People with ADHD, or attention-deficit/hyperactivity disorder, can face a number of challenges when it comes to finances, which can include impulse spending. The first, and arguably most significant, is that people with ADHD tend to have lower levels of a neurotransmitter called dopamine. Dopamine acts as a reward system in the brain, helping people experience pleasure and motivation. Those with low dopamine levels often need higher levels of stimulation and may seek it out in unhealthy ways. As a result, folks with ADHD may find themselves seeking pleasure via instant gratification and impuls…