> What you may be referring to is that Adderall, methamphetamine, and MDMA have remarkably similar effects, which is true - the active ingredients in all three are metabolized in a similar manner, and the main differences are the means of ingestion, the bioavailability, and set/setting.

Precisely. I'll add a clarifying edit now that two people have interpreted my statement differently than intended..

https://news.ycombinator.com/item?id=5321935