Ultra rapid lispro (URLi) is a new insulin lispro formulation that has accelerated absorption and improved postprandial glucose control compared with insulin lispro (Humalog). The compatibility and safety of URLi versus lispro were evaluated in patients with type 1 diabetes using continuous subcutaneous insulin infusion (insulin pump). In this phase 3, double-blind, crossover study, 49 patients were randomized to two 6-week treatment periods, after a 2-week lead-in period on lispro. The primary endpoint was the rate of infusion set failures due to a pump occlusion alarm, or unexplained hyperglycemia with blood glucose >13.9 mmol/L (250 mg/dL) that did not decrease within 1 h after a correction bolus. There was no significant difference in the rate of infusion set failures between URLi and lispro (0.03 vs. 0.05 events/30 days,  = 0.375). A higher rate of premature infusion set changes was observed with URLi (1.13 vs. 0.78 events/30 days;  = 0.028), translating to one additional infusion set change approximately every 3 months. A trend toward improved glycemic control was observed with URLi treatment: Time in range 3.9-10.0 mmol/L (71-180 mg/dL) was 65.7% ± 1.3% versus 63.0% ± 1.3%. Treatment-emergent adverse events (TEAEs) were reported by 46.9% of patients on URLi treatment and 18.8% on lispro. This difference was driven by an increase in infusion site reactions-more than 90% were mild. Incidence of all other TEAEs and severe hypoglycemia was similar between treatments. URLi was compatible with insulin pump use with a safety profile similar to lispro.

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http://dx.doi.org/10.1089/dia.2020.0224DOI Listing

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