I have brought this account back from the dead to respond to this thread, since I have been going on here lately anyways.
I have gotten N from A many years ago, I have had it till recently, two bottles that is.
Let me preface this with saying that N tastes like one of the worst things you can probably imagine, its literally like chemical waste, not bitter, not smelly, its just very strange, you can get used to the taste, but it takes time, ideally you drink it with something else to mask the taste, I used honey for instance.
Depending on the dosage, the speed at which the effects occur changes, but even as little as a spoonful or two will have you passing out in a matter of 30 minutes tops.
If you have ever undergone a surgery and have been under anesthesia, it is very similiar, just slower. When you are laying on the operating table they have you nowadays usually inhale oxygen and pump something to inhibit your GABA receptors through an IV, usually till a count of ten you lose consciousness, its accompanied by a particular dizziness near the end.
I have been yapping about that because N acts the very same way. You start getting really dizzy and very very tired, you have to sit down, or prefferably lay down. You can barely move a muscle, everything is spinning, you can feel your breathing getting slower and weaker, till you eventually pass out.
I have gone through this many many times, I have developed a habit of abusing N to fall asleep over a year ago as well, just sipping a little to pass out and get the day over with.
When you wake up its not entirely pleasant, you feel very drowsy and heavy all over, plus the dizziness does not fade for up to half a day after you wake up. This all however depends on the dosage. A spoonful of N will make you pass out in 30 minutes for about 4 hours roughly, at least from personal experience, this would wary with age, weight and health condition. When I was at my peak with abusing N i would fall unconsciousness for up to 12 hours or so, where it would take a solid day to getting rid of the aftereffects.
Also an edit and afterthought: Do not abuse N, I have become addicted to it after using it to make myself pass out in just a few weeks, the withdrawal from that is very bad, it makes you feel like you´re going insane.