| E.1 Medical condition or disease under investigation | 
| E.1.1 | Medical condition(s) being investigated  | 
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| E.1.1.1 | Medical condition in easily understood language  | 
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| E.1.1.2 | Therapeutic area  | Diseases [C] - Nutritional and Metabolic Diseases [C18] | 
| MedDRA Classification | 
| E.1.2 Medical condition or disease under investigation | 
| E.1.2 | Version  | 18.1 | 
 
| E.1.2 | Level  | PT | 
 
| E.1.2 | Classification code  | 10067584 | 
 
| E.1.2 | Term  | Type 1 diabetes mellitus | 
 
| E.1.2 | System Organ Class  | 10027433 - Metabolism and nutrition disorders | 
 
 
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| E.1.3 | Condition being studied is a rare disease  |  No  | 
| E.2 Objective of the trial | 
| E.2.1 | Main objective of the trial  | 
To compare the pharmacodynamic profile of Toujeo with Tresiba in steady state in a euglycemic clamp after 8 days once daily dosing regimen at 2 dose levels in T1DM patients
 
 
 | 
 
 
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| E.2.2 | Secondary objectives of the trial  | 
To compare the pharmacokinetic profile of Toujeo with Tresiba in steady state in a euglycemic clamp after 8 days once daily dosing regimen at 2 dose levels in T1DM patients
 
 To assess safety and tolerability of Toujeo and Tresiba in 8 days once daily dosing regimen at 2 dose levels in T1DM patients.  | 
 
 
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| E.2.3 | Trial contains a sub-study  |  No  | 
| E.3 | Principal inclusion criteria  | 
-Male or female subjects with T1DM for more than 1 year.
 -Total insulin dose of <1.2 U/kg/day.
 -Fasting negative serum C-peptide (<0.30 nmol/L).
 -Glycohemoglobin (HbA1c) ≤9%. 
 -Stable insulin regimen for at least 2 months prior to study.
 -Normal findings in medical history and physical examination (cardiovascular system, chest and lungs, thyroid, abdomen, nervous system, skin and mucosae, and musculoskeletal system), vital signs, electrocardiogram (ECG), and safety laboratory.
 
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| E.4 | Principal exclusion criteria | 
-Any history or presence of clinically relevant cardiovascular, pulmonary, gastrointestinal, hepatic, renal, metabolic (apart from T1DM), hematological, neurological, psychiatric, systemic (affecting the body as a whole), ocular, gynecologic (if female), or infectious disease; any acute infectious disease or signs of acute illness or any history or presence of heparin induced thrombocytopenia Type II (HIT-type II). 
 -More than 1 episode of severe hypoglycemia with seizure, coma, or requiring assistance of another person during the past 6 months.
 -Frequent severe headaches and/or migraine, recurrent nausea and/or vomiting (more than twice a month).
 -Symptomatic hypotension (whatever the decrease in blood pressure), or asymptomatic postural hypotension defined by a decrease in systolic blood pressure equal to or greater than 20 mmHg within three minutes when changing from the supine to the standing position.
 -Presence or history of a drug allergy or clinically significant allergic disease according to the Investigator’s judgment.
 -Likelihood of requiring treatment during the study period with drugs not permitted by the clinical study protocol.
 -Any medication (including medicine containing St. John’s Wort) within 14 days before inclusion, or within 5 times the elimination half-life or pharmacodynamic half-life of that drug, whichever the longest and regular use of any medication other than insulins in the last month before study start with the exception of thyroid hormones, lipid-lowering and antihypertensive drugs, and, if female, with the exception of hormonal contraception or menopausal hormone replacement therapy; any vaccination within the last 28 days.
 -Positive reaction to any of the following tests: hepatitis B surface (HBs Ag) antigen, anti-hepatitis C virus (anti-HCV) antibodies, anti-human immunodeficiency virus 1 and 2 antibodies (anti-HIV1 and anti HIV2 Ab), human immunodeficiency virus 1 antigen (HIV1 Ag).
 
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| E.5 End points | 
| E.5.1 | Primary end point(s) | 
| Individual fluctuation of the smoothed glucose infusion rate (GIR)0-24 in steady state (GIR-smFL0-24) | 
 
 
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| E.5.1.1 | Timepoint(s) of evaluation of this end point | 
 | 
| E.5.2 | Secondary end point(s) | 
- Glucose infusion rate (GIR) over time during steady state clamp conditions
 - Pharmacokinetics of insulin glargine
 - Pharmacokinetics of insulin degludec
 - Number (%) of patients with treatment emergent adverse events | 
 
 
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| E.5.2.1 | Timepoint(s) of evaluation of this end point | 
24 hours
 - Glucose infusion rate (GIR) over time during steady state clamp conditions
 - Pharmacokinetics of insulin glargine
 - Pharmacokinetics of insulin degludec
 
 
 22 days
 - Number (%) of patients with treatment emergent adverse events | 
 
 
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| E.6 and E.7 Scope of the trial | 
| E.6 | Scope of the trial | 
| E.6.1 | Diagnosis |  No  | 
| E.6.2 | Prophylaxis |  No  | 
| E.6.3 | Therapy |  No  | 
| E.6.4 | Safety |  Yes  | 
| E.6.5 | Efficacy |  No  | 
| E.6.6 | Pharmacokinetic |  Yes  | 
| E.6.7 | Pharmacodynamic |  Yes  | 
| E.6.8 | Bioequivalence |  No  | 
| E.6.9 | Dose response |  No  | 
| E.6.10 | Pharmacogenetic |  No  | 
| E.6.11 | Pharmacogenomic |  No  | 
| E.6.12 | Pharmacoeconomic |  No  | 
| E.6.13 | Others |  No  | 
| E.7 | Trial type and phase | 
| E.7.1 | Human pharmacology (Phase I) |  No  | 
| E.7.1.1 | First administration to humans |  No  | 
| E.7.1.2 | Bioequivalence study |  No  | 
| E.7.1.3 | Other |  No  | 
| E.7.1.3.1 | Other trial type description |  | 
| E.7.2 | Therapeutic exploratory (Phase II) |  No  | 
| E.7.3 | Therapeutic confirmatory (Phase III) |  No  | 
| E.7.4 | Therapeutic use (Phase IV) |  Yes  | 
| E.8 Design of the trial | 
| E.8.1 | Controlled |  Yes  | 
| E.8.1.1 | Randomised |  Yes  | 
| E.8.1.2 | Open |  No  | 
| E.8.1.3 | Single blind |  No  | 
| E.8.1.4 | Double blind  |  Yes  | 
| E.8.1.5 | Parallel group |  Yes  | 
| E.8.1.6 | Cross over  |  Yes  | 
| E.8.1.7 | Other |  No  | 
| E.8.2 |  Comparator of controlled trial | 
| E.8.2.1 | Other medicinal product(s) |  Yes  | 
| E.8.2.2 | Placebo  |  No  | 
| E.8.2.3 | Other |  No  | 
| E.8.2.4 | Number of treatment arms in the trial | 2 | 
| E.8.3 | 
                                The trial involves single site in the Member State concerned
                             |  Yes  | 
| E.8.4 |  The trial involves multiple sites in the Member State concerned  |  No  | 
| E.8.5 | The trial involves multiple Member States |  No  | 
| E.8.6 Trial involving sites outside the EEA | 
| E.8.6.1 | Trial being conducted both within and outside the EEA |  No  | 
| E.8.6.2 | Trial being conducted completely outside of the EEA |  No  | 
| E.8.7 | Trial has a data monitoring committee |  No  | 
| E.8.8 | 
                        Definition of the end of the trial and justification where it is not the last
                        visit of the last subject undergoing the trial
                     | 
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| E.8.9 Initial estimate of the duration of the trial | 
| E.8.9.1 | In the Member State concerned years |  | 
| E.8.9.1 | In the Member State concerned months | 4 | 
| E.8.9.1 | In the Member State concerned days |  |