• Siyao Xiao, Yang Yu, Yimin Xiong, Fang Sun, Xiaoyu Liu, Jiaxin Yan, and Shunan Zhang.
• Graduate School, Beijing University of Chinese Medicine.
• Medicine (Baltimore). 2020 Oct 30; 99 (44): e22991e22991.

BackgroundIdiopathic pulmonary fibrosis (IPF) is a chronic progressive disease with unknown etiology and hidden onset, which causes major health problems worldwide. Cough is a typical manifestation of IPF, which is usually characterized by cough without phlegm, and seriously affects the quality of life (QOL) of patients. At present, the treatment of IPF is mainly focused on prolonging survival time and improving lung function, such as pirfenidone, nintedanib, and N-acetylcysteine (NAC), but lack of effective measures to improve the QOL. Chinese herbal medicines (CHMs) is widely used in the clinical treatment of IPF. The adjuvant treatment of CHMs can effectively reduce the clinical symptoms of patients. Therefore, we designed this study to evaluate the role of CHMs in the treatment of cough in IPF.MethodThis systematic review and meta-analysis will extract all randomized controlled trials (RCTs) related to the treatment of IPF from the following electronic database without date or language restrictions: PubMed, EMBASE, Cochrane CENTRAL, CNKI, VIP, CBM, and Wanfang database. The primary outcomes will be cough frequency and QOL, while secondary outcomes will include safety events. The methodologic quality of RCTs will be assessed using the Cochrane risk assessment tool. The I test will be used to identify the extent of heterogeneity, and funnel plot analysis will be used to test the publication deviation (the number of studies included >10). We will use RevMan5.3 software for data synthesis and analysis.ResultThis review evaluates the efficacy and safety of CHMs in combination therapy on cough frequency, the quality of life, adverse reactions and safety incidents in patients with IPF.ConclusionThis study protocol will be used to evaluate the efficacy and safety of CHMs in combination with conventional therapy in treatment of cough in IPF.Osf Registration Doi10.17605/OSF.IO/JKQYV.

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