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Pregabalin in the Treatment of Patients With Generalized Anxiety Disorder (GAD).

This study has been completed.
Information provided by:
Pfizer Identifier:
First received: December 15, 2006
Last updated: December 3, 2009
Last verified: December 2009
The primary objective of this study is to evaluate the efficacy of pregabalin as compared to placebo in the treatment of patients with general anxiety disorder (GAD). Efficacy will be measured by the improvement in the total Hamilton Anxiety Rating Scale (HAM-A) scores from baseline observed following 8 weeks of double-blind treatment or at earlier termination during the double-blind treatment phase and analyzed using a mixed linear model for repeated measures.

Condition Intervention Phase
Generalized Anxiety Disorder Drug: pregabalin Drug: placebo Phase 3

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double (Participant, Investigator)
Primary Purpose: Treatment
Official Title: An 8-Week, Double-Blind, Placebo-Controlled, Phase 3 Trial of Pregabalin (150-600 mg/Day) in the Adjunctive Treatment of Patients With Generalized Anxiety Disorder (GAD) Who Have Not Optimally Responded to Existing Therapies(GAD)

Resource links provided by NLM:

Further study details as provided by Pfizer:

Primary Outcome Measures:
  • Change in Hamilton Anxiety Rating Scale (HAM-A) Total Scores [ Time Frame: Baseline, 8 weeks ]

Secondary Outcome Measures:
  • Change in HAM-A Total Score at Weekly Visits [ Time Frame: Baseline, Weeks 1 through Week 8 ]
  • Number of Responders Using Hamilton Anxiety Rating Scale (HAM-A) [ Time Frame: Weeks 1 through Week 8 ]
  • Subjects in Remission Using Hamilton Anxiety Rating Scale (HAM-A) Total Score [ Time Frame: Week 1 through Week 8 ]
  • Time to Onset of Sustained Hamilton Anxiety Rating Scale (HAM-A) Improvement [ Time Frame: Week 8 ]
  • Number of Responders Using Clinical Global Impression of Improvement (CGI-I) Score [ Time Frame: Week 1 through Week 8 ]
  • Clinical Global Impression of Severity (CGI-S) Score [ Time Frame: Week 8 ]
  • Change in Hamilton Depression Rating Scale (HAM-D) Total Score [ Time Frame: Weeks 1 through Week 8 ]

Enrollment: 356
Study Start Date: December 2006
Study Completion Date: March 2008
Primary Completion Date: February 2008 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Placebo Comparator: Arm 2 Drug: placebo
placebo + concurrent GAD treatment from the open-label study period
Experimental: Arm 1 Drug: pregabalin
pregabalin 150-600 mg/day flexibly dosed for the first 6 weeks and fixed dosed for the last 2 weeks of total 8 weeks of double blind study period, + concurrent GAD treatment from the open-label study period
Other Name: Lyrica

Detailed Description:
Further enrollment in this study was stopped on January 28, 2008 based on the recommendation of an independent data monitoring committee. The recommendation to stop the study was not based on any safety findings.

Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Adult male and female subjects with primary DSM-IV diagnosis of GAD, as confirmed by the MINI structured interview.
  • Historical failure to respond optimally to a GAD treatment

Exclusion Criteria:

  • Current primary DSM-IV (Diagnostic and Statistical Manual of Mental Disorders 4th edition) diagnosis of major depressive disorder with or without seasonal pattern, dysthmic disorder, depressive disorder NOS (not otherwise specified), social phobia, panic disorder with or without agoraphobia, post traumatic stress disorder, dissociative disorder, borderline personality disorder, obsessive-compulsive disorder, antisocial personality disorder, as defined in the DSM-IV TR (Diagnostic and Statistical Manual of Mental Disorders 4th edition, Text Revision).
  • Past and/or current DSM-IV diagnosis of schizophrenia, schizoaffective disorder, other psychotic disorders, bipolar disorders (I or II), factitious disorder or cognitive disorder (including delirium, dementia, and amnestic disorder).
  Contacts and Locations
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, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT00413010

  Show 68 Study Locations
Sponsors and Collaborators
Study Director: Pfizer Call Center Pfizer
  More Information

Publications automatically indexed to this study by Identifier (NCT Number):
Responsible Party: Director, Clinical Trial Disclosure Group, Pfizer, Inc. Identifier: NCT00413010     History of Changes
Other Study ID Numbers: A0081103
Study First Received: December 15, 2006
Results First Received: February 27, 2009
Last Updated: December 3, 2009

Additional relevant MeSH terms:
Anxiety Disorders
Pathologic Processes
Mental Disorders
Sensory System Agents
Peripheral Nervous System Agents
Physiological Effects of Drugs
Calcium Channel Blockers
Membrane Transport Modulators
Molecular Mechanisms of Pharmacological Action
Anti-Anxiety Agents
Tranquilizing Agents
Central Nervous System Depressants
Psychotropic Drugs processed this record on September 21, 2017