Aldous Huxley predicts Adderall and champions alternative therapies

amphetamines feel a lot like people putting NO2 on their cars, or overclocking their computers. You might just fine in the end, but the likelihood of wear & tear catching up to you increases. It should be treated just like any other medicine, don't use it unless you really have to, and expect adverse effect (known or unknown).

To continue the analogy, a Dodge Challenger with a 50-shot of nitrous on it that gets used once a day is gonna still come out looking better at any milage/age than the same engine in a Promaster van because you can't drive around at 17k gross in a Challenger so the area under the abuse curve is way lower even if it peaks ever so slightly higher.

An office worker on meth-lite (or whatever you want to call it) is still accumulating less wear and tear than a laborer, something the human body is clearly capable of being for a lifetime if you're somewhat smart about it.

Adderall, caffeine, heck cocaine based stimulants, are probably all fine if you're not over-using the living crap out of them and stacking large amounts of them on top of other things that'll beat the body up over time.