Background: This paper provides the first national analysis of antimicrobial use (AMU) of oral and parenteral dosages in Bangladesh, as well as biannual trends for the years from 2019 to 2023. It also analyzes the effect of the COVID-19 pandemic on AMU. Methods: AMU was analyzed in accordance with the WHO Anatomical Therapeutic Chemical classification and defined daily doses per 1000 inhabitants per day methodology. Data on antimicrobial medicine dispatched from manufacturers’ central warehouse was collected and categorized based on the WHO’s Access, Watch, and Reserve (AWaRe) classification. Findings: This AMU surveillance demonstrates an increase in the use of antimicrobial medicines from 2021 to 2022, and in 2023, it decreased, with our national AMU surveillance data indicating that cefixime and azithromycin were the most consumed antibiotics during this period. Most antibiotics used in Bangladesh are broad-spectrum ‘Watch’-category antibiotics. Among oral antibiotics, 50 to 67% are from the ‘Watch’-category. When considering only parenteral antibiotics, 70 to 91 % fall under the ‘Watch’-category. Third-generation cephalosporin consumption has been found to be higher than second- and first-generation cephalosporins. The oral antimicrobials are more commonly used than parenteral ones. AMU notably increased during the COVID-19 pandemic, especially in the case of systemic antibacterial use. Conclusions: To achieve the global target of 70% use of Access category antibiotics by 2030, the use of Watch-group antibiotics, like cefixime, azithromycin, ciprofloxacin, levofloxacin, and ceftibuten, needs to be reduced through investing in and strengthening stewardship programs and eliminating self-medication in Bangladesh. The findings of this study provide useful information to policymakers to tackle AMR in Bangladesh.