AMP citrate is very good for gruesome/grinding work - removal of emotions, increased attention, serious dark mood, decrease in appetite ( stops you for lurking around the fridge), you basically don't want to talk to anyone and only want to do work.
IME its way better than craze for working, but you have to be careful when taking it as its removal of emotions will take all the fun and love from you, and can make you a very unpleasant person. It also has the effect of making you unable to sleep, so don't take it in later afternoon.
my only complaint is its often stacked with high dose caffeine (which kicks in too early compared to AMP citrate, but also makes it too much of a go up and down experience). It's duration is also extremely limiting, with re doses required every 3 hours.
Some preworkout supplements on my radar are, prodigy, san launch reloaded, VPX redline white heat.
I have a pretty decent stack, but I really need to be able to stay focused more hours, previously I was using a special mix of lucozade (called mental XTRA) which you can only buy in Hong Kong and it has phenomenal focus effects (though ordinary ingredients, so I have no idea why it was so strong, 6 sips of this stuff will get you going), this thing has gone out of stock for a while leaving me in the dark, so i'm looking for a replacement.
Raising NO has been an interesting thing to look at. I think raising NO could potentially have some good effects for ADHD, low NO is prevalent in pure ADHD (Can we just say impaired pre frontral cortex function, because I like that term alot than ADHD). http://www.ncbi.nlm....pubmed/16763377
Nitric oxide levels in disruptive behavioral disorder.
Abstract
There are various evidences of the role of nitric oxide (NO) in several neuropsychiatric disorders. However, there is no clinical study which investigated the role of NO in disruptive behavioral disorders (DBD). The aim of this study is to investigate the relation between NO levels and DBD. NO levels were measured in serum from 45 patients diagnosed as having DBD (30 patients with a diagnosis of attention deficit and hyperactivity disorder [ADHD] and 15 with ADHD + oppositional defiant disorder [ODD]) and 51 healthy control subjects. It is statistically significant that the pure ADHD group's blood NO levels are lower than those of both the ADHD + ODD and control groups. There was no significant difference between the ADHD + ODD group and the controls. The difference of the NO levels in DBD may indicate the effect of NO in the etiology of this disorder spectrum.
Glycocarn can raise NO levels by 50%, clinical dosage is 1.6g's of it.
I think raising NO levels, whilst providing slow release sugar and other nootropics may be a very interesting avenue for cognitive performance enhancement.