Background: The objective of the clinical study was to investigate the efficacy and tolerance of a homeopathic nasal spray in cases of hay fever (seasonal allergic rhinitis) in comparison with the conventional intranasal cromolyn sodium therapy. Patients and Methods: In total, 146 outpatients with symptoms of hay fever were enrolled into the clinical study (randomized, double-blind, equivalence trial) (time of treatment: 42 days). The homeopathic remedy (Luffa comp.-Heel ™ Nasal Spray, dosage: 0.14 ml per application, 4 times per a day / naris) consisted of a fixed combination made up of Luffa operculata, Galphimia glauca, histamine, and sulfur. The main outcome measure of the efficacy was the quality of life as measured by means of the Rhinoconjunctivitis Quality of Life-Questionnaire (RQLQ). The tolerance of the trial medication was registered by means of global assessment, rhinoscopy, recording of adverse events and with the aid of vital and laboratory parameters. Results:The results of the study demonstrate a quick and lasting effect of the treatment. This effect was independent from the medication applied and produced a nearly complete remission of the hay fever symptoms. The RQLQ global score changed significantly in the course of the treatment, indicating therapeutic equivalence between the two forms of treatment. Adverse systemic effects did not occur. Local adverse events appeared in 3 patients. Conclusions:The study proved that, for the treatment of hay fever, the homeopathic nasal spray is as efficient and well tolerable as the conventional therapy with cromolyn sodium.

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