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
Aperçu de l'étude
Statut
Les conditions
Intervention / Traitement
Description détaillée
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.
Type d'étude
Inscription (Réel)
Phase
- Phase 4
Contacts et emplacements
Lieux d'étude
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Taipei, Taïwan, 100
- Department of Psychiatry, National Taiwan University Hospital
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Critères de participation
Critère d'éligibilité
Âges éligibles pour étudier
Accepte les volontaires sains
Sexes éligibles pour l'étude
La description
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
Plan d'étude
Comment l'étude est-elle conçue ?
Détails de conception
- Objectif principal: Traitement
- Répartition: Randomisé
- Modèle interventionnel: Affectation parallèle
- Masquage: Seul
Armes et Interventions
Groupe de participants / Bras |
Intervention / Traitement |
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Comparateur actif: 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.
Autres noms:
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Comparateur actif: 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.
Autres noms:
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Que mesure l'étude ?
Principaux critères de jugement
Mesure des résultats |
Délai |
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Treatment efficacy was assessed using PNASS, Clinical Global Impression (CGI) Scale, and EPS rating scales
Délai: on days 0, 7, 14, 28, 56
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on days 0, 7, 14, 28, 56
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Mesures de résultats secondaires
Mesure des résultats |
Délai |
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HPLC analysis Genotyping
Délai: on days 0, 14, 56
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on days 0, 14, 56
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Collaborateurs et enquêteurs
Parrainer
Collaborateurs
Les enquêteurs
- Chaise d'étude: Tzung-Jeng Hwang, MD, Department of Psychiatry, National Taiwan University Hospital
Publications et liens utiles
Publications générales
- 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.
Dates d'enregistrement des études
Dates principales de l'étude
Début de l'étude
Achèvement primaire (Réel)
Achèvement de l'étude (Réel)
Dates d'inscription aux études
Première soumission
Première soumission répondant aux critères de contrôle qualité
Première publication (Estimation)
Mises à jour des dossiers d'étude
Dernière mise à jour publiée (Estimation)
Dernière mise à jour soumise répondant aux critères de contrôle qualité
Dernière vérification
Plus d'information
Termes liés à cette étude
Termes MeSH pertinents supplémentaires
- Les troubles mentaux
- Spectre de la schizophrénie et autres troubles psychotiques
- La schizophrénie
- Troubles psychotiques
- Effets physiologiques des médicaments
- Agents neurotransmetteurs
- Mécanismes moléculaires de l'action pharmacologique
- Dépresseurs du système nerveux central
- Agents antipsychotiques
- Agents tranquillisants
- Médicaments psychotropes
- Agents de sérotonine
- Agents antidépresseurs
- Agonistes de la dopamine
- Agents dopaminergiques
- Agonistes des récepteurs de la sérotonine 5-HT1
- Agonistes des récepteurs de la sérotonine
- Antagonistes des récepteurs de la sérotonine 5-HT2
- Antagonistes de la sérotonine
- Antagonistes des récepteurs de la dopamine D2
- Antagonistes de la dopamine
- Aripiprazole
Autres numéros d'identification d'étude
- 200705030M
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