A Study of Zonisamide to Prevent Olanzapine-Associated Weight Gain

Phase 3

Completed

• Conditions: Weight Gain
• Interventions: Drug: Zonisamide; Drug: olanzapine; Drug: Sugar Pill (placebo)

• Registration Number: NCT00363376
• Lead Sponsor: Lindner Center of HOPE

Brief Summary

The specific aim of this study is to evaluate the efficacy, tolerability, and safety of zonisamide therapy in the prevention of weight gain associated with olanzapine treatment for psychotic or bipolar disorders.

Detailed Description

This is a single center, 16-week, randomized, double-blind, placebo-controlled, parallel group, flexible-dose study in 60 outpatients with schizophrenia, schizoaffective disorder, schizophreniform disorder, delusional disorder, psychotic disorder NOS, or bipolar disorder types I, II, or NOS by DSM-IV-TR criteria43 with a BMI \> 22 for whom treatment with olanzapine (5-20 mg/day) would be appropriate as monotherapy or adjunctive therapy. Subjects who meet entry criteria will be randomized to treatment with olanzapine plus zonisamide or olanzapine plus placebo. All subjects will receive Personal Wellness Solution Counseling (http://www.zyprexa.com/hcp/hcp_patient_c_solutions_print.jsp). Both before and after randomization to zonisamide or placebo, patients will not be permitted to have any other major psychotropic medications (antipsychotics, mood stabilizers, antidepressants, or anxiolytics) added to their medication regimens. The primary outcome measure will be change in weight. Secondary outcome measures will include the Young Mania Rating Scale (YMRS),44 the Inventory for Depressive Symptoms (IDS),45 the Positive and Negative Symptoms Scale (PANSS),46 the Clinician Global Improvement (CGI) scale,47 the Binge Eating Scale (BES) 48, BMI, waist circumference, and metabolic variables (fasting lipids, glucose, insulin).

Subjects will be inpatients or outpatients at the time of randomization to olanzapine-zonisamide or olanzapine-placebo. Throughout the study, psychiatric scales will be used to assess psychiatric symptoms, and the presence of treatment-emergent adverse events will be monitored and recorded.

Study Timeline

• Study First Submitted: 2006-08-09
• Study First Submitted QC: 2006-08-09
• Study First Posted: 2006-08-15
• Study Start: 2008-01
• Primary Completion: 2011-02
• Study Completion: 2011-02
• Status Verified: 2012-04
• Last Update Submitted: 2012-04-11
• Last Update Posted: 2012-04-13

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 42

Inclusion Criteria

Criteria for entering this study will include all of the following:

1. Subjects must be 18 years of age or older.
2. Subjects must have schizophrenia, schizoaffective disorder, schizophreniform disorder, delusional disorder, psychotic disorder NOS, or bipolar I, II, or NOS disorder as defined by DSM-IV-TR criteria.
3. Subjects must have a BMI > 22.
4. Subjects must sign the Informed Consent Document after the nature of the trial has been fully explained.
5. If female, subjects must be: postmenopausal, surgically incapable of childbearing, or practicing medically acceptable effective method(s) of contraception (e.g., hormonal methods, intrauterine device) for at least one month prior to study entry and throughout the study.
6. If exposed to olanzapine in the past, subjects must be free of olanzapine for > 3 months prior to randomization to study medication.

Exclusion Criteria

Criteria for exclusion from this study will be any of the following:

1. Subjects with clinically significant suicidal or homicidal ideation.
2. Subjects with a current DSM-IV Axis I diagnosis of delirium, dementia, amnesia, or other cognitive disorders; a psychotic or mood disorder secondary to substance use or a general medical disorder; or a DSM-IV diagnosis of a substance use disorder within the past six months.
3. Cardiovascular, endocrine, neurologic, or hematologic disease as determined by the clinical judgment of the clinical investigator. Subjects with hypo- or hyperthyroidism unless stabilized on thyroid replacement > 3 months.
4. Subjects who are allergic to or who have demonstrated hypersensitivity to or significant adverse event from olanzapine.
5. Subjects who are allergic to or who have demonstrated hypersensitivity to zonisamide.
6. Women who are pregnant or nursing.
7. Subjects who have received an experimental drug or used an experimental device within 30 days.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Sugar pill	Zonisamide	olanzapine and placebo ("sugar pill")
Zonisamide	Zonisamide	olanzapine and zonisamide (active drug)
Sugar pill	Sugar Pill (placebo)	olanzapine and placebo ("sugar pill")
Sugar pill	olanzapine	olanzapine and placebo ("sugar pill")
Zonisamide	olanzapine	olanzapine and zonisamide (active drug)

Primary Outcome Measures

Name	Time	Method
change in weight from baseline to endpoint	16 weeks

Secondary Outcome Measures

Name	Time	Method
changes, from baseline to endpoint, in BMI	16 weeks
changes, from baseline to endpoint, in clinical global improvement of psychiatric symptoms	16 weeks
changes, from baseline to endpoint, in psychotic symptoms	16 weeks
changes, from baseline to endpoint, in abdominal circumference	16 weeks
changes, from baseline to endpoint, in metabolic parameters	16 weeks
changes, from baseline to endpoint, in manic symptoms	16 weeks
changes, from baseline to endpoint, in depressive symptoms	16 weeks

Trial Locations

Locations (1)

The Lindner Center of HOPE; 🇺🇸 Mason, Ohio, United States