WHO Collaborating Centre for Drug Statistics Methodology
The Anatomical Therapeutic Chemical (ATC) classification system and the Defined Daily Dose (DDD) is the gold standard measuring unit for exchanging and comparing data on drug use at international, national or local levels.
Order ATC/DDD Index for 2025
Order ATC/DDD Index for 2025
Available as downloadable files, .xlsx or .xlm, or paper versions upon registration and login
Contact information
Telephone
+47 21 07 81 60
E-mail
whocc@fhi.no
Postal address
Norwegian Institute of Public Health
WHO Collaborating Centre for Drug Statistics Methodology
P.O.Box 222 Skøyen
N-0213 Oslo
Norway
Visiting address
Myrens verksted 6H
Bygg C
0473 Oslo