There are some other biological process that play into the efficacy of ADHD medication. You may have another issue that’s causing the medication to not meet the approximate DOE.
Of course, talk with your doctor about it. There are so many other stimulants on the market — it may be time to try something different to see if it will work better for you.
ADDitude Community Moderator, Author & Mentor on Parenting ADHD, Mom to teen w/ ADHD, LDs, and autism