Canadian respiratory journal : journal of the Canadian Thoracic Society
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Randomized Controlled Trial
The effect of inhaled menthol on upper airway resistance in humans: a randomized controlled crossover study.
Menthol (l-menthol) is a naturally-occurring cold receptor agonist commonly used to provide symptomatic relief for upper airway congestion. Menthol can also reduce the sensation of dyspnea. It is unclear whether the physiological action of menthol in dyspnea reduction is through its cold receptor agonist effect or whether associated mechanical changes occur in the upper airway. ⋯ Inhalation of menthol does not alter upper airway resistance in awake human subjects.