Alterations in ATC codes and DDDs valid from January 2011 are listed below. The list contains only products available on the market in Norway. A cumulative survey showing all the ATC/DDD alterations made is also available on the website: www.whocc.no.
| Previous ATC code | ATC level name | New ATC code |
| G03AC03 | levonorgestrel | G03AD01 1) |
| P01BE52 | artemether and lumefantrine | P01BF01 |
| R03CA02 | ephedrine | C01CA26 2) |
1) Oral products (packages) only indicated for emergency contraception
2) Only parenteral formulations
| ATC code | ATC level name | Previous DDD | New DDD |
| B02BD09 | nonacog alfa | 450 U P | 2.7 mg P depot |