https://www.healthline.com/health/adhd/how-do-adderall-and-meth-methamphetamine-differ#differences

In this article, it’s made clear how there is a legal meth medication for ADHD and the doctors note that that “They are very similar medications. Their chemical structure is almost the same”.

Meth and Adderall are not always chemically identical, but their makeup and effects are very similar and their difference is largely in how much amphetamine is prescribed and how it’s used and how poorly it is manufactured and regulated.

If accurate medical information causes you to stigmatize others, you’ll have to reexamine your own beliefs after learning more.