While the data on the efficacy of stimulants in adult ADHD is robust, we have had numerous calls to the PCL program from providers seeking information on medications that have a lower misuse and abuse potential.
Atomoxetine has an FDA indication for adult ADHD. Atomoxetine is often thought of as the first-line medication for adult ADHD in patients with a history of substance use disorder. There are several studies that demonstrate an improvement in quality of life ratings, for example, with longer term use in patients with ADHD. Atomoxetine selectively inhibits norepinephrine reuptake and medications with this mechanism of action convey a risk of psychosis and mania, especially in patients with a personal or family history of bipolar disorder or psychosis. Like many medications with an antidepressant-like mechanism of action, atomoxetine has a black box warning for increased suicidality in children, adolescents and young adults.
Bupropion does not have an FDA indication for ADHD, though there are meta-analyses that suggest it has some utility. Bupropion is FDA-approved for major depressive disorder. The symptom of poor concentration can be magnified when patients with ADHD experience a major depressive episode. For some of these patients, bupropion might help both disorders. Providers should keep in mind, however, that bupropion is not effective for anxiety disorders. Moreover, some patients with anxiety disorders find that bupropion worsens their anxiety symptoms. Like atomoxetine, bupropion has a black box warning for suicidality in patients under the age of 25. Bupropion can also cause mania and psychosis, particularly in patients with a personal or family history of bipolar disorder or psychosis. Bupropion can increase the risk of seizure and is contraindicated in patients with eating disorders.
While guanfacine has an FDA indication for pediatric ADHD, it does not have an FDA indication for adult ADHD. Some authors are pessimistic about its utility in adult ADHD. Overall, the data is mixed and there have only been a few controlled studies, though research is actively being done and the efficacy (or lack thereof) of guanfacine in adult ADHD may be more clearly articulated in the next few years. Guanfacine is an alpha-2 agonist that is used to treat hypertension and thus it has a unique side effect profile compared to atomoxetine or bupropion.
If you are considering using any of the medications discussed above, please first review your own reference material for full details on side effects, dosing, adjustment in the setting of renal or hepatic impairment, cautions/contraindications, monitoring requirements, and safety in pregnancy and lactation. We most often use Micromedex, UpToDate, or Epocrates. Additionally, there are free databases available to Washington State providers at https://heal-wa.org/professions/. You can also call the Psychiatry Consultation Line (877-927-7924) for clinical advice on using these medications in the treatment of adult ADHD as well as assessment, treatment decisions and monitoring of mental health conditions in general. Even in complicated clinical scenarios, discussing a patient’s care with a colleague can lead to a path forward.
Author
Ryan Kimmel, MD
Professor, University of Washington School of Medicine, Department of Psychiatry and Behavioral Sciences
Chief of Psychiatry, University of Washington Medical Center
Medical Director, Psychiatry Consultation Line
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Presenter: Robert Sise, MD, MBA, MPH
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*The UW Psychiatry and Addictions Case Conference series (UW PACC) is a free, weekly teleconference that connects community providers with UW Medicine psychiatrists and addictions experts. Sessions include both an educational presentation on an addictions or psychiatry topic and case presentations where providers who participate receive feedback and recommendations for their patients.