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Efficacy and Tolerability of Atomoxetine (Strattera) in Adult Patients With Generalized Social Anxiety Disorder

This study has been completed.
Eli Lilly and Company
Information provided by (Responsible Party):
Murray B. Stein, University of California, San Diego Identifier:
First received: November 29, 2005
Last updated: May 19, 2016
Last verified: May 2016
The purpose of this study is to determine the effectiveness and tolerability of atomoxetine (Strattera) in adult patients with generalized social anxiety disorder (an anxiety disorder characterized by a fear of interpersonal interactions).

Condition Intervention Phase
Generalized Social Phobia Drug: atomoxetine Drug: placebo Phase 2 Phase 3

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: Double Blind Placebo Controlled Parallel Group Comparison of Atomoxetine (Strattera) for Generalized Social Anxiety Disorder (GSAD)

Resource links provided by NLM:

Further study details as provided by Murray B. Stein, University of California, San Diego:

Primary Outcome Measures:
  • Clinical Global Impression (Change Version, Also Known as Improvement Version) [ Time Frame: 10 weeks (end of study) ]

    This is a commonly used, clinician-rated measure of clinical improvement.

    The Clinical Global Impression - Improvement scale (CGI-I) is a 7 point scale that requires the clinician to assess how much the patient's illness has improved or worsened relative to a baseline state at the beginning of the intervention. and rated as: 1, very much improved; 2, much improved; 3, minimally improved; 4, no change; 5, minimally worse; 6, much worse; or 7, very much worse.

    For purposes of analysis, subjects rated as "(1) Very Much Improved" or "(2) Much Improved" were considered "responders".

Enrollment: 27
Study Start Date: November 2005
Study Completion Date: July 2008
Primary Completion Date: July 2008 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: 1
Drug: atomoxetine
Flexible dose, up to 50 mg per day
Other Name: Strattera
Placebo Comparator: 2
Drug: placebo
placebo (matching to atomoxetine)

Detailed Description:
Controlled studies show that approximately 50% of patients with generalized social anxiety disorder(GSAD)will respond to treatment with available pharmacotherapeutic agents such as SSRI's. This still leaves 50% that respond partially or not at all. Those who do respond, often experience adverse events (e.g., sexual dysfunction), which leads them to discontinue treatment. Thus, there is a strong rational for identifying alternatives to SSRI's that are effective with fewer side effects (or with a different side-effect profile, that features less sexual dysfunction)for the treatment of GSAD. Available data demonstrate that sustained-release venlafaxine, a dual reuptake inhibitor, is also effective for GSAD.(Stein et al., 2005). It is unclear from these studies whether serotonin reuptake is integral to efficacy for social anxiety disorder, or whether norepinephrine reuptake will convey similar efficacy. Atomoxetine (Strattera)an inhibitor of the presynaptic norepinephrine transporter, is an ideal candidate to address both these issues.

Ages Eligible for Study:   18 Years to 65 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Men and Women, ages 18-65, in good general health
  • Meet DSM-IV criteria for Social Anxiety Disorder

Exclusion Criteria:

  • Pregnant or breastfeeding
  • Narrow angle glaucoma
  • Any uncontrolled medical condition or any medical condition which would represent a contraindication to atomoxetine (Strattera) pharmacotherapy (e.g., hepatic insufficiency, untreated hypertension, untreated cardiovascular or cerebrovascular disease)
  • Any concomitant non-psychotropic medications that the physician determines are a contraindication to atomoxetine (Strattera) pharmacotherapy (e.g., Albuterol, various pressor agents)
  • Bipolar disorder, or any psychotic or organic mental disorder or dementia
  • Current substance abuse or dependency
  • Current active suicidal ideation
  • Current use of herbal psychoactive treatments such as St. John's Wort
  • Concurrent psychotropic medication is not permitted for 2 weeks prior to randomization (4 weeks in the case of fluoxetine) or at any point thereafter.
  • Receipt of formal psychotherapy concurrently
  • Inability, in the investigator's opinion, to comply with study procedures or assessments
  Contacts and Locations
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Please refer to this study by its identifier: NCT00260533

Sponsors and Collaborators
University of California, San Diego
Eli Lilly and Company
Principal Investigator: Murray B Stein, M.D. University of California, San Diego
  More Information

Additional Information:
Responsible Party: Murray B. Stein, Professor, University of California, San Diego Identifier: NCT00260533     History of Changes
Other Study ID Numbers: 040100
Study First Received: November 29, 2005
Results First Received: June 13, 2012
Last Updated: May 19, 2016

Additional relevant MeSH terms:
Anxiety Disorders
Phobic Disorders
Mental Disorders
Atomoxetine Hydrochloride
Adrenergic Uptake Inhibitors
Neurotransmitter Uptake Inhibitors
Membrane Transport Modulators
Molecular Mechanisms of Pharmacological Action
Adrenergic Agents
Neurotransmitter Agents
Physiological Effects of Drugs processed this record on August 18, 2017