It appears to be cardiotoxic, working like a Tricyclic Antidepressant (TCA), yet less so than imipramine.
It works by increasing levels of norepinephrine, altering some serotonin transmission, and maybe reducing some neurotransmitter release in the frontal cortex by increasing certain GABA receptors.
I wonder how well this drug will work in real life for children with ADHD...time will tell, and psychiatrists will give us their opinion.