Evaluation of the Strategies of Switching Schizophrenia Patients to Aripiprazole From Other Antipsychotic Agents
Evaluation of the Strategies of Switching Schizophrenia Patients to Aripiprazole From Other Antipsychotic Agents: Combination of Pharmacogenomics and Therapeutic Drug Monitoring
Panoramica dello studio
Stato
Condizioni
Intervento / Trattamento
Descrizione dettagliata
Aripiprazole (commercial name abilify) is the first commercially available drug with dopamine partial agonist effects approved for the treatment of schizophrenia and bipolar disorder since 2002 in the U.S. It reduces negative symptoms of schizophrenia efficiently and has a markedly lower incidence of extrapyramidal symptoms and tardive dyskinesia. However, the process of switching other antipsychotic agents to aripiprazole can result in a re-emergence or worsening of psychosis, along with unpleasant side effects such as insomnia, nausea, vomiting, anxiety and agitation. On the basis of a prior study demonstrating the efficacy and safety of aripiprazole in Taiwan population, we hence propose to apply a combined use of pharmacogenomics and therapeutic drug monitoring in the evaluation of the strategies of switching stable schizophrenia patients to aripiprazole from other antipsychotic agents.
We will evaluate their cytochrome P450 background along with other potential candidate genes of schizophrenia. This 2-year proposal will examine the relative efficacy, safety and tolerability of two different strategies for switching stable inpatients/outpatients from prior antipsychotic monotherapy to aripiprazole 15 mg/day monotherapy using two different strategies:
- Fast tapering of the previous medication within 1 week after initiating aripiprazole for 2 weeks.
- Slow tapering of the previous medication within 4 weeks after initiating aripiprazole for 2 weeks.
A total of 200 stable schizophrenia patients will be randomized with open label to two strategies.
We expect to achieve the following results:
- Developing a protocol that has high probability of switching successfully schizophrenia patients to aripiprazole, which is effective in treatment refractory cases and has a markedly lower incidence of severe side effects, from other antipsychotics.
- Elucidate both pharmacokinetic and pharmacodynamic factors associated with clinical efficacy of aripiprazole.
Tipo di studio
Iscrizione (Effettivo)
Fase
- Fase 4
Contatti e Sedi
Luoghi di studio
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Taipei, Taiwan, 100
- Department of Psychiatry, National Taiwan University Hospital
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Criteri di partecipazione
Criteri di ammissibilità
Età idonea allo studio
Accetta volontari sani
Sessi ammissibili allo studio
Descrizione
Inclusion Criteria:
- Men and non-lactating, non-pregnant women who are aged 18 to 65 years
- primary diagnosis of DSM-IV schizophrenia or schizoaffective disorder
- taking a stabilized dose of a single oral antipsychotic for at least 1 month prior to study entry
- cannot have been hospitalized for an exacerbation of schizophrenia or schizoaffective disorder for at least 2 months
Exclusion Criteria:
- having other psychiatric disorders
- hospitalizing for acute exacerbation of patients' condition within 2 months
- having taken a selective serotonin reuptake inhibitor (SSRI) within 4 weeks of screening
- a first episode of schizophrenia or schizoaffective disorder
- a clinically significant neurological abnormality other than tardive dyskinesia or EPS
- current diagnosis of psychoactive substance dependence or a historical drug or alcohol abuse within 1 month before the beginning of the study
- treatment with an investigational drug within 4 weeks prior to randomization
- requiring to take medication that inhibits the microsomal enzyme CYP2D6 or inhibits or acts as a substrate for CYP3A4
Piano di studio
Come è strutturato lo studio?
Dettagli di progettazione
- Scopo principale: Trattamento
- Assegnazione: Randomizzato
- Modello interventistico: Assegnazione parallela
- Mascheramento: Separare
Armi e interventi
Gruppo di partecipanti / Arm |
Intervento / Trattamento |
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Comparatore attivo: 1
fast tapering of the previous medication within 1 week after initiating aripiprazole for 2 weeks
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Aripiprazole will be given as a fixed does, 15 mg/day, orally throughout 8 weeks in the 2 arms.
Altri nomi:
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Comparatore attivo: 2
slow tapering of the previous medication within 4 weeks after initiating aripiprazole for 2 weeks
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Aripiprazole will be given as a fixed does, 15 mg/day, orally throughout 8 weeks in the 2 arms.
Altri nomi:
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Cosa sta misurando lo studio?
Misure di risultato primarie
Misura del risultato |
Lasso di tempo |
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Treatment efficacy was assessed using PNASS, Clinical Global Impression (CGI) Scale, and EPS rating scales
Lasso di tempo: on days 0, 7, 14, 28, 56
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on days 0, 7, 14, 28, 56
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Misure di risultato secondarie
Misura del risultato |
Lasso di tempo |
|---|---|
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HPLC analysis Genotyping
Lasso di tempo: on days 0, 14, 56
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on days 0, 14, 56
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Collaboratori e investigatori
Collaboratori
Investigatori
- Cattedra di studio: Tzung-Jeng Hwang, MD, Department of Psychiatry, National Taiwan University Hospital
Pubblicazioni e link utili
Pubblicazioni generali
- Ma CH, Chan HY, Hsieh MH, Liu CC, Liu CM, Hwu HG, Kuo CH, Chen WJ, Hwang TJ. Identifying dopamine supersensitivity through a randomized controlled study of switching to aripiprazole from other antipsychotic agents in patients with schizophrenia. Ther Adv Psychopharmacol. 2022 Jan 28;12:20451253211064396. doi: 10.1177/20451253211064396. eCollection 2022.
- Jen YW, Hwang TJ, Chan HY, Hsieh MH, Liu CC, Liu CM, Hwu HG, Kuo CH, Lin YT, Chien YL, Chen WJ. Abnormally low prolactin levels in schizophrenia patients after switching to aripiprazole in a randomized trial: a biomarker for rebound in psychotic symptoms? BMC Psychiatry. 2020 Nov 23;20(1):552. doi: 10.1186/s12888-020-02957-7.
Studiare le date dei record
Studia le date principali
Inizio studio
Completamento primario (Effettivo)
Completamento dello studio (Effettivo)
Date di iscrizione allo studio
Primo inviato
Primo inviato che soddisfa i criteri di controllo qualità
Primo Inserito (Stima)
Aggiornamenti dei record di studio
Ultimo aggiornamento pubblicato (Stima)
Ultimo aggiornamento inviato che soddisfa i criteri QC
Ultimo verificato
Maggiori informazioni
Termini relativi a questo studio
Termini MeSH pertinenti aggiuntivi
- Disordini mentali
- Spettro della schizofrenia e altri disturbi psicotici
- Schizofrenia
- Disturbi psicotici
- Effetti fisiologici delle droghe
- Agenti neurotrasmettitori
- Meccanismi molecolari dell'azione farmacologica
- Depressori del sistema nervoso centrale
- Agenti antipsicotici
- Agenti tranquillanti
- Psicofarmaci
- Agenti serotoninergici
- Agenti antidepressivi
- Agonisti della dopamina
- Agenti dopaminergici
- Agonisti del recettore della serotonina 5-HT1
- Agonisti del recettore della serotonina
- Antagonisti del recettore della serotonina 5-HT2
- Antagonisti della serotonina
- Antagonisti del recettore della dopamina D2
- Antagonisti della dopamina
- Aripiprazolo
Altri numeri di identificazione dello studio
- 200705030M
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