Efficacy of Chamomile-Lemon Balm Syrup in Patients With Conventional Drug-Resistant Cardiac Syndrome X: A Single-Arm Clinical Trial

Objectives: Treatment of cardiac syndrome X (CSX) remains a major challenge for conventional medicine. In this regard, developing new natural treatments could be an alternative choice. This study was planned to appraise the efficacy of chamomile-lemon balm syrup on chest pain and quality of life in patients with conventional drug-resistant CSX. Materials and Methods: 29 participants with conventional drug-resistant were enrolled in a single-arm clinical trial, and 14 participants completed the study protocol. Chamomile (Matricaria chamomilla L.)-lemon balm (Melissa officinalis L.) syrup was provided for the treatment for the 90-day study period. All conventional treatments of CSX remained unchanged. Efficacy assessment included Seattle Angina Questionnaires (SAQ), 36-item short form survey, and the Hospital Anxiety and Depression Scale (HADS). Results: An improvement was observed in the total score of all questionnaires with statistically significant changes over time of the study (P<0.001). Conclusions: Chamomile-lemon balm syrup showed promising results in improving effect on angina symptoms, quality of life, and anxiety and depression in the patients with drug-resistant CSX. However, a placebo-controlled trial should be performed to verify these data.

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