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Andreas Schapowal Allergy Clinic, Hochwangstrasse 3, CH-7302
Landquart, Switzerland
andreas.schapowal{at}freesurf.ch
Objectives:
To compare the efficacy and tolerability
of butterbur (Petasites hybridus) with cetirizine in
patients with seasonal allergic rhinitis (hay fever).
What is already known on this topic
Most patients have their symptoms treated for short periods,
particularly during peaks in atmospheric pollen count What this study adds
Butterbur produced fewer sedating effects than cetirizine Butterbur should be considered when the sedating effects of
antihistamines must be avoided
Design:
Randomised, double blind, parallel group comparison.
Setting:
Four outpatient general medicine and allergy clinics in Switzerland and Germany.
Participants:
131 patients were screened for seasonal
allergic rhinitis and 125 patients were randomised (butterbur 61;
cetirizine 64).
Interventions:
Butterbur (carbon dioxide extract
tablets, ZE 339) one tablet, four times daily, or cetirizine, one
tablet in the evening, both given for two consecutive weeks.
Main outcome measures:
Scores on SF-36 questionnaire
and clinical global impression scale.
Results:
Improvement in SF-36 score was similar in the
two treatment groups for all items tested hierarchically. Butterbur and
cetirizine were also similarly effective with regard to global
improvement scores on the clinical global impression scale (median
score 3 in both groups). Both treatments were well tolerated. In the
cetirizine group, two thirds (8/12) of reported adverse events were
associated with sedative effects (drowsiness and fatigue) despite the
drug being considered a non-sedating antihistamine.
Conclusions:
The effects of butterbur are similar to
those of cetirizine in patients with seasonal allergic rhinitis when evaluated blindly by patients and doctors. Butterbur should be considered for treating seasonal allergic rhinitis when the sedative effects of antihistamines need to be avoided.
Seasonal allergic rhinitis (hay fever) is common in countries with
temperate climates.
After two weeks, the effects of butterbur and cetirizine were
comparable in patients with hay fever
© BMJ 2002
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