Guidelines for ATC classification and DDD assignment - WHOCC

Topical products containing glyceryl trinitrate or isosorbide dinitrate
used for treatment of anal fissures are classified in C05AE.
D03B ENZYMES
Proteolytic enzymes for topical treatment of ulcers are classified here.
D03BA Proteolytic enzymes
D04 ANTIPRURITICS, INCL. ANTIHISTAMINES, ANESTHETICS,
ETC.
D04A ANTIPRURITICS, INCL. ANTIHISTAMINES, ANESTHETICS,
ETC.
This group comprises antipruritics for topical use in the treatment of
pruritus, minor burns, insect stings, herpes zoster etc.
See also D07 - Corticosteroids, dermatological preparations.
D04AA Antihistamines for topical use
At each 5th level, antiseptics, siccants etc. may occur in combination
with the antihistamines. Combinations with corticosteroids, see
D07 - Corticosteroids, dermatological preparations.
Combinations with anesthetics are classified in D04AB.
Combinations of diphenhydramine and diethyltoluamid are classified at
the plain level for diphenhydramine in D04AA.
D04AB Anesthetics for topical use
At each 5th plain level, antiseptics, siccants etc. may occur in
combination with the anesthetics. Combinations with corticosteroids,
see D07 - Corticosteroids, dermatological preparations.
Combinations with antihistamines are classified here.
See also C05A - Agents for treatment of hemorrhoids and anal fissures
for topical use, and N01B - Anesthetics, local.
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