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It was found to have very little effects on dopamine, primarily in rats. In humans the dopaminergic effects are so little as to be none. It primarily affects the reuptake of noradrenaline, and takes about 2 weeks to work IF it works for you. According to a study (found through Wikipedia, redirected to a journal so take it with a grain of salt), 40% of adults experience good results with attention problems. It’s still a second line treatment though. If you want to, or can, get some addy