The addition of Biochaperone to insulin lispro may accelerate the onset and shorten the duration of action of insulin lispro due to a facilitation of the absorption of the insulin after subcutaneous injection.

The aim of the trial is to assess the efficacy and safety of BioChaperone insulin lispro in subjects with Type 1 diabetes under a dose of 0.2 U/Kg.

This trial is a single-center, randomised, double-blinded, two-treatment, two-period cross-over, 6-hour euglycaemic glucose clamp trial in subjects with Type 1 diabetes mellitus. Each subject will be randomly allocated to a single dose of BioChaperone insulin lispro 0.2 U/Kg and a single dose of Humalog® 0.2 U/Kg on 2 separate dosing visits.

Inclusion Criteria:

• Type 1 diabetes mellitus for at least 12 months.
• Treated with multiple daily insulin injections or insulin pump for at least 12 months.
• Body Mass Index (BMI): 18.0-28.0 Kg/m².

Exclusion Criteria:

• Type 2 diabetes mellitus.
• Receipt of any investigational product within 3 months prior to first dosing.
• Clinically significant abnormalities as judged by the investigator.
• Any systemic treatment with drugs known to interfere with glucose metabolism.
• History of alcoholism, or drug/chemical abuse as per Investigator's judgement.
• Use of tobacco or nicotine-contained product within 5 years prior to screening.
• Blood or plasma donation in the past month or more than 500 mL within 3 months prior to screening.