Effects of Atomoxetine Treatment in Humans

Study Overview
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Brief Summary
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A total of 18 healthy volunteers will participate in this four-week, within-groups, double-blind, placebo-controlled study. The study has two phases separated by a 4 to 15-day washout period. Subjects will be randomly assigned to receive either 40 mg atomoxetine or placebo. For Phase I, subjects will be assigned to atomoxetine or placebo for 4 days. After receiving medication or placebo for three days, subjects will have a 6-hour laboratory session, where responses to physical and psychological stress of a 20 mg/70 kg (20 mg maximum) dose of d-amphetamine will be measured. Several physiological, hormonal, and subjective outcome measures will be obtained during the experimental sessions. Subjects will then have a 4-15 day washout period and will be crossed over to the alternative treatment for Phase II.

Detailed Description
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Objective: This pilot study will examine the effects of a norepinephrine reuptake blocker, atomoxetine, on physiological and subjective responses to physical and psychological models of stress and oral amphetamine in healthy volunteers. The physical stress model will be the cold pressor test (CPT) and the psychological stress will be the paced auditory serial addition task (PASAT). Our overall hypothesis is that atomoxetine treatment, compared to placebo, will attenuate the physiological and subjective responses to stress and d-amphetamine. 2. Research Design: Double-blind, placebo-controlled, within-groups, outpatient study. 3. Methodology: A total of 18 healthy volunteers will participate in this four-week, within-groups, double-blind, placebo-controlled study. The study has two phases separated by a 4 to 15-day washout period. Subjects will be randomly assigned to receive either 40 mg atomoxetine or placebo. For Phase I, subjects will be assigned to atomoxetine or placebo for 4 days. After receiving medication or placebo for three days, subjects will have a 6-hour laboratory session, where responses to physical and psychological stress of a 20 mg/70 kg (20 mg maximum) dose of d-amphetamine will be measured. Several physiological, hormonal, and subjective outcome measures will be obtained during the experimental sessions. Subjects will then have a 4-15 day washout period and will be crossed over to the alternative treatment for Phase II. 4. Findings: A total of 10 subjects have completed this study. This study has been published.

Official Title
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Effects of Atomoxetine Treatment in Humans

Conditions
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Stress

Intervention / Treatment
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* Drug: Placebo
* Drug: Atomoxetine


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Female and males, age 18 to 45 years Current history of good health and normal ECG For women: not pregnant as determined by pregnancy screening, nor breast feeding, and using acceptable birth control methods. Exclusion Criteria: History of heart disease, hypertension, renal or hepatic diseases, glaucoma, hyperthyroidism, or other medical conditions that the physician investigator deems as contraindicated for the patient to be in the study Current use of psychotropic medication(antidepressants, antipsychotics, or anxiolytics) and/or diagnosis and treatment for Axis I disorders including major depression, bipolar affective disorder, schizophrenia and panic disorder within the past year. Current dependence on alcohol or on drugs or treatment for drug or alcohol addiction(amphetamines have greater abuse liability among those with drug addictions) within the past 5 years.

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 45 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: Double


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Placebo Comparator: 2<br>Second arm is placebo | Drug: Placebo<br>* Placebo<br>|
| Experimental: 1<br>One arm is atomoxetine 40 mg per day | Drug: Atomoxetine<br>* 20mg maximum of d-amphetamine<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Measuring subjective responses to physical and psychological models of stress and oral amphetamine in healthy volunteers. |  | one year | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Atomoxetine, Stress, d-amphetamine