There is research that shows magnesium helps with "resetting" your tolerance.

Here's the official study on nih.gov:
The effects of magnesium physiological supplementation on hyperactivity in children with attention deficit hyperactivity disorder (ADHD). Positive ... - PubMed - NCBI

It might be worth looking at magnesium. Plus, it's supposed to help with ADHD symptoms in general, as sometimes an insufficient amount of magnesium can exacerbate ADHD symptoms.

Hope you find that helpful