Answer
Caution is important because the selected product contains benzalkonium chloride, which may cause wheezing or bronchospasm, especially in people with asthma.
Sources for this answer
- Menthol and Eucalyptus Inhalation BP 1980 — Current selected SmPCemc · Summary of Product Characteristics
General medicine information. Follow the instructions for your own medicine and speak to a pharmacist or clinician about your individual circumstances.