The effectiveness of caffeine for ADHD depends on the dosage. Moderate doses between 200-300 mg can lead to increased energy, enhanced concentration, and boost emotional well-being. High doses, however, of greater than 400 mg can cause you to feel jittery and nervousness. [4] X Trustworthy Source PubMed Central Journal archive from the U. S. National Institutes of Health Go to source

However, those who intake a lot of caffeine run the risk of having the shakes and the increased possibility of a heart attack. Remember that large amounts of caffeine have been proven to be ineffective. Limited quantities (between 200 and 300 mg) work best at helping you to manage ADHD.

If you or your child have ADHD, try getting regular exercise, in virtually any form, to see if it helps. Even if the effects are minimal, people who work out regularly still report feeling better about themselves and healthier. [14] X Trustworthy Source Child Mind Institute Nonprofit organization providing evidence-based care for children with mental health and learning disorders and their families Go to source

The best tactics to improve sleep quantity and quality lie in developing a regular and consistent sleep pattern. Create a relaxing bedroom environment, and move all other activities elsewhere. Avoid caffeine or alcohol in the evenings for better sleep, too.