Many people with ADHD have experienced improvement in symptoms after identifying and eliminating "trigger" foods. "Triggers" can be different for everybody and even "healthy" foods can be triggers. If anyone's interested in learning more, I have some info about food sensitivities on my website (I'm a Registered Dietitian specializing in food sensitivities) - https://www.getwellified.com/. I know it's tough dealing with a condition like this, especially in kids, but there are other options out there that might help.