So when I was at school I was on something like 20mg of Ritalin (0.02g) twice a day via a pill that was digested by my stomach. Even that lead to issues with diet and sleep and anxiety.

Whereas if we're at a rave we'll happily share 1g+ (say between 2 of us which is 12x the amount) of amphetamine between a few of us and put that shit right up our noses so it's absorbed super quick.

The comedown from that is more just a feeling of absolute terror (AKA speed comedown psychosis. I try to mostly avoid it now because it can't be doing me or my mind much good).

I'm far more interested in nootropics over stimulants. E: Just ordered some Noopept so I'll get back to you.

As far as sleep goes I find that it is about the same with or without it since I tend to self medicate with caffeine but I generally go to sleep at as semi-regular time of the night (I say this as I write this from bed). The biggest blocker for sleep for me is getting excited about stupid programming things right before bed and that tends to happen with or without stimulants.

Without Ritalin I seem to be more anxious but its hard to really evaluate that objectively.

You are correct about the comedown from an amphetamine binge being awful. Thankfully, most business professionals and working people aren't dosing like they're at TomorrowLand.

There's only one "amphetamines". There is a specific molecule (and its enantiomer) called " amphetamine". There are some other amphetamine-class drugs like methamphetamine (crystal meth) and MDMA (ecstasy). Methylphenidate (Ritalin) isn't even an amphetamine-class drug.