Table of Contents
ISRN Allergy
Volume 2011, Article ID 836051, 11 pages
Clinical Study

Citrus/Cydonia Compositum Subcutaneous Injections versus Nasal Spray for Seasonal Allergic Rhinitis: A Randomized Controlled Trial on Efficacy and Safety

1Department of Healthcare and Nutrition, Louis Bolk Institute, Hoofdstraat 24, 3972 LA Driebergen, The Netherlands
2Muvara, Tijmtuin 8, 2353 PH Leiderdorp, The Netherlands
3Cell Biology and Immunology Group, Wageningen University, Marijkeweg 40, 6709 PG Wageningen, The Netherlands

Received 22 March 2011; Accepted 27 April 2011

Academic Editors: B. Xu and A. S. Zacharasiewicz

Copyright © 2011 Erik W. Baars 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.


Background. Clinical experiences in vitro and clinical studies have demonstrated the curative potency and safety of Citrus/Cydonia compositum in seasonal allergic rhinitis treatment. Objectives. To compare the efficacy and safety of two routes of administration (nasal spray versus subcutaneous injections). Methodology: Design. a national, randomised, comparative clinical trial with two parallel groups. Participants. 23 patients fulfilled the study requirements. Intervention. after a one- or two-week wash-out period, 23 patients were randomized, to a 6-week treatment period. Outcomes. immunological and symptom severity changes and safety. Immunologic outcome assessments were blinded to group assignment. 23 patients were randomized and from 22/23 patients (11 in each group) blood samples were analyzed before and after treatment. Conclusion. Both routes of administration demonstrate immunological and clinical effects, with larger inflammatory and innate immunological effects of the nasal spray route and larger allergen-specific clinical effects of the subcutaneous route, and are safe.