Inhaled antiinfectives are classified in ATC group J - Antiinfectives for systemic use.

This group comprises a large number of preparations, most of which are combined preparations.
Cold preparations containing therapeutic levels of antiinfectives should be classified in ATC group J - Antiinfectives for systemic use.
Cold preparations with therapeutic levels of analgesics/anti-inflammatory agents should be classified in the respective N02/M01 groups.
Cold preparations with both antiinfectives and analgesics should be classified in ATC group J - Antiinfectives for systemic use.
Cold preparations with minimal amounts of analgesics are classified in R05X - Other cold preparations.
See also R01 - Nasal preparations, R02 - Throat preparations, and
R03D - Other systemic drugs for obstructive airway diseases.

In addition to cough suppressants and expectorants, the preparations may contain bronchodilating agents, antihistamines etc. Combinations, which contain respiratory stimulants, e.g. theophylline, should be classified in R03DA.