Efficacy of viloxazine ER (extended-release capsules; Qelbree®) for attention-deficit/hyperactivity disorder (ADHD) is attributed to its ability to increase extracellular norepinephrine and dopamine in the medial prefrontal cortex by inhibiting norepinephrine transporters (NET); however, studies also suggest potentially relevant activity at serotonin (5-HT) receptors. This positron emission tomography (PET) study in macaca fascicularis monkeys measured viloxazine binding to 5-HT2C/5-HT2A…
