Prevalence of potential drug- drug interactions and associated factors among outpatients and inpatients in Ethiopian Hospitals: a systematic review and Meta-analysis of observational studies
Abstract Background A very few number of studies are available regarding the evaluation of potential drug- drug interactions in Sub-Saharan Africa. This is also a problem in Ethiopian health care system. Now a days, in Ethiopia polypharmacy is increased due to comorbid conditions in the hospital health care system, a large number of patients are treated in the outpatient setting and also hospitalized and there is a high possibility for drug- drug interactions. Therefore, this study aims to summarize the prevalence of potential drug- drug interactions and associated factors in hospitals, both among hospitalized patients and outpatients in Ethiopia.Method Literature search was performed through accessing legitimate databases in PubMed/MEDLINE, Google Scholar and Research Gate for English-language publications. Advanced search strategies were applied in Science Direct and HINARI to identify any additional papers and published reviews and to retrieve relevant findings closely related to prevalence of potential drug- drug interactions and associated factors with it. The search was conducted from August 22-25, 2019 and all published and unpublished articles available online until the day of data collection were considered.Results A total of 14 studies were included for systematic review and meta-analysis. From 14 studies, 5761 patients were included and a total of 8717 potential drug- drug interactions were found in 3259 of patients. The prevalence patients with potential drug- drug interactions in Ethiopian Hospitals were found to be 72.2% (95% confidence interval: 59.1%, 85.3%). Based on severity, the prevalence of potential drug- drug interactions were 25.1%, 52.8%, 16.9% and 1.27% for major, moderate, minor potential drug- drug interactions and contraindications respectively. The factors associated with potential drug- drug interactions were related to patient characteristics such as polypharmacy, age, comorbid disease and hospital stay.Conclusion There is a high prevalence of potential drug- drug interactions in Ethiopian Hospitals. From this the most prevalent drug- drug interactions were moderate severity, 52.8%. Polypharmacy, age, comorbid disease and hospital stay were the risk factors associated with potential drug- drug interactions.