According to TC not necessarily disqualifying in Canada either -
"4.3 Requirements to be considered for certification
(1) In order to be considered for aviation medical certification, applicants with a suspected or previously confirmed diagnosis of ADHD (e.g. remote childhood diagnosis) and/or who were previously treated with a medication used to treat ADHD must be stable, functional, and no longer meet DSM 5 diagnostic criteria for ADHD after being assessed a minimum of 6 months after discontinuing medications used to treat ADHD.
ref -
https://www.pilotmd.ca/wp-content/up...23/07/ADHD.pdf