NAllylnormorphine 
opioid 
3rd ECDD (1952)  Critical review 
NAllylnormorphine and analogs 
opioid 
4th ECDD (1954)  Critical review 
NBenzylpiperazine 
stimulant 
35th ECDD (2012)  Prereview, 36th ECDD (2014)  Critical review 
Nethyl3,4methylenedioxyamphetamine 
stimulant 
22nd ECDD (1985)  Critical review 
Nethylamphetamine 
stimulant 
22nd ECDD (1985)  Critical review 
NEthylhexedrone 
stimulant 
42nd ECDD (2019)  Critical review 
Nethylnorpentylone 
stimulant 
41st ECDD (2018)  Critical review 
NEthyltenamfetamine 
stimulant 
26th ECDD (1989)  Critical review 
NHydroxytenamfetamine 
stimulant 
26th ECDD (1989)  Critical review 
NMethyl1(3,4methylenedioxyphenyl)2butanamine 
stimulant 
31st ECDD (1999) – Prereview, 32nd ECDD (2001)  Critical review 
Nalbuphine 
opioid 
25th ECDD (1989)  Critical review 
Nealbarbital 
sedative 
23rd ECDD (1987)  Critical review 
Nicocodine 
opioid 
12th ECDD (1962)  Critical review, 13th ECDD (1964)  Critical review 
Nicodicodine 
opioid 
14th ECDD (1965)  Critical review, 15th ECDD (1966)  Critical review, 19th ECDD (1973)  Critical review 
Nicodicodine (less than 100mg or 2.5% when compounded) 
opioid 
19th ECDD (1973)  Critical review 
Nicomorphine 
opioid 
9th ECDD (1959)  Critical review 
Nicotine 
stimulant 
30th ECDD (1998) – Prereview 
Nitrous oxide 
sedative 
46th ECDD (2023) PreReview Report

Noracymethadol 
opioid 
12th ECDD (1962)  Critical review, 13th ECDD (1964)  Critical review 
Norcodeine 
opioid 
9th ECDD (1959)  Critical review 
Norlevorphanol 
opioid 
10th ECDD (1960)  Critical review 
Normethadone 
opioid 
7th ECDD (1957)  Critical review 
Normethadone preparations 
opioid 
9th ECDD (1959)  Critical review 
Normorphine 
opioid 
9th ECDD (1959)  Critical review 
Norpethidine 
opioid 
12th ECDD (1962)  Critical review 
Norpipanone 
opioid 
13th ECDD (1964)  Critical review 