Change in clinical strategy

This study evaluates a new test formulation of a glucose lowering drug, insulin lispro, delivered by an insulin pump continuously under the skin. The study will be conducted in participants with type 1 diabetes mellitus to investigate how the human body processes the new test formulation and its effect on blood sugar levels when it is delivered via an insulin pump. Side effects and tolerability will be documented. The study will last about 4 to 11 weeks, including screening, lead-in and follow up. Screening is required within 28 days prior to entering the study.

Inclusion Criteria:

• Male or female participants with Type 1 Diabetes Mellitus (T1DM) who are receiving insulin therapy via an approved insulin pump
• Have a body mass index (BMI) of 18.5 to 33 kilogram per square meter (kg/m²), inclusive, at screening
• Have blood pressure, pulse rate, electrocardiogram (ECG), blood and urine laboratory test results that are acceptable for the study
• Have had no episodes of severe hypoglycemia in the past 6 months (requiring assistance in treatment by a second party)
• Have venous access sufficient to allow for blood sampling
• Have provided written consent and are willing to follow study procedures and commit to the study duration

Exclusion Criteria:

• Are currently participating in or completed a clinical trial within the last 30 days from a clinical trial or any other type of medical research judged to be incompatible with this study
• Have previously participated or withdrawn from this study
• Have or used to have health problems, laboratory test results, blood pressure or ECG readings that, in the opinion of the doctor, could make it unsafe to participate in the study
• Had blood loss of more than 500 milliliters (mL) within the last month