CClinicalTrials.gg
TerminatedNCT00658008Updated Nov 16, 2012

A 10-week Study Evaluating the Efficacy and Safety of PD 0332334 in Patients With Generalized Anxiety Disorder (1)

A Phase 3 interventional study of PD 0332334 and PD 0332334 in Generalized Anxiety Disorder, sponsored by Pfizer. Terminated at 52 sites in 5 countries. Open to participants aged 18 Years to 65 Years. Per ClinicalTrials.gov, last updated 2012-11-16.

Sponsored by Pfizer · Phase 3, Interventional, and Treatment

Why this study was terminated
Please see Detailed Description for termination reason.
Phase
Phase 3
Study type
Interventional
Enrollment
501
Allocation
Randomized
Ages
18 Years to 65 Years
Sex
All
01

Study summary

This is a 10-week trial that evaluates the efficacy and safety of PD 0332334 in subjects, ages from 18 to 65, with generalized anxiety disorder.

Read the detailed description

Termination reason: On February 23rd 2009, a decision to terminate further development for PD 0332334 was communicated to investigators in this study. The decision to terminate this study was not based on any safety concerns.

02

Conditions studied

  • Generalized Anxiety Disorder

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Keywords

  • PD 0332334 phase 3 pivotal trial
03

In context

Anxiety Disorders

4,868 studies on the registry are indexed under Anxiety Disorders; 1,390 are open to participants now.

This study's enrollment of 501 is above the median of 80 across 4,174 interventional studies indexed under Anxiety Disorders.

Browse Anxiety Disorders studies →

Lead sponsor

Pfizer is the lead sponsor of 3,244 studies on the registry; 139 are open to participants now.

Of its 582 completed or terminated interventional studies of FDA-regulated products, 381 (65%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 65 Years
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • Diagnosis of GAD (Diagnostic and Statistical Manual IV [DSM IV], 300.02) as established by the clinician (psychiatrist or licensed clinical psychologist) who has interviewed the subject using all sources of data including the Mini International Neuropsychiatric Interview (MINI) for DSM IV Axis I disorders and other clinical information. Subjects with specific phobia(s) (as defined in DSM IV) or dysthymic disorder will be allowed in the study.
  • Subjects must have a HAM A total score ≥20 at the screening (V1) and randomization (V2) visits. Subjects must also have a Covi Anxiety Scale score of ≥9 and a Raskin Depression Scale score ≤7 at the Screening (V1) visit to ensure predominance of anxiety symptoms over depression symptoms.

Exclusion criteria

Exclusion Criteria:

  • Subjects with evidence or history of clinically significant hematological, renal, endocrine, pulmonary, gastrointestinal, cardiovascular, hepatic, pancreatic, neurologic, active infections, immunological, or allergic disease (including drug allergies).
  • Any of the following current (within the past 6 months through the present) DSM-IV Axis I diagnosis: Major Depressive Disorder, Obsessive Compulsive Disorder, Panic Disorder, Agoraphobia, Posttraumatic Stress Disorder, Anorexia, Bulimia, Caffeine induced anxiety disorder, Alcohol or substance abuse or dependence unless in full remission for at least 6 months, Social Anxiety Disorder.
  • Any of the following past or current DSM-IV Axis I diagnoses: Schizophrenia, Psychotic disorder, Delirium, dementia, amnestic, and other clinically significant cognitive disorders, Bipolar or schizoaffective disorder, Cyclothymic disorder, Dissociative disorders.
  • Antisocial or borderline personality disorder.
  • Serious suicidal risk per the clinical investigator's judgment.
05

Study design

Phase
Phase 3
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Quadruple (Participant, Care provider, Investigator, Outcomes assessor)
Enrollment
501 participants (actual)

Study arms

  • Experimental
    PD 0332334 175 mg BID

    Drug: PD 0332334

  • Experimental
    PD 0332334 225 mg BID

    Drug: PD 0332334

  • Experimental
    PD 0332334 75 mg BID

    Drug: PD 0332334

  • Active comparator
    Paroxetine 20 mg QD

    Drug: Paroxetine

  • Placebo comparator
    Placebo BID

    Drug: Placebo

Interventions

  • DrugPD 0332334

    Capsules, oral, 175 mg BID, 8 weeks with 2 week taper

    Also known as: imagabalin

  • DrugPD 0332334

    Capsules, oral, 225 mg BID, 8 weeks with 2 week taper

  • DrugPD 0332334

    Capsules, oral, 75 mg BID, 8 weeks with 2 week taper

  • DrugParoxetine

    Capsules, oral, Paroxetine 20 mg QD, 8 weeks with 2 week taper

  • DrugPlacebo

    Capsules, oral, placebo bid, 8 weeks with 2 week taper

06

What researchers measure

Primary outcomes

  1. The efficacy of PD 0332334 in the treatment of GAD will be measured by the change in the Hamilton Anxiety Rating Scale (HAM-A) total scores from baseline observed following 8 weeks of double-blind treatment.

    Time frame: 8 weeks

  2. The safety and tolerability of PD 0332334 in subjects with GAD will be monitored in this study

    Time frame: 8 weeks

Secondary outcomes

  1. Worsening and improvement from baseline to week 8 on the changes in the Sexual Functioning Questionnaire (CSFQ)

    Time frame: 8 weeks

  2. Response rate on the patient-rated PGI-C at week 8

    Time frame: 8 weeks

  3. Change from baseline to week 8 on the Sheehan Disability Scale subscales

    Time frame: 8 weeks

  4. Change from baseline in the somatic subscale score of the HAM-A (items 7 - 13)

    Time frame: 8 weeks

  5. Response rate on the HAM-A at week 1 and week 8

    Time frame: 8 weeks

  6. Response rate on the clinician-rated CGI-I ate week 1 and week 8

    Time frame: 8 weeks

  7. Change from Baseline in the psychic subscale score of the HAM A (Items 1- 6 and 14) at Week 8

    Time frame: 8 weeks

  8. Change from Baseline to Week 1 on the Medical Outcomes Study Sleep Scale (MOS SS) Sleep Problems Index II

    Time frame: 1 week

  9. Change from Baseline to Week 8 on the Medical Outcomes Study Sleep Scale (MOS SS) Sleep Problems Index II

    Time frame: 8 weeks

  10. Change from baseline in the HAM-A total score at weeks 1, 2, 4, and 6

    Time frame: 6 weeks

  11. Change from baseline in the 17-item HAM-D total score at weeks 1, 2, 4, and 8

    Time frame: 8 weeks

  12. Change from Baseline to Week 8 on the Medical Outcomes Study Sleep Scale subscales

    Time frame: 8 weeks

  13. Remission rate based on the HAM A at Week 8

    Time frame: 8 weeks

  14. Change from baseline in CGI-S at week 8

    Time frame: 8 weeks

  15. Change from baseline to week 8 in the QLesQ General Activity Score

    Time frame: 8 weeks

  16. The "Week 1 Sustained Responder" rate based on the HAM A (where "Week 1 Sustained Responders" are defined as subjects with a 50% or greater improvement from baseline on the HAM A total score at Week 1 that is sustained until the Week 8 visit)

    Time frame: 1 week

  17. Change from Baseline to Days 2 8 and Weeks 2, 4, 6, 8 on the DAS A (total score)

    Time frame: 8 weeks

  18. Change from baseline to week 8 on the Sheehan Disability Scale (SDS) total score

    Time frame: 8 weeks

  19. Change from baseline to Days 2-8 and weeks 2, 4, 6 and 8 on the GA-VAS (diary)

    Time frame: 8 weeks

  20. Average (across the week 1, 2, 4, 6 and 8 visits) HAM-A change from baseline score

    Time frame: 8 weeks

07

Study locations

52 sites
  • Pfizer Investigational Site
    Litchfield Park, Arizona 85340, United States
  • Pfizer Investigational Site
    Costa Mesa, California 92626, United States
  • Pfizer Investigational Site
    Pasadena, California 91106, United States
  • Pfizer Investigational Site
    Redlands, California 92374, United States
  • Pfizer Investigational Site
    Denver, Colorado 80239, United States
  • Pfizer Investigational Site
    Norwich, Connecticut 06360, United States
  • Pfizer Investigational Site
    Altamonte Springs, Florida 32701, United States
  • Pfizer Investigational Site
    Maitland, Florida 32751, United States
  • Pfizer Investigational Site
    Miami, Florida 33126, United States
  • Pfizer Investigational Site
    Miami, Florida 33143, United States
  • Pfizer Investigational Site
    South Miami, Florida 33143, United States
  • Pfizer Investigational Site
    Terre Haute, Indiana 47802, United States
  • Pfizer Investigational Site
    Overland Park, Kansas 66212, United States
  • Pfizer Investigational Site
    Topeka, Kansas 66606, United States
  • Pfizer Investigational Site
    Shreveport, Louisiana 71104, United States
  • Pfizer Investigational Site
    Baltimore, Maryland 21208, United States
  • Pfizer Investigational Site
    Boston, Massachusetts 02135, United States
  • Pfizer Investigational Site
    St. Charles, Missouri 63301, United States
  • Pfizer Investigational Site
    Las Vegas, Nevada 89146, United States
  • Pfizer Investigational Site
    Clementon, New Jersey 08021, United States
  • Pfizer Investigational Site
    Willingboro, New Jersey 08046, United States
  • Pfizer Investigational Site
    Albuquerque, New Mexico 87109, United States
  • Pfizer Investigational Site
    Bronx, New York 10454, United States
  • Pfizer Investigational Site
    Bronx, New York 10467, United States
  • Pfizer Investigational Site
    Brooklyn, New York 11235, United States
  • Pfizer Investigational Site
    New York, New York 10023, United States
  • Pfizer Investigational Site
    Raleigh, North Carolina 27607, United States
  • Pfizer Investigational Site
    Toledo, Ohio 43609, United States
  • Pfizer Investigational Site
    Toledo, Ohio 43623, United States
  • Pfizer Investigational Site
    Bethany, Oklahoma 73008, United States
  • Pfizer Investigational Site
    Bala Cynwyd, Pennsylvania 19004, United States
  • Pfizer Investigational Site
    Media, Pennsylvania 19063, United States
  • Pfizer Investigational Site
    Norristown, Pennsylvania 19401, United States
  • Pfizer Investigational Site
    Philadelphia, Pennsylvania 19104, United States
  • Pfizer Investigational Site
    Philadelphia, Pennsylvania 19136, United States
  • Pfizer Investigational Site
    Columbia, South Carolina 29201, United States
  • Pfizer Investigational Site
    Memphis, Tennessee 38117, United States
  • Pfizer Investigational Site
    Austin, Texas 78756, United States
  • Pfizer Investigational Site
    Dallas, Texas 75231, United States
  • Pfizer Investigational Site
    Lake Jackson, Texas 77566, United States
  • Pfizer Investigational Site
    San Antonio, Texas 78229, United States
  • Pfizer Investigational Site
    Burlington, Vermont 05401, United States
  • Pfizer Investigational Site
    Charlottesville, Virginia 22903, United States
  • Pfizer Investigational Site
    Charlottesville, Virginia 22911, United States
  • Pfizer Investigational Site
    Waukesha, Wisconsin 53188-1660, United States
  • Pfizer Investigational Site
    Budapest, 1095, Hungary
  • Pfizer Investigational Site
    Budapest, 1137, Hungary
  • Pfizer Investigational Site
    Catania, 95123, Italy
  • Pfizer Investigational Site
    Torino, 10126, Italy
  • Pfizer Investigational Site
    Seoul, 135-710, Korea, Republic of
  • Pfizer Investigational Site
    Seoul, 138-736, Korea, Republic of
  • Pfizer Investigational Site
    Khotkovo, Moscow region, 142601, Russian Federation
08

References and documents

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Nov 16, 2012, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT00658008
Lead sponsor
Pfizer
Responsible party
Sponsor
First posted
Apr 14, 2008
Start date
Apr 2008
Primary completion
Mar 2009
Completion
Mar 2009
Last update
Nov 16, 2012

Study contacts

Pfizer CT.gov Call Center
study director · Pfizer

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

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This study is terminated, as verified in Nov 2012. You cannot join it, but the record below documents what was studied.

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