Stimulant medications are a class of drugs commonly prescribed to treat attention deficit hyperactivity disorder (ADHD) by enhancing the activity of certain neurotransmitters in the brain, particularly dopamine and norepinephrine. These medications help improve focus, attention, and impulse control in individuals with ADHD. The effectiveness of stimulant medications is often attributed to their ability to increase levels of these neurotransmitters, which play a crucial role in regulating attention and behavior.