Long-Term Olanzapine Treatment in Children With Autism
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ClinicalTrials.gov Identifier: NCT00183404 |
Recruitment Status :
Completed
First Posted : September 16, 2005
Last Update Posted : August 15, 2014
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Condition or disease | Intervention/treatment | Phase |
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Autism | Drug: Olanzapine | Phase 2 Phase 3 |
Autism is a serious childhood disorder that can significantly impair functioning and development. Educational and psychosocial programs are standard treatments for autistic children, but drug therapy is often needed as well. Haloperidol is the drug most commonly prescribed for symptoms of autism. However, long-term administration of haloperidol has been associated with adverse effects such as blurred vision, constipation, and nausea. The investigation of alternative drug treatments is necessary. This study will determine whether the antipsychotic drug olanzapine may be a safe and effective alternative to haloperidol for treating symptoms of autism in children.
This study will last 36 weeks and will comprise 2 phases. In Phase I, participants will be randomly assigned to receive either olanzapine or placebo for 12 weeks. Participants who do not respond to treatment will complete their participation in the study. Participants who respond to their assigned Phase I treatment will continue onto Phase II. All Phase II participants will receive olanzapine daily for 6 months. Self-report scales and checklists will be used to assess participants after each phase; these measures will be completed by participants and their parents.
Study Type : | Interventional (Clinical Trial) |
Actual Enrollment : | 32 participants |
Allocation: | N/A |
Intervention Model: | Single Group Assignment |
Masking: | None (Open Label) |
Primary Purpose: | Treatment |
Official Title: | Long-Term Olanzapine Treatment in Children With Autism |
Study Start Date : | September 2004 |
Actual Primary Completion Date : | July 2011 |
Actual Study Completion Date : | October 2011 |

Arm | Intervention/treatment |
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Experimental: Olanzapine
Participants will take open olanzapine for up to 20 additional weeks after phase 1.
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Drug: Olanzapine
Olanzapine tablets, dosed once or twice per day, dosage 2.5 to 20 mg per day
Other Name: Open Olanzapine |
- Children's Psychiatric Rating Scale [ Time Frame: Measured monthly throughout the study ]
- Aberrant Behavior Checklist [ Time Frame: Measured monthly throughout the study ]
- Clinical Global Impressions [ Time Frame: Measured monthly throughout the study ]
- Treatment Emergent Symptoms Scale [ Time Frame: Measured monthly throughout the study ]
- Olanzapine Untoward Effects Checklist [ Time Frame: Measured monthly throughout the study ]
- Abnormal Involuntary Movement Scale [ Time Frame: Measured monthly throughout the study ]
- Neurological Rating Scale [ Time Frame: Measured monthly throughout the study ]

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.
Ages Eligible for Study: | 3 Years to 12 Years (Child) |
Sexes Eligible for Study: | All |
Accepts Healthy Volunteers: | No |
Inclusion Criteria:
- Diagnosis of autism
- Parent or guardian willing to provide informed consent
Exclusion Criteria:
- Uncontrolled seizure disorder
- Medical illness other than autism affecting the whole body
- Obesity
- History of psychosis
- Impairment of voluntary movement
- History of olanzapine treatment

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00183404
United States, Pennsylvania | |
Drexel University College of Medicine at Friends Hospital | |
Philadelphia, Pennsylvania, United States, 19124 |
Principal Investigator: | Richard P. Malone, MD | Drexel University College of Medicine |
Responsible Party: | Drexel University |
ClinicalTrials.gov Identifier: | NCT00183404 |
Other Study ID Numbers: |
R01MH073524 ( U.S. NIH Grant/Contract ) R01MH073524 ( U.S. NIH Grant/Contract ) DDTR B2-NDA ( Other Grant/Funding Number: NIH ) |
First Posted: | September 16, 2005 Key Record Dates |
Last Update Posted: | August 15, 2014 |
Last Verified: | August 2014 |
Drug Treatment Child Olanzapine |
Autistic Disorder Autism Spectrum Disorder Child Development Disorders, Pervasive Neurodevelopmental Disorders Mental Disorders Olanzapine Antiemetics Autonomic Agents Peripheral Nervous System Agents Physiological Effects of Drugs Gastrointestinal Agents |
Antipsychotic Agents Tranquilizing Agents Central Nervous System Depressants Psychotropic Drugs Serotonin Uptake Inhibitors Neurotransmitter Uptake Inhibitors Membrane Transport Modulators Molecular Mechanisms of Pharmacological Action Neurotransmitter Agents Serotonin Agents |