Background: There are effective pharmaceutical agents to treat seasonal allergic rhinitis,
but more and more individuals resort to alternative forms of treatment. One possible alternative candidate
is essential oils. Recently, an inhaler specifically designed to deliver essential oil scents has
proven very effective in treating various medical parameters (e.g., blood pressure, heart rate, cortisol,
blood oxygenation, or pain).
Objective: This work investigates whether an inhaler (AromaStick® ‘Nasal Fresh’) designed to clear
the nasal passageway and reduce congestion has beneficial effects in individuals suffering from seasonal
Methods: A two-armed, randomized, controlled, double-blind effectiveness trial involving individuals
with medium to strong symptoms was conducted to investigate the inhaler’s specific treatment
Results: Over a period of two weeks, the odor inhaler strongly reduced allergic symptoms for both
overall AR symptomatology (d = 1.2) and individual symptomatic allergic rhinitis burden (d = 1.7).
Conclusion: The inhaler produced strong symptom relief. Effects were largest in individuals suffering
primarily from nasal symptoms.