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Antipsychotics/Neuroleptics: Definition, Classification, Indications and Differential Indications

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NeuroPsychopharmacotherapy

Abstract

Schizophrenia is a chronic and severe psychiatric disease with various symptoms and poor prognosis. Antipsychotics are produced to reduce psychotic symptoms such as hallucinations and delusions at first. First-generation antipsychotics were produced in early period. They had antagonistic effect to dopamine pathway in whole brain, they could induce severe side effects such as extrapyramidal symptoms. Second-generation antipsychotics were latterly produced in order to reduce side effects, keeping effects toward psychotic symptoms. They have complex function related to serotonin receptors, or dopamine partial agonist. They succeeded to reduce extrapyramidal symptoms, but they had another metabolic side effects such as weight gain, obesity, and diabetes mellitus. Second-generation antipsychotics are recommended as the first line to treat schizophrenia in these days. When a person has the onset of schizophrenia, antipsychotics should be started as soon as possible. Drugs should be started in low dose at first, then increased gradually up to minimum dose with sufficient effect. Careful monitoring of symptoms and side effects are very important. Antipsychotics have various dosing type (injection, liquid, sublingual, and so on) for the various purpose. Second-generation antipsychotics are used not only for schizophrenia but also other psychiatric diseases like mood disorder, mainly due to the function in serotonin receptor. Other neural receptors different from dopamine and serotonin are also assumed related to pathophysiology of schizophrenia. Next-generation antipsychotics not related to dopamine receptor might be produced in the future.

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Correspondence to Hiroki Ozawa .

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Matsuzaka, Y., Kanegae, S., Ozawa, H. (2021). Antipsychotics/Neuroleptics: Definition, Classification, Indications and Differential Indications. In: Riederer, P., Laux, G., Nagatsu, T., Le, W., Riederer, C. (eds) NeuroPsychopharmacotherapy. Springer, Cham. https://doi.org/10.1007/978-3-319-56015-1_51-1

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  • DOI: https://doi.org/10.1007/978-3-319-56015-1_51-1

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-319-56015-1

  • Online ISBN: 978-3-319-56015-1

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