Abstract
Background and aim
Primary prevention of spontaneous bacterial peritonitis (SBP) is an important strategy to reduce morbidity and mortality in cirrhotic patients with ascites. Efficacy and safety of alternating rifaximin and norfloxacin as primary prophylaxis is questionable.
Methods
Three hundred thirty-four cirrhotic patients with high SAAG (≥1.1) ascites, protein level in ascitic fluid less than 1.5 g/dL with advanced liver disease (Child-Pugh score >9 points with serum bilirubin level >3 mg/dL) or renal impairment (serum creatinine level >1.2 mg/dL, blood urea nitrogen level >25 mg/dL, or serum sodium level <130 mEq/L) were included in an open-label, randomized study aimed at comparing alternating use of norfloxacin and rifaximin vs. norfloxacin or rifaximin alone as primary prophylaxis for SBP. Both intention-to-treat and per-protocol efficacy analyses were done after 6 months of treatment by assessment of ascitic fluid neutrophil count. Safety analysis was done for all intention-to-treat populations.
Results
Alternating norfloxacin and rifaximin showed superior prophylaxis by intention-to-treat (74.7 vs. 56.4 % vs. 68.3 %, p < 0.048). Pairwise analysis showed that alternating regimen had lower probability to develop SBP when compared to a norfloxacin-based regimen in intention-to-treat (p = 0.016) and per protocol analysis (p = 0.039). There was no difference among the studied groups regarding the incidence and severity of adverse events reported.
Conclusions
Alternating norfloxacin- and rifaximin-based primary prophylaxis for SBP showed higher efficacy with the same safety profile when compared with monotherapy of norfloxacin.
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Acknowledgements
We thank all staff members of inpatient and outpatient departments in all sharing centers for their help in collection of our data.
Author contribution statement
M. Assem initiated the collaborative project, designed the trial, implemented the trial for the all countries, and drafted and revised the paper. M. Elsabaawy monitored data collection in Egypt, and revised the draft paper. M. Abdelrashed monitored data collection in Saudi Arabia, and drafted the paper. S. Elemam implemented the trial in Saudi Arabia and analyzed the data. Both S. Khodeer and W. Hamed analysed the data and drafted the paper. A. Abdelaziz monitored data collection for the whole trial especially for laboratory results and analyzed the data. G. El-Azab wrote the statistical analysis plan, designed data collection tools, monitored data collection for the whole trial, analyzed the data, and drafted and revised the paper.
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All participating centers shared in the fund.
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M. Assem, M. Elsabaawy, M. Abdelrashed, S. Elemam, S. Khodeer, W. Hamed, A. Abdelaziz, G. El-Azab declare no competing interests, either financial or non-financial.
Ethical approval
All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. The study protocol was approved by the local ethics committee at each participating center and written informed consent was obtained from patients before entering the study. All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1975.
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Assem, M., Elsabaawy, M., Abdelrashed, M. et al. Efficacy and safety of alternating norfloxacin and rifaximin as primary prophylaxis for spontaneous bacterial peritonitis in cirrhotic ascites: a prospective randomized open-label comparative multicenter study. Hepatol Int 10, 377–385 (2016). https://doi.org/10.1007/s12072-015-9688-z
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DOI: https://doi.org/10.1007/s12072-015-9688-z