Comparing Postprandial Glycemic Control Using Fiasp vs Insulin Aspart in Hospitalized Patients With Type 2 Diabetes

Hyperglycemia in hospitalized patients is associated with increased morbidity and mortality. Basal-bolus insulin therapy is the treatment of choice for most patients. The efficacy of an ultrarapid vs rapid-acting insulin in hospitalized patients with diabetes has not been evaluated. We assessed noninferiority in efficacy and safety of Fiasp vs aspart (Novolog) as part of a basal-bolus insulin regimen in noncritically ill patients with type 2 diabetes in a safety-net hospital.

This prospective, open-label, randomized trial included 137 patients with diabetes admitted to a non-intensive care unit setting. Subjects were treated with glargine at bedtime and either Fiasp or Novolog for prandial and correction insulin. Subjects were enrolled for a minimum of 4 or maximum of 6 meal boluses. Capillary blood glucose was used for insulin adjustment and a blinded Dexcom G6 Pro captured data for study analysis. The primary endpoint was time spent in sensor glucose range 100-180 mg/dL in the 4-hour postprandial period (assessed among 106 participants with ≥ 4 meals with a 4-hour postprandial period). Time spent in hypoglycemic ranges (<70, <54, <40 mg/dL) was assessed for safety.

Four-hour postprandial time in range 100-180 mg/dL was 45% in the Fiasp group vs 36% in the Novolog group (P = .012; meeting prespecified noninferiority criteria). Other glycemic metrics were similar between groups with no difference in time spent in hypoglycemic ranges.

Fiasp provides noninferior postprandial glucose control in hospitalized patients with type 2 diabetes when compared to Novolog with no increase in rates of hypoglycemia.