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Friday, August 19, 2016

Bupropion (Wellbutrin) for ADHD

Bupropion is typically not used for ADHD because there are many stimulants that are more effective and have a similar side effect profile.  However, it is preferred in certain situations, when the patient is struggling with hyperfocus on nonproductive activities (like screen time), addiction, binge eating, or depression, or if the patient hasn’t responded to other medications.

How well does it work?
Bupropion has been studied in a few smaller clinical studies.  A 2015 metanalysis concluded that while bupropion appeared to be modestly effective, further study was warranted.  In this same metanalysis, stimulants and atomoxetine were both found to be more effective than bupropion for ADHD.  Like most nonstimulants, bupropion does work all day once it starts to work, but it is usually several weeks after starting.

What are the side effects?
Bupropion has a well established track record in treating depression and nicotine dependence.  It has also been recently approved for treatment of binge eating disorder in combination with naltrexone.  Since it has been widely used for some time, the side effects and long term effects are relatively well known. 

One downside to bupropion is that its side effects are similar to the stimulants.  Anxiety, appetite problems, and insomnia (in about 40%) are common.  There are some case reports of tics being worsened by bupropion, but generally tics have not been reported as a common side effect.  However, bupropion is not habit forming.

The package label carries a black-box warning about possible increase in suicidal thinking.  This can be seen with antidepressant usage in depressed patients.  It is not seen in nondepressed patients who take bupropion to quit smoking.  No study has examined this issue in patients taking bupropion only for ADHD, as such, it is important to be aware of the possibility.

Pregnancy and Breastfeeding
Until recently, bupropion was considered pregnancy class B, safe in pregnancy.   However, newer rat studies suggested that birth defects could be possible, so it was changed to pregnancy category C, pregnancy risk unknown.  Typically drugs in category C are used only if the benefits outweigh the risks and there are no good alternatives.  For example, if you have ADHD that is severe enough to make you unable to function at work or at home, and you have a history of addiction to speed (i.e. you can’t take stimulants), bupropion may be the best choice for your ADHD, but you wouldn’t want to switch from Adderall (if it worked well and you were otherwise healthy) to bupropion with the thought that it might be safer.

Bupropion does enter the breastmilk in small quantities that would not be expected to cause problems for a nursing infant.  However, two case studies have reported seizures in infants of mothers taking bupropion and it is possible that the bupropion was responsible.  Currently, nursing mothers who are taking bupropion are counseled not to stop breastfeeding, but to inform their health provider if their child has unusual symptoms.

Cost
Unfortunately because it is used in treating nicotine addiction, it is often not covered by lower end insurance companies who don’t want to pay for something more expensive than nicotine patches for people trying to quit smoking.  It’s best to check with your insurance company and perhaps get your doctor to help with getting coverage if you need this medication.

Bottom line
Bupropion is a third line drug for ADHD for a good reason.  It isn’t as effective as the stimulants and has a similar side effect profile.  However, it is nonaddictive and does work for some people.  Additionally, it works all day and has antidepressant properties.    So it could be a good fit for a select group of patients who have failed treatment with stimulants, or who are unable to take them.

This article is part of a series on nonstimulants, including atomoxetine ( Strattera), clonidine (Kapvay), and guanfacine (Tenex, Intuniv).

References:
"Bupropion." LACTMED. US National Library of Medicine, 6 Nov. 2015. Web. 19 Aug. 2016.

Moses, Scott. "Family Practice Notebook." ADHD Medication. N.p., 9 Mar. 2013. Web. 10 July 2013.

Wellbutrin [package insert]. GlaxoSmithKline, Research Triangle Park, NC; March 2013. http://us.gsk.com/products/assets/us_wellbutrin_tablets.pdf.  Accessed May 28, 2013.

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