Effects of Duloxetine on Pathological Worry in Patients With Generalized Anxiety Disorder: A fMRI Study

December 21, 2008 updated by: National Taiwan University Hospital
(1) to compare the differences of neural activation of pathological worry between pre-treatment GAD patients and normal subjects; (2) to measure the differences of brain activation on worry in GAD patients before and after duloxetine treatment

Study Overview

Status

Terminated

Conditions

Intervention / Treatment

Detailed Description

The study will recruit 20 GAD patients and 20 healthy controls. Both patients and controls receive a medical and psychiatric screening procedure at visit 1 and are asked to complete three self-rating questionnaires and one health questionnaire at visit 1. All qualified participants will receive functional magnetic resonance imaging (fMRI) at baseline.

The patients will begin treatment with duloxetine 30 mg/day at visit 2 and will be titrated to 60 mg/day at visit 3 (2 week since drug dispensed). The dosage will be maintained on 60 mg/day for 6 more weeks. During the period, the patients will receive periodic evaluations at visit 2 (0 week drug dispensed), 3 (2 week since drug dispensed), 4 (4 weeks since drug dispensed), and 5 (8 weeks since drug dispensed). The patients will receive fMRI examination at baseline and at the end of the 8-week treatment.

Study Type

Interventional

Enrollment (Actual)

23

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

      • Taipei, Taiwan
        • National Taiwan University Hospital

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years to 65 years (Adult, Older Adult)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • DSM-IV criteria of generalized anxiety disorders with moderate degree
  • Participants above 18 years old

Exclusion Criteria:

  • Major depression
  • Panic disorder
  • Obsessive-compulsive disorder
  • Post-traumatic disorder
  • Eating disorders
  • Psychotic disorders; and
  • Alcohol or other substance use disorders
  • Neurological disease
  • Cardio-vascular disease
  • Respiratory disease
  • Head trauma

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Basic Science
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
difference of brain activation on worry
Time Frame: two months
two months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Investigators

  • Study Director: Mei-Chih Tseng, MD, NTUH

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

April 1, 2007

Primary Completion (Actual)

November 1, 2008

Study Completion (Actual)

November 1, 2008

Study Registration Dates

First Submitted

June 23, 2007

First Submitted That Met QC Criteria

June 25, 2007

First Posted (Estimate)

June 26, 2007

Study Record Updates

Last Update Posted (Estimate)

December 23, 2008

Last Update Submitted That Met QC Criteria

December 21, 2008

Last Verified

December 1, 2008

More Information

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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