It was suggested in a recent review capturing animal model studies that caffeine may help manage cognitive symptoms, such as deficits in attention, learning, and memory, in individuals with ADHD. The results on hyperactivity and impulsiveness were ambiguous suggesting that it may not be suitable for ADHD with these symptoms. 

Study researcher, Javier Vazquez said that since there are not too many rugs available for therapy of ADHD, certain medications and stimulants are laced with confusion about being used in childhood adolescence. This study on caffeine becomes valuable for patients with ADHD. 

The results suggested that caffeine could be used to treat individuals with ADHD whose symptoms mainly involve attentional deficits, but further studies are needed to validate these results in human studies. (ADHD: Could caffeine treat some symptoms? (medicalnewstoday.com))