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Evidence-Based Complementary and Alternative Medicine
Volume 2012 (2012), Article ID 984203, 9 pages
http://dx.doi.org/10.1155/2012/984203
Research Article

Essential Oil Inhalation on Blood Pressure and Salivary Cortisol Levels in Prehypertensive and Hypertensive Subjects

1College of Nursing, Eulji University, Daejeon, Republic of Korea
2School of Medicine, Eulji University, Daejeon, Republic of Korea
3Appenzeller School of Public Administration, Paichai University, Daejeon, Republic of Korea
4Medical Research Division, Korea Institute of Oriental Medicine, Daejeon, Republic of Korea

Received 20 August 2012; Accepted 11 October 2012

Academic Editor: David Mischoulon

Copyright © 2012 In-Hee Kim et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The purpose of this study was to identify the effects of essential oil inhalation on the 24-hour ambulatory blood pressure (BP) and salivary cortisol level in 83 prehypertensive and hypertensive subjects. The experimental group ( ) was asked to inhale an essential oil blended with lavender, ylang-ylang, marjoram, and neroli (20 : 15 : 10 : 2), whereas the placebo group ( ) was asked to inhale an artificial fragrance for 24 hours and the control group received no treatment ( ). The SBP ( ) and DBP ( ) measured at home in the experimental group were significantly decreased compared with the placebo group and the control group after treatment. The daytime SBP during the 24-hour ambulatory BP measurement of the experimental group presented with significant decreases in comparison with the measurements of the placebo group and the control group ( ). There was no statistically significant difference in the nighttime SBPs. The daytime DBPs during the 24-hour ambulatory BP measurements of the experimental group presented with significant decreases in comparison with the measurements of the placebo group and the control group ( ). There was no significant difference in the night time DBPs. The experimental group showed significant decreases in the concentration of salivary cortisol in comparison with the concentrations of the placebo group and the control group ( ). In conclusion, the inhalation of an essential oil had immediate and continuous effects on the home SBP, daytime BP, and the stress reduction. Essential oils may have relaxation effects for controlling hypertension.