Combined Insulin and GLP-1 Receptor Agonists: Simplifying Treatment or Adding Obstacles?

The US Food and Drug Administration recently approved 2 combination products containing a basal insulin and a glucagon-like peptide 1 receptor agonist: insulin glargine/lixisenatide and insulin degludec/liraglutide. These agents were shown to be noninferior in lowering hemoglobin A_1c compared to basal insulin and are indicated for patients inadequately controlled on basal insulin or glucagon-like peptide 1 receptor agonists alone. The clinical implications of these agents are unclear due to limitations in the clinical trials and limited recommendations in current guidelines. While these agents may provide financial and adherence benefits, their role is likely limited to the outpatient setting. With the availability of these agents, concerns with transitions of care arise due to multiple vulnerabilities in reconciling these agents throughout the inpatient admission and discharge process. Provider awareness of the availability and dosing of insulin glargine/lixisenatide and insulin degludec/liraglutide is essential to reduce errors in the medication reconciliation process.