Guidelines for ATC classification and DDD assignment - WHOCC

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Silibinin, which is also used in amanita poisoning, is classified in
A05BA at the same 5th level as silymarin.
Anticholinesterases, which are used as curare antidotes, are classified in
N07AA.
Clonidine low strength tablets (e.g. 25 mcg) are classified in N02CX,
even if the indication also may be “opioid withdrawal symptoms”. Both
DL-methionine and L-methionine are included in the ATC 5th level
V03AB26 - methionine.
Naltrexone is classified in N07BB - Drugs used in alcohol dependence.
Combinations of oxycodone and naloxone are classified in N02AA -
Natural opium alkaloids.
Combinations of buprenorphine and naloxone are classified in N07BC -
Drugs used in opioid dependence.
V03AC Iron chelating agents
V03AE Drugs for treatment of hyperkalemia and hyperphosphatemia
Plain calcium products also used in hyperphosphatemia are classified in
A12AA.
The DDD for lanthanum carbonate is expressed as lanthanum and
is equivalent to 4.3 g lanthanum carbonate.
V03AF Detoxifying agents for antineoplastic treatment
Mesna in i.v. formulations used for the prophylaxis of urothelial toxicity
are classified in this group. Mesna used as a mucolytic agent (e.g.
administered by a nebuliser) is classified in R05CB.
Rasburicase is classified here, other agents (e.g. febuxostat) for
treatment of hyperuricaemia, see M04AA.
Glutathione is classified in V03AB - Antidotes.