Drug utilization evaluation of ceftazidime-avibactam in a tertiary care hospital

Background: The World Health Organization considers antimicrobial resistance a major global threat, and ceftazidime-avibactam (CAZ-AVI) is a treatment for multidrug-resistant Gram-negative infections. The FDA approved its use in 2015 for infections with limited treatment options. Methods: A retrospective study was conducted in a hospital in India to analyse the use of CAZ-AVI formulation in patients. Data was collected from electronic records and included information on patient demographics, clinical and microbiological profiles, antibiotic treatment, and patient outcomes for those in the ICU. Results: A total of 110 patients were included in the study. On assessing the results of this study, it was found that, the median age of population who received CAZ-AVI was 63 years and hypertension, diabetes mellitus were the common comorbidities present in the patients. Out of 110 subjects, 66 (60%) patients were started with a high-end antibiotic as an empirical therapy. While analysing the resistance pattern, it was found that 22 (20%) were resistant and 84 (76%) of the study subjects were sensitive to ceftazidime-avibactam. There was higher clinical success for BSI, CUTI, VAP amongst the indications of CAZ-AVI and combination of CAZ-AVI with aztreonam has given the most successful treatment outcome. The combination of CAZ-AVI with one or two high end antibiotics was observed as a common clinical practice. Conclusions: The analysis of results showed encouraging clinical cure rates. Our study results suggest that ceftazidime-avibactam could be an effective standard therapy for managing MDR Gram -negative organisms.