A Research Study of How Faster-acting Insulin Aspart Moves Into, Through, and Out of the Body and How it Works in the Body When Given Through an Insulin Pump to People With Type 1 Diabetes

A Trial Investigating the Pharmacokinetic and Pharmacodynamic Properties of Faster-acting Insulin Aspart When Administered as a Bolus in a Continuous Subcutaneous Infusion Regimen in Subjects With Type 1 Diabetes

The aim of the study is to compare the pharmacokinetics (i.e. the course of the blood concentrations of the administered trial drug) of faster-acting insulin aspart (faster aspart), and the currently marketed formulation of insulin aspart (NovoRapid®) when given as a bolus using an insulin pump in people with type 1 diabetes. The pharmacodynamic response (i.e. the course of the blood sugar lowering effect of the administered trial drug) and the safety and tolerability of faster aspart and NovoRapid® will also be assessed.

The participants will be in the study for approx. 21 days. Each participant will have 5 visits to the clinic, with an overnight stay at both dosing visits. Participants will have a number of tests, and they will have to give blood and urine samples.

Inclusion Criteria:

• Male or female aged 18 - 64 years (both inclusive) at the time of signing informed consent.
• Type 1 diabetes mellitus (as diagnosed clinically) for 12 months or longer.
• Body mass index 18.5 - 28.0 kg/sqm (both inclusive).
• Treated with multiple daily insulin injections or continuous subcutaneous insulin infusion (CSII) for 12 months or longer.

Exclusion Criteria:

• Subject who has donated any blood or plasma in the past month or more than 500 mL within 3 months prior to screening.
• Smoker (defined as a subject who is smoking at least one cigarette, cigar or pipe daily).
• Not able or willing to refrain from smoking and use of nicotine substitute products during the inpatient period.