[godelski]

It's worth mentioning that people who take Adderall medicinally are taking substantially lower dosages than those who take it recreationally. Medicinal users take on average 20mg and can have dosages down to 5mg where a recreational user is taking 40mg and maybe up to 100mg. Sure, Adderall can cause the things you mentioned, but the same is actually true about sugar (a highly addictive substance, high potential for abuse, and limited medical usage).

These bins are arbitrary and dosage matters. It would be perfectly acceptable for the FAA to require 3 months of usage, at a specific dose, wherein a pilot is stable on their meds and an FAA doctor (which they must visit anyways) approves them. You can get a good idea of risk factors and stability by doing this.