Inhaling Essential Oils: Purported Benefits and Harms.

Patients with cystic fibrosis are experimenting with inhaling essential oils (scientifically described as random plant-derived secondary metabolites) through diffusers or nebulizers as a form of natural therapy to treat chronic lung infections. In vitro studies are starting to be published on the effects of essential oils (cinnamon, clove, oregano, and thyme) on bacteria commonly found in the lungs of patients with cystic fibrosis. There are no clinical studies and therefore no data are available on a potential placebo effect. There is a potential risk of lipoid pneumonia with inhaling essential oils, although no case reports have been published. There is also potential for pesticide exposure, particularly with peppermint oil. Treating providers are encouraged to include discussion of the use of herbal and other natural remedies with their patients and patient caregivers.