Complementary and integrative remedies in the treatment of chronic pruritus: A review of clinical trials.

BACKGROUND: Chronic pruritus is one of the most common conditions in dermatology as well as a common manifestation in many systemic diseases. Since the etiology of chronic pruritus remains somewhat unknown, hence, conventional medications may not always show a good therapeutic response. This finding has led both investigators and patients to use herbal and complementary remedies for its treatment. The aim of this study was to review clinical trials in which herbal and complementary medicine was used in the control and treatment of chronic pruritus.

MATERIALS AND METHODS: In this study, we reviewed related articles in this domain, from 2000 to 2020. The search involved electronic databases including PubMed, Scopus, Web of Science, Cochrane, Google Scholar, and SID databases using the keywords "pruritus", "itch", "herb", "complementary medicine", "traditional medicine", "integrative medicine", and their related MeSH terms. Finally, we extracted the pertinent information from these articles and summarized the results.

RESULTS: The findings of this study showed that 17 clinical trials have been conducted to date in order to evaluate the efficacy of herbal remedies and complementary medicines in the treatment of chronic pruritus. Herbal remedies including turmeric, Fumaria parviflora, Avena sativa, capsaicin, sweet almond oil, peppermint oil, violet oil, vinegar, as well as manual therapies including aromatherapy, auricular acupressure and acupuncture, were significantly effective in the treatment of chronic pruritus.

CONCLUSION: There are only a few studies published on the therapeutic efficacy of herbal remedies and complementary medicine in the treatment of chronic pruritus. Some have shown promising results. Therefore, more evidence-based studies are needed in order to determine if herbal remedies and complementary medicine could be an effective alternative or adjuvant treatment modality in chronic pruritus.