You will only notice a difference in focus/concentration levels when on the right medication and dosage for you. Dex may not be the right medication. There are two types of stimulants: amphetamine (Adderall, Vyvanse, Evekeo…) and methylphenidate (Ritalin, Concerta, Quillivant…). Almost everyone does well on one type or the other, but not both.
And medication alone is not enough. You still need strategies and coping skills for the most success.
ADDitude Community Moderator, Parenting ADHD Coach & Author, Mom to teen w/ ADHD, LDs, and autism