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Zheng Z, Yang K, Liu N, Fu X, He H, Chen H, Xu P, Wang J, Liu M, Tang Y, Zhao F, Xu S, Yu X, Han J, Yuan B, Jia B, Pang G, Shi Y, Kuang M, Shao H, Xiong H, He J, Pan Y, Chen R. Evaluation of safety and efficacy of inhaled ambroxol in hospitalized adult patients with mucopurulent sputum and expectoration difficulty. Front Med (Lausanne) 2023; 10:1182602. [PMID: 37305123 PMCID: PMC10248402 DOI: 10.3389/fmed.2023.1182602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Accepted: 05/05/2023] [Indexed: 06/13/2023] Open
Abstract
Background Ambroxol is a widely used mucoactive drug in sputum clearance of respiratory diseases taken orally and by injection. However, there is a paucity of evidence for inhaled ambroxol in sputum clearance. Methods This study performed a multicenter, randomized, double-blind, placebo-controlled, phase 3 trial at 19 centers in China. Hospitalized adult patients with mucopurulent sputum and expectoration difficulty were recruited. Patients were randomized by 1:1 to receive inhalation of either ambroxol hydrochloride solution 3 mL (22.5 mg) + 0.9% sodium chloride 3 mL or 0.9% sodium chloride 6 mL twice daily for 5 days, with an interval of more than 6 h. The primary efficacy endpoint was the absolute change in the sputum property score after treatment compared to the baseline in the intention-to-treat population. Results Between 10 April 2018 and 23 November 2020, 316 patients were recruited and assessed for eligibility, of whom 138 who received inhaled ambroxol and 134 who received a placebo were included. Patients who received inhaled ambroxol had a significantly greater decrease in the sputum property score compared with patients who received inhalation of placebo (difference: -0.29; 95% CI: -0.53 to -0.05; p = 0.0215). Compared with the placebo, inhaled ambroxol also significantly reduced more expectoration volume in 24 h (difference: -0.18; 95% CI: -0.34 to -0.03; p = 0.0166). There was no significant difference in the proportion of adverse events between the two groups, and no deaths were reported. Discussion In hospitalized adult patients with mucopurulent sputum and expectoration difficulty, inhaled ambroxol was safe and effective for sputum clearance compared with a placebo. Clinical trial registration [https://www.chictr.org.cn/showproj.html?proj=184677], Chinese Clinical Trial Registry [ChiCTR2200066348].
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Affiliation(s)
- Zeguang Zheng
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Kai Yang
- Shenzhen Institute of Respiratory Disease, Shenzhen People's Hospital (First Affiliated Hospital of South University of Science and Technology and Second Affiliated Hospital of Jinan University), Shenzhen, China
| | - Ni Liu
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Xiuhua Fu
- The Affiliated Hospital of Inner Mongolia Medical University, Hohhot, China
| | - Huijie He
- The First Affiliated Hospital of Baotou Medical College Inner Mongolia University of Science and Technology, Baotou, China
| | - Hong Chen
- The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | | | - Jing Wang
- The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | | | - Yuling Tang
- The First Hospital of Changsha, Changsha, China
| | - Fengzi Zhao
- The First Hospital of Qiqihar, Qiqihar, China
| | - Shufeng Xu
- First Hospital of Qinhuangdao, Qinhuangdao, China
| | - Xiaowei Yu
- Changzhou No.2 People's Hospital, Changzhou, China
| | - Jichang Han
- Huaihe Hospital of Henan University, Kaifeng, China
| | - Bo Yuan
- Siping Central People's Hospital, Siping, China
| | - Bin Jia
- The First Affiliated Hospital of Xinjiang Medical University, Urumqi, China
| | - Guifen Pang
- Affiliated Hospital of Chengde Medical University, Chengde, China
| | | | - Min Kuang
- The Second Nanning People's Hospital, Nanning, China
| | - Haiyan Shao
- The First People's Hospital of Wenling, Wenling, China
| | - Hao Xiong
- The Second People's Hospital of Yibin, Yibin, China
| | - Jia He
- Department of Health Statistics, Faculty of Medical Service, Naval Medical University, Shanghai, China
| | | | - Rongchang Chen
- Shenzhen Institute of Respiratory Disease, Shenzhen People's Hospital (First Affiliated Hospital of South University of Science and Technology and Second Affiliated Hospital of Jinan University), Shenzhen, China
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