Guidelines for ATC classification and DDD assignment - WHOCC

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Combined preparations containing nonivamide used as a rubefacient are
classified in this group on a 4th level.
M02AC Preparations with salicylic acid derivatives
No separate 5th levels are established in this group.
Combinations of salicylic acid derivatives and other products are
classified in this group.
M02AX Other topical products for joint and muscular pain
This group comprises topical products, which cannot be classified in the
preceding groups.
Preparations with menthol are generally classified in D04 - Antipruritics,
incl. antihistamines, anesthetics, etc.
M03 MUSCLE RELAXANTS
This group comprises peripherally, centrally and directly acting muscle
relaxants.
See also G04BD - Urinary antispasmodics.
M03A MUSCLE RELAXANTS, PERIPHERALLY ACTING AGENTS
This group comprises peripherally acting muscle relaxants such as
curare alkaloids and suxamethonium.
The drugs in this group are mainly used together with anesthetics.
As for other drugs used in general anesthesia (see N01A), no DDDs
have been established in this group because the doses used vary
substantially.
M03AA Curare alkaloids
M03AB Choline derivatives