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Barbara Badanta,1,* Isabel Álvarez-Pérez,2 Patricia Bonilla Sierra,3 María González-Cano-Caballero,4,* Giancarlo Lucchetti,5 Rocío de Diego-Cordero1,* 1Department of Nursing; Faculty of Nursing, Physiotherapy and Podiatry, University of Seville, Seville, Spain; 2Faculty of Nursing, Physiotherapy and Podiatry. University of Seville, Seville, Spain; 3Department of Health Sciences, Universidad Técnica Particular de Loja (UTPL), Loja, Ecuador; 4Department of Nursing; Faculty of Health Sciences, University of Granada, Granada, Spain; 5Department of Medicine; School of Medicine, Universidade Federal de Juiz de Fora, Juiz de Fora, Brazil*These authors contributed equally to this workCorrespondence: María González-Cano-Caballero, Department of Nursing, Faculty of Health Sciences, University of Granada, Av. de la Ilustración, 60, Granada, 18071, Spain, Email mariagcc@ugr.esAbstract: This study aims to investigate the current evidence for the use of complementary and alternative medicine (CAM) in fibromyalgia (FM). A systematic review was conducted searching for PubMed, Scopus, CINAHL, PsycInfo, and Web of Science databases. Randomized controlled trials published up to December 2023 in peer-reviewed journals were included. Methodological quality was assessed by the Quality Assessment of Controlled Intervention Studies tool. A total of 216 articles were identified and 15 constituted the final sample. The type of CAM most used was traditional Chinese medicine (60%), and the most common instrument used was the Fibromyalgia Impact Questionnaire (60%). Our review was grouped into four themes based on the origin of the therapies: 1) Traditional Chinese Medicine; 2) Japanese natural harmonization (eg, Reiki); 3) Ayurvedic Medicine; and 4) Other non-drug therapies. Our systematic review showed that there is a wide range of CAMs used to treat FM. Most of the clinical trials have shown significant results for the effectiveness of these interventions in both physical and mental health outcomes of FM as compared to control groups. However, the heterogeneity of the interventions and outcomes warrants further studies on this topic.Keywords: complementary therapies, fibromyalgia treatment, nonpharmacological interventions, traditional medicine