Updated: 14:29, Friday December 6, 2013
A psychology researcher is trying to work out if there is a way to provide customised medication for people with ADHD.
The key to the study is the strong genetic link to the disorder and the high risk of substance abuse.
Queensland University of Technology's Dr Melanie White is also looking at whether giving a young person stimulants such as Ritalin results in the brain responding differently to drugs and alcohol later in life.
She says adult sufferers of ADHD are two to three times more likely to experience substance abuse or dependence than other people.
Dr White is looking for Australian adults with ADHD to participate in her study.