Zolpidem is WEIRD shit. I've been rx'd it before, and at even half the recommended 10mg dose, it made me trip like crazy. In a very different way to true psychedelics such as psilocybin, DMT, AMT, etc.
Reminded me much more of that other funky GABA agonist dissociative/psychedelic, muscimol, from fly agaric mushrooms.
Had something similar happen to me on the other Z-drug, zopiclone. That gave me really peculiar auditory hallucinations...I'd be lying in bed, and all of a sudden, hear cartoonish springing, 'boing' type noises, popping, crackling sounds, and all sorts of other stuff that sounded like it had come straight from a looney tunes cartoon.
The other one, zaleplon, did nothing whatsoever, completely useless, ultrashort acting crap.