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

University of California, San Diego27 enrolled

Overview

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).

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.

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

QUADRUPLE

Enrollment

Conditions

Generalized Social Phobia

Interventions

atomoxetineDRUG

Flexible dose, up to 50 mg per day

placeboDRUG

placebo (matching to atomoxetine)

Eligibility

Sex: ALLMin age: 18 YearsMax age: 65 Years

Medical Language ↔ Plain English

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

Outcomes

Primary Outcomes

Clinical Global Impression (Change Version, Also Known as Improvement Version)

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".

Time frame: 10 weeks (end of study)

Data from ClinicalTrials.gov

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