| E.1 Medical condition or disease under investigation | 
| E.1.1 | Medical condition(s) being investigated | 
| Type 2 diabetes mellitus. |  
| Typ 2 diabetes mellitus. |  | 
| E.1.1.1 | Medical condition in easily understood language | 
| Type 2 diabetes mellitus. |  
| Typ 2 diabetes mellitus |  | 
| E.1.1.2 | Therapeutic area | Diseases [C] - Hormonal diseases [C19] | 
| MedDRA Classification | 
| 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 examine the acute effect of sitagliptin as a single dose on insulin and glucose levels after ingestion of a standardized mixed meal in men with type 2 diabetes. |  | 
| E.2.2 | Secondary objectives of the trial | 
| To examine the acute effect of sitagliptin as a single dose on glucagon, activa and total GIP, activa and total GLP-1 levels and insulin secretory rate after ingestion of a standardized mixed meal in men with type 2 diabetes. |  | 
| E.2.3 | Trial contains a sub-study | No | 
| E.3 | Principal inclusion criteria | 
| •	Caucasian men with type 2 diabetes diagnosed according to ICD10 •	Ongoing treatment with life style adjustment or life style adjustment together with metformin as oral antidiabetic . Metformin therapy should not exceed 2 grams daily
 •	Age 20-75 years
 •	HbA1c ≤80 mmol/mol
 •	BMI: 20-40 kg/m2
 •	Written informed consent has been given
 •	Capability and willingness to participate in the whole study
 
 |  | 
| E.4 | Principal exclusion criteria | 
| •	Liver disease or ALAT three times above upper reference range •	Diabetic nephropathy (GFR < 50 ml/min/1.73 m2 or albuminuria)
 •	Proliferative diabetic retinopathy
 •	Treatment with any glucose-lowering medication except metformin
 •	Previous myocardial infarction, coronary heart disease or insatiable angina pectoris in the last 6 months.
 •	Previous surgery on the gastrointestinal tract
 •	Larger surgical intervention during the last 12 weeks
 •	Treatment with oral steroids or thiazide diuretics
 •	Treatment with digoxin
 •	Smokers
 •	Participation in another study the last 4 weeks
 •	Paracetamol intolerance
 
 |  | 
| E.5 End points | 
| E.5.1 | Primary end point(s) | 
| •	The area under the 180 min curves for plasma insulin concentrations •	The area under the 180 min curves for plasma glucose
 
 |  | 
| E.5.1.1 | Timepoint(s) of evaluation of this end point | 
| 0-180 min after meal ingestion |  | 
| E.5.2 | Secondary end point(s) | 
| -	The area under the 180 min curves for glucagon, total and intact GIP and total and intact GLP-1 concentrations -	The area under the 30  min curves for insulin, glucagon, total and intact GIP and total and intact GLP-1 concentrations
 -	Ratio of area under the curves (180 min) for intact to total GIP and GLP-1
 -	Insulin secretion rate and glucose sensitivity of the ß-cells as determined by C-peptide convolution of the data.
 
 |  | 
| E.5.2.1 | Timepoint(s) of evaluation of this end point | 
| 0-180 min after meal ingestion |  | 
| 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 | No | 
| E.6.5 | Efficacy | No | 
| E.6.6 | Pharmacokinetic | No | 
| 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 | No | 
| E.8.1.2 | Open | Yes | 
| E.8.1.3 | Single blind | No | 
| E.8.1.4 | Double blind | No | 
| E.8.1.5 | Parallel group | No | 
| E.8.1.6 | Cross over | No | 
| 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 | 
| The end of the trial is the last visit of the last patient. |  | 
| 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 |  | 
| E.8.9.1 | In the Member State concerned days |  |