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Updated: Aug 7, 2026

Absorption of Nasal and Bronchial Fluids: Precision Sampling of the Human Respiratory Mucosa and Laboratory Processing of Samples
Published on: January 21, 2018
Ambroxol for the prevention of acute upper respiratory disease
K Nobata1, M Fujimura, Y Ishiura
1Respiratory Medicine, Cellular Transplantation Biology, Kanazawa University Graduate School of Medicine, 13-1 Takara-machi, Kanazawa 920-8641, Japan. k-nobata@yg7.so-net.ne.jp
Abstract:
Although acute upper respiratory diseases (AURDs) such as common cold and influenza are common, few interventions have been proven to be effective in their prevention and treatment. The aim of this study was to assess the efficacy of ambroxol for preventing AURD. Fifty-four patients were randomly divided into 3 groups: a rebamipide (non-mucoactive drug) group (300 mg/day), carbocisteine group (1500 mg/day) and ambroxol group (45 mg/day). The study was divided into 2 terms, the first half-year (summer season) and the second half-year (winter season). In the preceding winter, only 19.5% of the patients had been vaccinated against influenza viruses (flu). The primary goal of this study was to evaluate the effectiveness of mucoactive drugs in decreasing the frequency of AURD. Treatment with ambroxol, but not carbocisteine, significantly reduced the median number of AURD episodes (P=0.0049 vs. rebamipide). Thirty-three patients without vaccination against flu were assessed especially during the second half-year. Treatment with ambroxol also significantly reduced the median number of AURD episodes in this assessment (P=0.0028 vs. rebamipide in the second half-year). In conclusion, ambroxol may be useful for preventing AURD.
Insights
Ambroxol effectively reduced acute upper respiratory disease (AURD) episodes in a clinical study. This mucolytic agent shows promise for preventing common colds and flu, offering a new therapeutic option.
Area of Science:
- Respiratory Medicine
- Pharmacology
Background:
- Acute upper respiratory diseases (AURDs) like the common cold and influenza are prevalent globally.
- Effective preventive and therapeutic interventions for AURDs remain limited.
- Mucoactive drugs are often used, but their specific efficacy in preventing AURD requires further investigation.
Purpose of the Study:
- To evaluate the efficacy of ambroxol, a mucoactive drug, in preventing acute upper respiratory diseases (AURDs).
- To compare the effectiveness of ambroxol against rebamipide and carbocisteine in reducing AURD frequency.
Main Methods:
- A randomized controlled trial involving 54 patients divided into three groups: rebamipide, carbocisteine, and ambroxol.
- The study spanned two six-month periods (summer and winter seasons).
- Participants received daily doses of rebamipide (300 mg), carbocisteine (1500 mg), or ambroxol (45 mg).
Main Results:
- Ambroxol treatment significantly decreased the median number of AURD episodes compared to rebamipide (P=0.0049).
- Carbocisteine did not show a significant reduction in AURD episodes.
- In a subgroup of unvaccinated patients during winter, ambroxol also significantly reduced AURD episodes (P=0.0028 vs. rebamipide).
Conclusions:
- Ambroxol demonstrates potential as an effective agent for preventing acute upper respiratory diseases.
- The findings suggest ambroxol may be a valuable addition to strategies for managing common respiratory infections.
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