Postal address:
WHO Collaborating Centre for Drug Statistics Methodology
Norwegian Institute of Public Health
Postboks 222 Sk°yen
0213 Oslo

Visiting/delivery address:
Sandakerveien 24C
Bygg C
0473 Oslo

Tel:  +47 21 07 81 60

ATC classification of combinations of opioids and other analgesics
Published Friday January 22 2016

The ATC classification of opioids in combination with other analgesics was on the agenda for the International Working Group for Drug Statistics Methodology meeting in October 2015.  A proposal to classify all combination of opioids and other analgesics in a new ATC 4th level N02AJ Opioids in combination with non-opioid analgesics was decided. All combinations of opioids and other analgesics will be classified in N02A Opioids, independent of the amount of opioid.

Since the alterations will have implications for many users of the ATC/DDD methodology, the deadline for objections and comments to the temporary alterations in N02A Opioids is extended from 1 February to 15 February 2016.

You will find an overview of the temporary classification below.

Please note that the proposal was published on our website in December 2015 and is available here.

The existing DDDs of the combination products moved to N02AJ, expressed in unit dose (UD), will be kept.

The following new ATC 4th level and 5th levels will be assigned for opioids in combination with non-opioid analgesics:


Opioids in combination with non-opioid analgesics (new level) N02AJ01

N02AJ01 dihydrocodeine and paracetamol
N02AJ02 dihydrocodeine and acetylsalicylic acid
N02AJ03 dihydrocodeine and other non-opioid analgesics
N02AJ06 codeine and paracetamol
N02AJ07 codeine and acetylsalicylic acid
N02AJ08 codeine and ibuprofen
N02AJ09 codeine and other non-opioid analgesics
N02AJ13 tramadol and paracetamol (previous code N02AX52)
N02AJ14 tramadol and dexketoprofen
N02AJ17 oxycodone and paracetamol 
N02AJ18 oxycodone and acetylsalicylic acid 
N02AJ19 oxycodone and ibuprofen


Last updated: 2018-05-15