Guidelines for ATC classification and DDD assignment - WHOCC

Combinations with drugs classified in A02B (e.g. esomeprazole) are
classified in M01A using the 50-series.
The DDDs are based on the treatment of rheumatoid arthritis,
except for the coxibs (M01AH).
M01AA Butylpyrazolidines
M01AB Acetic acid derivatives and related substances
M01AC Oxicams
Piroxicam and piroxicam-beta-cyclodextrin are given the same ATC 5th
level code M01AC01.
The DDD for meloxicam is based on the treatment of osteoarthritis.
M01AE Propionic acid derivatives
All ibuprofen preparations are classified in this group, even if they are
only intended for use as pain relief.
M01AG Fenamates
M01AH Coxibs
Ketoprofen lysine is classified at the same ATC 5th level as ketoprofen.
Tolfenamic acid, used in the treatment of migraine, is classified here.
Celecoxib used in FAP (familiar adenomatous polyposis) is classified in
L01XX.
The DDDs for the coxibs are based on the treatment of
osteoarthritis.
M01AX Other antiinflammatory and antirheumatic agents, non-steroids
This group comprises antiinflammatory and antirheumatic drugs which
cannot be classified in the preceding groups.
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