J Clin Psychiatry/The Mixed Opioid Receptor Antagonist Naltrexone Mitigates Stimulant-Induced Euphoria: A Double-Blind, Placebo-Controlled Trial of Naltrexone
http://www.psychiatrist.com/JCP/article/Pages/2018/v79n02/17m11609.aspx
Adding 50mg Naltrexone to ADHD medicines reduces the risk they are going to be abused and that they will cause euphoria. Seems like a great idea, if you are giving patients stimulants and worry about overuse or diversion.
I might consider it a reasonable strategy for ADHD and addiction, too.