This is a single center, randomised, double-blind, active comparator controlled, three-period cross-over, single dose trial in subjects with type 1 diabetes mellitus.

This is a single center, randomised, double-blind, active comparator controlled, three-period cross-over, single dose trial in subjects with type 1 diabetes mellitus.

Each subject will be randomly allocated to a sequence of three treatments:(i) simultaneous administrations of BioChaperone® pramlintide human insulin (BC Pram Ins) and placebo, (ii) simultaneous injections of pramlintide (Symlin®) and human insulin (Humulin®) and (iii) simultaneous injections of insulin lispro (Humalog®) and placebo.

Subjects will come in a fasted state to the clinical trial centre in the morning, meal test procedures will be performed and subjects will stay at the clinical trial centre until the post-dose follow-up period has been terminated.

Inclusion Criteria:

• Male or female subjects aged 18-64 years (both inclusive)
• Type 1 diabetes mellitus (as diagnosed clinically) ≥ 12 months
• Treated with multiple daily insulin injections ≥ 12 months
• Treated with an evening dose of once-daily insulin glargine U100 at screening
• Fasting C-peptide ≤ 0.30 nmol/L

Exclusion Criteria:

• Known or suspected hypersensitivity to IMPs, paracetamol (acetaminophen) or related products
• Type 2 diabetes mellitus
• Clinically significant abnormal haematology, biochemistry, or urinalysis screening tests, as judged by the Investigator considering the underlying disease
• Presence of clinically significant acute gastrointestinal symptoms (e.g. nausea, vomiting, heartburn or diarrhoea), as judged by the Investigator
• Known slowing of gastric emptying, including gastroparesis, and or gastrointestinal surgery that in the opinion of the investigator might change gastrointestinal motility and food absorption
• Intake of medication known to affect gastrointestinal motility, including but not limited to erythromycin, metoclopramide, cisapride, cholestyramine or colestipol within 4 weeks before screening