For ADHD, stimulants like Ritalin have the opposite effect. Your brain goes... quiet. In a really good way. You can focus on what you want to, with ease. If you have a diagnosis don't be afraid of exploring medical treatment. Just be aware that while it does solve the problem of being able to stay focused and on task, it does not solve the problem of figuring out what to focus on. Also some people react differently to different medications. If Ritalin doesn't work, Elvanse or one of the others might work better. It can take some trial and error to figure out.
I want to add, try starting with lowest dose! For me 3.1mg Adzenys or 10mg Vyvanse (both lowest dose possible) have a clearly noticeable and beneficial effect without overriding my core personality and preferred mental tendencies (though this along with a low/moderate dose of NDRI and SSRI)
