Heart Rate Changes in Schizophrenic and Bipolar Patients Under the Medication of Aripiprazole and Quetiapine

2014-08-27 03:16:45 | BioPortfolio


The goal of this research is investigating the heart rate changes in schizophrenic and bipolar patients under the medication of aripiprazole and quetiapine. In the mean time, we are hoping further investigating the interrelationship of medicine dosage and heart rate change, in order to acquire the best relationship both effectiveness as well as safety in acceptable heart rate change of clinical suggestion.


Primary Goal: The goal of this research is investigating the heart rate changes in schizophrenic and bipolar patients under the medication of aripiprazole and quetiapine. As we known, clozapine, an antipsychotic, could cause fatal cardiac arrhythmia; in previous reports showed fatal rate about 0.7%, in spite of not very high, it reflects heart rate change decreasing. Therefore, many researches begin to focus on the relationship and heart rate change. Quetiapine, an atypical antipsychotic, FDA approved in 1997, Department of Health (DOH) in Taiwan also approved for schizophrenia for its effectiveness of negative disorders, low extrapyramidal syndrome, low side-effects of muscle catatonia and sluggishness. The side-effects of quetiapine are lethargy, nausea (occur rate 9%-44%), insomnia (12%), postural hypotension (4%-7%), constipation(8-10%), thirsty (9%-44%), weight gain (5-23%) and liver enzyme (GGT、AST、ALT) increasing (6%). Aripiprazole, FDA approved in 2002, DOH in Taiwan also approved for schizophrenia for its effective remittance of positive disorders, also effective for negative disorders and cognitive function regression. Besides, aripiprazole combine lithium or valproic acid can control the onset of manic and mixure of bipolar patients. The side-effects of aripiprazole are few, low extrapyramidal syndrome, no significant weight gain and blood sugar level, not surge in prolactin level and low menstrual cycle abnormal, gynecomastia and sexual dysfunction. Other side-effects are postural hypotension (0.6%-4%), headache (12%-27%), lethargy (8%-18%), insomnia (5%-26.3%), constipation (5-11%). Both quetiapine and aripiprazole are atypical antipsychotic, serious side-effects are fewer than typical antipsychotics, however, in some sensitive patients still have some side-effects such as limb-stiffness and akathisia (quetiapine 4%-12%, aripiprazole 2%-27.3%). In some retrospect researches, quetiapine will increase the opportunity of cardio- sudden death and pass off by 0.3%-1% in age 30-74 adult. On the other hand, aripiprazole (0.1%-1%) showed prolonging of QT wave which was considered as a danger factor of fatal arrhythmia. Despite of the danger, serious side-effects are rare, aripiprazole and quetiapine are widely used in clinical.

This study hope to further study whether quetiapine and aripiprazole will occur heart rate changes similar to clozapine, using heart rate changes approach to find out the possibility of causing arrhythmia and fatal of these 2 medicines.

Secondary goal:

1. Further investigate the relationship of drug dosage and heart rate change, in order to acquire the best relationship both effectiveness as well as safety in acceptable heart rate change of clinical suggestion.

2. The subjects of this study are schizophrenic and bipolar patients, who use quetiapine and aripiprazole, also will stratify into gender, age and influence of heart rate changes.

Study Design

Allocation: Non-Randomized, Control: Active Control, Endpoint Classification: Pharmacokinetics/Dynamics Study, Intervention Model: Parallel Assignment, Masking: Single Blind (Subject), Primary Purpose: Treatment




Aripiprazole; Quetiapine


Taichung Veterans General Hospital
Taichung City




Taichung Veterans General Hospital

Results (where available)

View Results


Published on BioPortfolio: 2014-08-27T03:16:45-0400

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Medical and Biotech [MESH] Definitions

A dibenzothiazepine and ANTIPSYCHOTIC AGENT that targets the SEROTONIN 5-HT2 RECEPTOR; HISTAMINE H1 RECEPTOR, adrenergic alpha1 and alpha2 receptors, as well as the DOPAMINE D1 RECEPTOR and DOPAMINE D2 RECEPTOR. It is used in the treatment of SCHIZOPHRENIA; BIPOLAR DISORDER and DEPRESSIVE DISORDER.

A chronic form of schizophrenia characterized primarily by the presence of persecutory or grandiose delusions, often associated with hallucination.

A type of schizophrenia characterized by abnormality of motor behavior which may involve particular forms of stupor, rigidity, excitement or inappropriate posture.

An obsolete concept, historically used for childhood mental disorders thought to be a form of schizophrenia.

An antipsychotic agent that is structurally related to piperazines and quinolones. It is a partial agonist of SEROTONIN RECEPTOR, 5-HT1A and DOPAMINE D2 RECEPTORS, where it also functions as a post-synaptic antagonist, and an antagonist of SEROTONIN RECEPTOR, 5-HT2A.

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