg/d +/- 318). Evaluation was based on the Brief Psychiatric Rating Scale (BPRS), on the Positive And Negative Symptoms Scale (PANSS), and on Clinical Global Improvement scale, completed at D0, D14, D28, D60 and D90. Safety was also assessed with a comprehensive statement of adverse events and with the Simpson-Angus scale of extra pyramidal symptoms. A scale of social adaptation (Echelle d'Adaptation PsychoSociale) was completed at D0, D90 and D180. During the 3-month period of treatment, 124 patients (27.9%) dropped out the trial, including 24 cases of inefficacy and 27 cases of concomitant events. Intent-to-treat analysis showed a significant improvement of BPRS scores (40.2 vs 67.6; p < 0.0001), of positive PANSS scores (13.9 vs 27.7; p < 0.0001), and negative PANSS scores (17.45 vs 28.3; p < 0.0001) between D0 and D90. CGI results confirmed these figures. Follow-up assessment at D180 showed a sustained response on BPRS ans PANSS scores. Amisulpride was well tolerated in the study, with 21% of patients reporting adverse events, in majority psychiatric or endocrine disturbances. Only seven adverse events were assessed as serious. Extra pyramidal symptoms remained low during the study, as measured with Simpson-Angus scale. The EAPS scale showed a significant improvement of social adaptation during the treatment, with a sustained response during the 3-month follow-up period. In conclusion, 600-1 200 mg/d of amisulpride is an effective and well tolerated treatment of schizophrenic disorders, as demonstrated through this 3-month study carried in a large sample of 445 patients. Besides results suggest that under treatment with amisulpride in schizophrenic patients patients' ability to social adaptation can be improved, which could facilitate their rehabilitation.
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