This is a clinical trial assessing duloxetine and comparator to placebo in patients who have generalized anxiety disorder.

Official Title

A Comparison of Duloxetine Hydrochloride, Venlafaxine Extended Release, and Placebo in the Treatment of Generalized Anxiety Disorder


Generalised Anxiety Disorder

Study Type


Study Design

Treatment, Randomized, Double-Blind, Placebo Control, Parallel Assignment, Safety/Efficacy Study

Further Details

Primary Outcome Measures:

  • Assess whether duloxetine hydrochloride 60 to 120 mg QD is superior to placebo in the treatment of GAD, defined as statistically greater reduction in anxiety symptoms as measured by the HAMA.

Secondary Outcome Measures:

  • Self-reported anxiety symptomatology
  • Quality of Life
  • Clinical Global Improvement
  • HAMA factor scores

Study Start

April 2005; Study completion: January 2007

Eligibility & Criteria

  • Ages Eligible for Study: 18 Years and above
  • Genders Eligible for Study: Both

Inclusion Criteria:

  • Male and female outpatients at least 18 years of age, presenting with generalized anxiety disorder (GAD).

Exclusion Criteria:

  • Any current and primary Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition (DSM-IV) Axis I diagnosis other than GAD. Patients diagnosed with major depressive disorder within the past 6 months -or- patients diagnosed with panic disorder, post-traumatic stress disorder, or an eating disorder within the past year -or- obsessive-compulsive disorder, bipolar affective disorder, psychosis factitious disorder, or somatoform disorders during their lifetime
  • The presence of an Axis II disorder or history of antisocial behavior, which in the judgement of the investigator would interfere with compliance with study protocol
  • Have previously completed or withdrawn from this study or any other study investigating duloxetine or have previously been treated with duloxetine
  • History of alcohol or any psychoactive substance abuse or dependence (as defined in the DSM-IV-TR) within the past 6 months

Total Enrolment


Contact Details

  • Spring Hill, Queensland, 4000, Australia
  • Toowoomba, Queensland, 4350, Australia
  • Everton Park, Queensland, 4053, Australia
  • Armadale, Victoria, 3143, Australia

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