Atomoxetine Treatment for ADHD and Marijuana Dependence

This study has been completed.
Information provided by (Responsible Party):
Aimee McRae-Clark, Medical University of South Carolina Identifier:
First received: August 2, 2006
Last updated: April 23, 2013
Last verified: April 2013

The aim of the study is to determine if atomoxetine treatment combined with motivational enhancement therapy is effective in reducing marijuana use in adult individuals with attention-deficit hyperactivity disorder and marijuana dependence.

Condition Intervention Phase
Marijuana Abuse
Attention Deficit Disorder With Hyperactivity
Drug: Atomoxetine
Procedure: Motivational enhancement therapy
Phase 2

Study Type: Interventional
Study Design: Allocation: Randomized
Endpoint Classification: Safety/Efficacy Study
Intervention Model: Parallel Assignment
Masking: Double Blind (Subject, Investigator)
Primary Purpose: Treatment
Official Title: Atomoxetine Treatment for ADHD and Marijuana Dependence

Resource links provided by NLM:

Further study details as provided by Medical University of South Carolina:

Primary Outcome Measures:
  • Estimated Week 12 Self-reported Use [ Time Frame: One week (study week 12) ] [ Designated as safety issue: No ]
    Participants' self-report of mean frequency of use of marijuana during week 12 of the study was assessed using a Time-Line Follow-Back.

Secondary Outcome Measures:
  • Self-reported Longitudinal Use [ Time Frame: 12 weeks ] [ Designated as safety issue: No ]
    Participants' self-report of mean frequency of use of marijuana from baseline through week 12 visit of the study was assessed using a Time-Line Follow-Back.

  • Urine Drug Screens [ Time Frame: 12 weeks ] [ Designated as safety issue: No ]
    Urine drug screen (UDS), positive or negative for marijuana

  • Wender-Reimherr Adult Attention Deficit Disorder Scale [ Time Frame: Baseline and Week 12 ] [ Designated as safety issue: No ]
    The WRAADDS is intended to measure the severity of ADHD symptoms in adults. It measures symptoms in seven categories: attention difficulties, hyperactivity/restlessness, temper, affective lability, emotional over-reactivity, disorganization, and impulsivity. The scale rates individual items from 0-2 (0=not present, 1=mild, 2=clearly present), with a minimum score of 0 and maximum score of 46. Reported here is change from Baseline to Week 12 (or LOCF).

  • Clinical Global Impression, Improvement Scale [ Time Frame: 12 weeks ] [ Designated as safety issue: No ]
    The Clinical Global Impression - Improvement scale (CGI-I) was used to assess improvement in ADHD symptoms during study participation. 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.

Enrollment: 38
Study Start Date: November 2005
Study Completion Date: June 2008
Primary Completion Date: June 2008 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: A
Drug: Atomoxetine
25 to 100 mg daily
Procedure: Motivational enhancement therapy
Three sessions
Placebo Comparator: B
Procedure: Motivational enhancement therapy
Three sessions


Ages Eligible for Study:   18 Years to 65 Years
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  1. Healthy men and women, 18 to 65 years of age
  2. Meet DSM-IV criteria for marijuana dependence
  3. Meet DSM-IV criteria for current ADHD, determined by a clinical interview and confirmed by semi-structured interview with the Conners' Adult ADHD Diagnostic Interview for DSM-IV (CAAR-D; Conners et al, 1999)
  4. ADHD symptom severity indicated by a score of 12 or greater on the Wender-Reimherr Adult Attention Deficit Disorder Scale
  5. ADHD symptoms must be corroborated by a second informant on either current symptoms (by a significant other or close friend) or childhood symptoms (by a parent or older sibling)
  6. All subjects will agree to and sign a written, IRB-approved informed consent
  7. Subjects must live within a 60-mile radius of Charleston, SC, to facilitate study visit compliance

Exclusion Criteria:

  1. Individuals meeting DSM-IV dependence for a substance other than marijuana with the exception of nicotine and caffeine. Dependence on nicotine and caffeine will be allowed since dependence on these substances commonly co-occurs with marijuana dependence and excluding these individuals would compromise study recruitment
  2. Individuals meeting DSM-IV criteria for a lifetime history of schizophrenia or another non-affective psychotic disorder or bipolar disorder, since these patients will most likely be taking other psychotropic medications and often require intensive psychiatric care
  3. Individuals meeting DSM-IV criteria for current major depressive disorder or eating disorder, since these individuals will likely require treatment with psychotropic medications. Subjects may meet criteria for a minor mood disorder (dysthymia) and for anxiety disorders. The inclusion of subjects with these disorders will be allowed as they commonly co-exist among patients with marijuana dependence (Stephens et al, 1993)
  4. Individuals who present significant suicidal risk
  5. Individuals with significant cognitive impairment as measured by a score of less than 26 on the Mini-Mental Status Exam, as they may be unable to understand the informed consent, comply with study protocol, or accurately complete assessments
  6. Individuals currently receiving stimulants, benzodiazepines, antidepressant or antipsychotic medications, as these medications could confound the effects of atomoxetine treatment
  7. Individuals currently receiving psychotherapy focusing on reducing marijuana use or on ADHD symptoms, as this could confound the effects of atomoxetine treatment. Participation in 12-step programs will be allowed
  8. Pregnant or nursing women, or women who refuse to use adequate birth control, as atomoxetine has not been approved for use in pregnancy
  9. Individuals without stable housing, as contacting these individuals would be difficult
  10. Individuals with major medical illnesses (e.g., HIV, renal failure, unstable angina, chronic obstructive pulmonary disease, infectious hepatitis)
  11. Patients with hypertension (defined as having blood pressure greater than 140/90 measured on 3 or more occasions), as atomoxetine treatment can be associated with increases in blood pressure
  12. Patients with evidence of hepatic insufficiency, as atomoxetine requires hepatic metabolism
  13. Patients with urinary hesitancy or urinary hesitation, as atomoxetine has been associated with some urinary hesitation in clinical trials
  14. Individuals who, in the investigators' opinion, would not be able to comply with study procedures, such as individuals unable to reliably present for intake appointments
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Please refer to this study by its identifier: NCT00360269

United States, South Carolina
Medical University of South Carolina
Charleston, South Carolina, United States, 29425
Sponsors and Collaborators
Medical University of South Carolina
Principal Investigator: Aimee L McRae, PharmD Medical University of South Carolina
  More Information

No publications provided

Responsible Party: Aimee McRae-Clark, Associate Professor of Psychiatry, Medical University of South Carolina Identifier: NCT00360269     History of Changes
Obsolete Identifiers: NCT00227851
Other Study ID Numbers: R21DA018221, R21DA018221
Study First Received: August 2, 2006
Results First Received: November 7, 2011
Last Updated: April 23, 2013
Health Authority: United States: Federal Government

Additional relevant MeSH terms:
Attention Deficit Disorder with Hyperactivity
Marijuana Abuse
Attention Deficit and Disruptive Behavior Disorders
Chemically-Induced Disorders
Mental Disorders
Mental Disorders Diagnosed in Childhood
Nervous System Diseases
Neurologic Manifestations
Signs and Symptoms
Substance-Related Disorders
Adrenergic Agents
Adrenergic Uptake Inhibitors
Molecular Mechanisms of Pharmacological Action
Neurotransmitter Agents
Neurotransmitter Uptake Inhibitors
Pharmacologic Actions
Physiological Effects of Drugs processed this record on October 23, 2014