Planta Med 1990; 56(1): 44-47
DOI: 10.1055/s-2006-960881

© Georg Thieme Verlag Stuttgart · New York

Randomized, Double-Blind Study of Freeze-Dried Urtica dioica in the Treatment of Allergic Rhinitis

Paul Mittman
  • National College of Naturopathic Medicine, Portland, Oregon 97216, U.S.A.
Further Information

Publication History


Publication Date:
05 January 2007 (online)


Ninety-eight individuals took part in a double-blind randomized study comparing the effects of a freeze-dried preparation of Urtica dioica (stinging nettles) with placebo on allergic rhinitis. Sixty-nine individuals completed the study. Assessment was based on daily symptom diaries, and global response recorded at the follow-up visit after one week of therapy. Urtica dioica was rated higher than placebo in the global assessments. Comparing the diary data Urtica dioica was rated only slightly higher.