Suppressive antibiotic treatment (SAT) in the era of MDRO infections: a narrative review.

Introduction: Antibiotics were originally developed to treat acute bacterial infections, and research studies focus their efforts on safety and efficacy in the short term; however, prolonged course of antibiotics has been documented in multiple clinical settings. The aim of this narrative review is to provide a new perspective on SAT and to discuss new therapeuticpossibilities.

Areas covered: We discuss new clinical scenarios in which SAT could be considered. We provided a broad discussion about long-acting agents and new or repurposed oral agents as well as the use of OPAT with elastomeric pumps and an overview of the pipeline of new antifungals. Limitations of SAT are presented in this review and especially patients' adherence issues, possible spread of MDROs, possible rising of the incidence of Clostridioides difficile infections, drug-to-drug interactions and drug-related problems, cost-effectiveness evaluation issues.

Expert opinion: Many research gaps are evident and further studies are needed. Above all, the efficacy and safety of SAT in the different clinical scenarios. Discovery of new molecules against MDROs and ongoing research on PK/PD variables as well as a better understanding of the relationship between SAT and the emergence of resistance could improve SAT usage and reduce the impact of DRPs.