Well, I said "too quickly". You have to address tolerance for all drugs in this space, but some are ridiculous. I couldn't even feel the Modafinil on day 3 wit

Well, I said "too quickly". You have to address tolerance for all drugs in this space, but some are ridiculous. I couldn't even feel the Modafinil on day 3 without taking 5x the dose. That's a bit silly. Instant release amphetamine ends up being more like a party drug for the same reason, though less extreme. Compare that to a slow release amphetamine (prodrug) like Vyvanse where most people can hit a 2+ week cycle of constant use, or an indefinite cycle by only dosing a fraction of the week.