Lavender Oil May Improve Anxiety
An oral preparation of lavender oil called Silexan decreased anxiety significantly more than placebo in a study by S. Kasper et al. published in the International Journal of Neuropsychopharmacology in 2014.
This randomized double-blind study of 539 patients with Generalized Anxiety Disorder compared two different doses of Silexan (160 mg and 80 mg) with a 20 mg dose of the antidepressant paroxetine and with placebo. Both doses of Silexan reduced anxiety significantly more than placebo did. While paroxetine performed better than placebo, that result did not reach statistical significance.
Sixty percent of the patients who received the 160 mg dose of Silexan showed reductions of 50% in scores on the Hamilton Anxiety Scale (HAMA). In addition to its anti-anxiety effects, Silexan was associated with an antidepressant effect, improved general mental health, and improvement in health-related quality of life.