The effect of menthol on nasal resistance to air flow
Journal of Laryngology and Otology
Menthol vapour increased sensation of airflow without a consistent change in nasal resistance.
Reviewed guidance
Menthol for nasal congestion
Small controlled studies suggest menthol can make nasal airflow feel easier during a cold, but objective measurements show it does not reliably reduce nasal airway resistance. The benefit is sensory rather than true decongestion.
What this means
Short-term subjective relief of the sensation of nasal blockage during a common cold using a menthol preparation comparable to studied products.
How to use it: If using menthol, choose a labeled lozenge or other product intended for that route and follow its directions. Do not convert these studies into a claim for peppermint tea, homemade essential-oil inhalation, or drops placed directly in the nose.
Safety & cautions
Menthol can irritate skin or mucosa in concentrated forms. Keep essential oils away from the eyes and do not place undiluted oils in the nostrils. Children require age-appropriate products and supervision.
Get medical care for symptoms that are severe, last longer than expected, get worse, or otherwise concern you.
Household preparations
Practical ways to use the ingredient may not provide the same form or amount discussed in the evidence.
Evidence transparency
Evidence & sources
The effects of oral administration of (-)-menthol on nasal resistance to airflow and nasal sensation of airflow in subjects suffering from nasal congestion associated with the common cold
Journal of Pharmacy and Pharmacology
Double-blind trial found improved subjective nasal airflow sensation without reduced nasal resistance.
Eucalypti aetheroleum - herbal medicinal product
European Medicines Agency
Cold-context herbal monograph retained as reviewed background rather than a congestion-specific efficacy source.
Sinusitis (acute): antimicrobial prescribing
NICE
Provides evidence caution for saline, decongestants, and steam in acute sinusitis.
Manage Common Cold
CDC
Controls saline, humidification, cold duration, and escalation guidance.