A Crossover Study of the Acute Effects of Olanzapine in Healthy Volunteers

This study has been completed.
American Medical Association
Information provided by (Responsible Party):
Vance L. Albaugh, Penn State University
ClinicalTrials.gov Identifier:
First received: August 22, 2008
Last updated: October 31, 2011
Last verified: October 2011

The purpose of this clinical research study is to examine the acute hormonal and metabolic effects of the drug olanzapine, as well as appetite effects, in healthy volunteers. The hypotheses to be tested are that: (1) Olanzapine rapidly attenuates plasma leptin and (2) rapidly alters glucose tolerance in healthy volunteers. These questions will be answered by having volunteers undergo two glucose tolerance tests in a crossover study design.

Condition Intervention
Insulin Resistance
Diabetes Mellitus
Drug: Olanzapine
Drug: Placebo

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: Double Blind (Subject, Caregiver, Investigator)
Primary Purpose: Basic Science
Official Title: A Double-blind, Placebo-controlled, Crossover Study Examining the Acute Effects of Olanzapine on Plasma Leptin, Glucose Tolerance and Free Fatty Acids in Healthy Volunteers

Resource links provided by NLM:

Further study details as provided by Penn State University:

Primary Outcome Measures:
  • Plasma Leptin [ Time Frame: 3 Days ] [ Designated as safety issue: No ]
    Leptin following placebo treatment

  • Plasma Leptin [ Time Frame: 3 days ] [ Designated as safety issue: No ]
    Leptin following olanzapine treatment

Secondary Outcome Measures:
  • Glucose Tolerance [ Time Frame: 3 Days ] [ Designated as safety issue: No ]
    Oral Glucose Tolerance following placebo treatment

  • Glucose Tolerance [ Time Frame: 3 days ] [ Designated as safety issue: No ]
    Oral Glucose Tolerance following olanzapine treatment

Enrollment: 15
Study Start Date: August 2008
Study Completion Date: May 2011
Primary Completion Date: December 2010 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Placebo Comparator: 1 Drug: Placebo
(1) placebo tablets administered orally before bed for three consecutive evenings (Total Dose = 3 tablets)
Other Name: Sugar pill
Experimental: 2 Drug: Olanzapine
(1) 10 mg tablets administered orally before bed for three consecutive evenings (Total Dose = 30 mg, 3 tablets)
Other Name: Zyprexa


Ages Eligible for Study:   18 Years to 30 Years
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Healthy Volunteer
  • Body Mass Index of 18.5-25 kilograms per square meter
  • Must be able to swallow tablets
  • Able to give informed consent

Exclusion Criteria:

  • Any DSM-IV TR Axis I psychiatric disorder (except nicotine dependence)
  • Presence of any medical disorder that may confound the assessment of relevant biologic measures, including: significant organ system dysfunction, metabolic diseases, type 1 diabetes mellitus, type 2 diabetes mellitus, pregnancy, endocrine disease, coagulopathy, clinically significant anemia, or acute infection
  • Subjects who have taken any antipsychotic medication within the last 6 months
  • Personal or family history of seizures and/or cardiac arrhythmias
  Contacts and Locations
Please refer to this study by its ClinicalTrials.gov identifier: NCT00741026

United States, Pennsylvania
Penn State College of Medicine, Penn State Milton S. Hershey Medical Center
Hershey, Pennsylvania, United States, 17033
Sponsors and Collaborators
Penn State University
American Medical Association
Study Director: Ravi Singareddy, M.D. Penn State College of Medicine, Penn State Milton S. Hershey Medical Center
Principal Investigator: Vance L Albaugh, M.D., Ph.D. Penn State College of Medicine
  More Information

Responsible Party: Vance L. Albaugh, MD/PhD Student, Penn State University
ClinicalTrials.gov Identifier: NCT00741026     History of Changes
Other Study ID Numbers: 28230
Study First Received: August 22, 2008
Last Updated: October 31, 2011
Health Authority: United States: Institutional Review Board

Keywords provided by Penn State University:
Insulin Resistance
Diabetes mellitus

Additional relevant MeSH terms:
Diabetes Mellitus
Insulin Resistance
Glucose Metabolism Disorders
Metabolic Diseases
Endocrine System Diseases
Antipsychotic Agents
Tranquilizing Agents
Central Nervous System Depressants
Physiological Effects of Drugs
Pharmacologic Actions
Central Nervous System Agents
Therapeutic Uses
Psychotropic Drugs
Serotonin Uptake Inhibitors
Neurotransmitter Uptake Inhibitors
Neurotransmitter Agents
Molecular Mechanisms of Pharmacological Action
Serotonin Agents
Autonomic Agents
Peripheral Nervous System Agents
Gastrointestinal Agents

ClinicalTrials.gov processed this record on April 15, 2014