i thought i would post my experience with this one.
this stuff DOES actually work. with me, I take 2.5 grams and it seems to be perfect. take it on a empty stomach. it does take a while to work. like a hour or maybe a bit more.
after about a hour on 2.5g, i feel a similar effect that i would when i take my xanax xr 1-3mg. you only feel a mild sedation in comparison to a benzo, but the calmness effect is the same.
i also found that when i take 3mg, instead of 2.5, it still works, but an hour or more after it has started to work i get really dizzy and nauseous that last for hours. so you have to get the dosing right.
and also, if i take less than 2.5g, i dont really feel anything. so there is a 500mg threshold between not working, working, and nausea. crazy!
i find phenibut useful if i run out of my benzo's or if i desire a little extra calmness on a day that i know might be anxiety filled. I take phenibut XT from 'serious nutrition solutions'. i dont take it often enough to know anything about withdrawal or tolerance. all i know is if you are having benzo withdrawal, this stuff works wonders. i feel like i want to tear my skin off with benzo withdrawal, then after a hour of taking phenibut, bam, im ok again. i also notice that phenibut works all day, and even into the next day, with the dose im on.
EDIT: oh and its def NOT a placebo effect with this stuff.