Wasn't under the impression duster was pharmacology active, makes sense now. Anyways, its not like I had brain scans before and after so all what I can say isn't very credible if you want to look at it that way but I'll just say what I thought happened.

Hard to describe but after first use which was at night when it wore off I felt unable to think, not foggy just like my mind was clogged a little but it wasn't even that noticeable and I had a headache from the butane so I didn't think of it and went to bed. Next day I woke up feeling normal and with every time I used some that feeling become stronger and lasted longer each time, I was no addict or anything I only did it maybe 5-6 times but used more and binged more each time and this feeling wasn't placebo. For some reason each time seemed my tolerance decreased because I felt the effects more though I kept taking more and bigger hits. I believe I was more aware of this effect because I was studying during the day and things I had studied well, rewritten notes of and solved past questions seemed to get wiped off my memory and I had trouble using concepts that I just mastered. It wasn't a benzo "I don't remember anything" feeling, just weird.

I notice that my short term memory isn't to par temporarily after using benzos but with huffing it's like a fuse blew and ever since its pretty bad. The "damage" isn't severe or anything but it really felt like it was exponential. I don't know if my brain was playing tricks on me but I did NOT like the those effects and didn't want to find out. Another thing was that before a race I used to get crazy adrenaline rush's that I just don't get half as intense now. This might be because butane/propane makes you more sensitive to it while on it and why some people get heart attacks but 5-6 times use puzzles me how it could give me an 'adrenaline tolerance?' that's lasted since.

TL;DR get real drugs