Strattera does increase dopaminergic activity, just not in the mesolimbic dopamine pathway (which deals with euphoria). Also, given the structural similarity of dopamine to nor/epinephrine, when the levels of one of them rise, so do levels of the other, though not always to a significant level.
It's also not dopamine by itself that makes a drug addictive. Levodopa is given to people with parkinson's disease, but it's not recreational.
Try meditation.
As for pharmaceuticals, there are several drugs used for ADHD that aren't considered addictive. Wellbutrin (you might want to stay away from this one), Strattera, Intuniv, Effexor, and Pristiq are some.