Evaluation of Negative Symptoms and Cognitive Function After Administration of Antipsychotics in Healthy Volunteer

Study Overview
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Brief Summary
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The aim of the study is to investigate the negative symptoms and cognitive function after administration of antipsychotics in healthy volunteer.

Official Title
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Evaluation of Negative Symptoms and Cognitive Function After Administration of Antipsychotics in Healthy Volunteer: a Double-blind, Randomized Trial of a Single Dose of Placebo, Haloperidol, Amisulpride, Risperidone and Aripiprazole

Conditions
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Normal Volunteers

Intervention / Treatment
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* Drug: risperidone
* Drug: aripiprazole
* Drug: haloperidol
* Drug: amisulpride
* Drug: lactose


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Aged 18-38 years and meet no DSM-IV diagnostic criteria as assessed by using the Structured Clinical Interview for DSM-IV, research version. Exclusion Criteria: 1) anyone who participated in other clinical trials within 30 days from the start of this clinical trial or is currently participating in one, 2) anyone who has progressive disease or in unstable medical condition unfit for the trial, 3) anyone who has been diagnosed in psychiatric terms in the past, depends on psychotropic substance, or has overdosed or depended on the substance or alcohol (except for coffee or tobacco) within 1 month from the trial start, 4) anyone who is suicidal or highly probable of suicides, or 5) anyone who has test results considered clinically meaningful

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 38 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| risperidone<br> | Drug: risperidone<br> <br> |
| aripiprazole<br> | Drug: aripiprazole<br> <br> |
| haloperidol<br> | Drug: haloperidol<br> <br> |
| amisulpride<br> | Drug: amisulpride<br> <br> |
| lactose<br> | Drug: lactose<br> <br> |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Symptoms assessment by objective and subjective rating scale | VAS - mental sedation (alert-drowsy, muzzy-clear headed, mentally slow-quick witted, attentive-dreamy), physical sedation (strong-feeble, well coordinated-clumsy, lethargic-energetic, incompetent-proficient), tranquilization (calm-excited, contented-discontented, troubled-tranquil, tense-relaxed) | 2 hour | 
| Symptoms assessment by objective and subjective rating scales & CNT | SANS-alogia and blunted affect, SDSS-Subjective Deficit Syndrome Scale ,self-report questionnaire to measure lack of energy, blunted affect, and difficulty in or altered thinking, consisting of 19 questions, with the scales from 0 to 4 NIDSS-consists of 20 items with a five-point Likert scale (from 0, none to 4, severe) and has three subscales: avolition (five items), blunted affect (five items), and cognition (ten items), CNT-computerized neuropsychological test, VAS | 4hour | 
| Symptoms assessment by objective and subjective rating scales | SANS, SDSS, NIDSS, VAS SANS-alogia and blunted affect, SDSS-Subjective Deficit Syndrome Scale ,self-report questionnaire to measure lack of energy, blunted affect, and difficulty in or altered thinking, consisting of 19 questions, with the scales from 0 to 4 NIDSS-consists of 20 items with a five-point Likert scale (from 0, none to 4, severe) and has three subscales: avolition (five items), blunted affect (five items), and cognition (ten items), VAS | 24hour | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Symptoms assessment by objective rating scale | BARS-Barnes akathisia rating scale (BAS), consisting of 4 items, identifies drug-induced akathisia and measures severity, SAS-Simpson-angus scale (SAS), consisting of 10 items, measures neuroleptic induced parkinsonism | 4hour | 
| Symptoms assessment by objective rating scale | BARS, SAS | 24hour |