Yes, if it feels like the medication stopped working, you should talk with the prescribing doctor. They may increase the dose or change medication. Keep a daily journal to track what she eats and how much sleep she’s getting. There could be an explanation for the change and journaling consistently can hell you find it.
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Penny
ADDitude Community Moderator, Author & Mentor on Parenting ADHD, Mom to teen w/ ADHD, LDs, and autism