Level below
Code N01AX03
ketamine
Code N01AX04
propanidid
Code N01AX05
alfaxalone
Code N01AX07
etomidate
Code N01AX10
propofol
Code N01AX11
sodium oxybate
Code N01AX13
nitrous oxide
Code N01AX14
esketamine
Code N01AX15
xenon
Code N01AX63
nitrous oxide, combinations