Effects
Nitrous Oxide (N2O) is a simple gas that, when inhaled, causes rapid analgesia (pain relief), euphoria, mild sedation, and sometimes psychedelic dissociation.
Cosmic Says...
NOS It has been used in dentistry since the mid 1800's and recreationally since the late 1700's when it earned the name 'laughing gas' because of its tendency to cause laughter in those who inhale.
Unfortunately, due to a law change Nos is no longer available at Cosmic Corner.
For more info see: http://www.erowid.org/chemicals/nitrous/nitrous_basics.shtml