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

Varenicline nasal spray used for dry eye disease is classified in S01XA.

This group comprises preparations for local treatment in nasal congestion (e.g. sympathomimetics) or for prophylaxis and treatment of allergic rhinitis (e.g. corticosteroids, cromoglicate preparations). Most of the products are nasal drops, nasal sprays or nasal inhalants. Formulations approved for eye, ear and nose are classified in S03.
See also R01B - Nasal decongestants for systemic use, and
R06 - Antihistamines for systemic use.

Small amounts of antiseptics etc. are allowed at each 5th level.
Combinations with antibiotics, antihistamines, ipatropium bromide etc. are classified in R01AB, while combinations with corticosteroids are classified in R01AD.