Effect of CYSTUS052 and green tea on subjective symptoms in patients with infection of the upper respiratory tract

Ulrich Kalus *, Holger Kiesewetter, Hartmut Radtke
Institute of Transfusion Medicine, Charité-Universitätsmedizin Berlin, Berlin, Germany.


Examples of medicinal herbs that have been perpetuated along several generations based simply on a folk tradition are Cistus and green tea. The principal active constituents of the genus Cistus and green tea are polyphenolic compounds. Polyphenols exhibit a wide range of antibacterial, antifungal and antiinflammatory effects.

The present work aimed to investigate the clinical effect of a Cistus extract (CYSTUS052) in comparison with green tea on 300 patients with infections of the upper respiratory tract. Due to the lack of clinical study data on their efficacy in patients, this is a report of the findings of our study on the clinical efficacy of CYSTUS052 in patients with the upper respiratory tract infections (URTIs). This study observed a total of 300 patients (277 completers) treated with CYSTUS052 given in lozenges compared with treatment with an extract of green tea. The patients scored the subjective severity of target symptoms using a predefined scale.

The score of subjective symptoms decreased over the course of treatment with CYSTUS052, whereas treatment with green tea resulted in a less significant decrease of symptoms. CYSTUS052 therefore proved to be an effective adjuvant for the treatment of respiratory infections.

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