Originally posted by fst4dr:
The stuff for cars has something added to it to make it unenjoyable to use for medical purposes.
Good call Simon. Most places that fill N20, add Sulfer Dioxide to the mix. No more than 100ppm. You would get more of a kick with pure nitrous oxide (medical grade), but IIRC, it is no longer legal to use straight N20 for fills.
Not sure what it is. Just don't try getting high off of car nitrous. 
Not unless you wanna die....
