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  • Title: [New antipsychotic agents].
    Author: Olie JP, Ghaoui S, Bayle FJ.
    Journal: Encephale; 1999 Nov; 25 Spec No 3():52-60. PubMed ID: 10598295.
    Abstract:
    Since the discovery of the neuroleptics in 1952, french psychiatrists have proposed a classification of neuroleptics taking into account the pharmalogical and therapeutic differences between these drugs. They distinguished three different clinical effects of neuroleptics: sedative effects, effects on the positive symptoms of schizophrenia and effects on the negative symptoms. However these agents have many side effects including the extrapyramidal syndrome (EPS), akathisia, dystonia and parkinsonism. These side effects occur in up to 75% of patients receiving typical neuroleptics and are the main cause of non-compliance. Since the eighties, clozapine was introduced for use in refractory patients because it has a better efficacy (than haloperidol) specifically on negative symptoms, a better tolerance and fewer effects. After clozapine, several new antipsychotic agents are now available, such as risperidone, olanzapine, sertindole, quietapine, ziprasidone ... Their therapeutical effects are probably linked with a dual antagonist effect on 5HT2 and D2 receptors. The present article reviews the evolution of the use of these new agents, their real efficacy, their adverse effects and their expanding indications. Future research will more clearly establish appropriate treatment guidelines for their use. These new antipsychotics should add a positive modification in schizophrenia care and in some mood disorders. The approach consisting on individualizing dimensions and clusters analysis might be useful to test the efficiency of each antipsychotic on a syndromic dimension.
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