Head-to-head comparisons of medication uses, side effects, warnings, and more.
Key takeaways
Guanfacine ER (Intuniv) and atomoxetine (Strattera) are both non-stimulant medications used to treat ADHD, but they work in different ways. Guanfacine ER is an alpha-2A agonist that lowers norepinephrine levels in the brain, while atomoxetine is a selective norepinephrine reuptake inhibitor that raises norepinephrine levels. Guanfacine ER is only approved for children ages 6 to 17, whereas atomoxetine can be used by both children and adults. Guanfacine ER is typically taken once daily and is available as a lower-cost generic, while atomoxetine can be taken once or twice daily and is also available as a generic. Common side effects of guanfacine ER include sleepiness and tiredness, whereas atomoxetine can cause nausea, dry mouth, and low appetite. Additionally, atomoxetine has more serious risks, such as suicidal thoughts and severe liver damage, which are not associated with guanfacine ER.
Intuniv (guanfacine ER)
Atomoxetine (Strattera)
Intuniv (guanfacine ER)
Atomoxetine (Strattera)
Summary of Intuniv vs. Strattera
Summary for Alpha 2A-adrenergic receptor agonist
Prescription only
Intuniv (guanfacine extended release) is used to treat attention-deficit hyperactivity disorder (ADHD) in kids ages 6 to 17 years old. It's not a controlled substance and can be used instead of stimulant medications for ADHD. Intuniv (guanfacine ER) belongs to the drug class called alpha-2A agonists. It comes as a tablet that you take by mouth once a day, either in the morning or at bedtime. Common side effects include sleepiness and tiredness. Taking it in the evening might help with these side effects. Intuniv (guanfacine ER) comes as brand-name and generic versions.
Summary for Selective norepinephrine reuptake inhibitor
Prescription only
Atomoxetine, also known by its brand name Strattera, is a non-stimulant medication. It's used to treat attention-deficit hyperactivity disorder (ADHD) in adults and children ages 6 years and up. Atomoxetine (Strattera) comes as capsules that are swallowed whole. You take your dosage either once or twice a day. Side effects are stomach upset and low appetite. It's not a controlled substance like some ADHD medications are. But atomoxetine (Strattera) still has a few serious risks like behavioral changes and heart problems.