ADHD memes

I came across a post on Reddit where a commenter implied they were using non-prescription drugs to manage their ADHD when they couldn't get a stimulant prescription for whatever reason.

Nobody would name the drug(s) for fear of being banned. From context it seemed some people were talking about a stimulant, and others marijuana. What might the stimulant be? Meth? If so, how would you dose that, and would it actually work?

I'm just curious, not intending to try it myself. I can get a prescription easily enough, and I have no desire to put myself in legal jeopardy. I am wondering if the meth version of amphetamine would work better, about the same, or not as well, though. I don't know the effects first-hand, but if it's anything like cocaine (I was an adult in the late 80s when coke was more popular), it doesn't seem like it would be helpful.