Please assess the completion status of the following clinical trial:

Trial Title: A Study to Investigate the Glucose Lowering Effects of Dextromethorphan Alone or in Combination With Sitagliptin in Subjects With Type 2 Diabetes Mellitus (T2DM) After an Oral Glucose Tolerance Test

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: CROSSOVER
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: DOUBLE
- Phase: PHASE2
- Number of Arms: 8.0

Eligibility Criteria:
Inclusion Criteria:~1. Signed and dated written informed consent obtained before any study-related activities~2. Male subjects with a diagnosis of type 2 diabetes mellitus according to ADA criteria at least 4 months prior to screening~3. Medical history without major pathology (with the exception of type 2 diabetes)~4. On a stable regimen of metformin monotherapy for at least 3 months~5. Aged between 45 and 70 years of age, both inclusive~6. Body mass index (BMI) between 25 and 35kg/m2, both inclusive~Exclusion Criteria:~1. Subjects with type 1 diabetes, MODY or secondary forms of diabetes such as due to pancreatitis~2. History of pancreatitis~3. Current or previous treatment with insulin therapy~4. Treatment with any hypoglycemic medication other than metformin within the three months prior to screening~5. Mean QTc\> 450 msec

- Gender: MALE
- Minimum Age: 45 Years
- Maximum Age: 70 Years
- Healthy Volunteers: f

Study Arms:
- Sitagliptin (Type: ACTIVE_COMPARATOR): Placebo dextromethorphan + sitagliptin 100 mg
- Dextromethorphan 30 mg + sitagliptin (Type: EXPERIMENTAL): Dextromethorphan 30 mg + sitagliptin 100 mg
- Dextromethorphan 60 mg + sitagliptin (Type: EXPERIMENTAL): Dextromethorphan 60 mg + sitagliptin 100 mg
- Dextromethorphan 90 mg + sitagliptin (Type: EXPERIMENTAL): Dextromethorphan 90 mg + sitagliptin 100 mg
- Dextromethorphan 30 mg + placebo (Type: EXPERIMENTAL): Dextromethorphan 30 mg + placebo (sitagliptin)
- Dextromethorphan 60 mg + placebo (Type: EXPERIMENTAL): Dextromethorphan 60 mg + placebo (sitagliptin)
- Dextromethorphan 90 mg + placebo (Type: EXPERIMENTAL): Dextromethorphan 90 mg + placebo (sitagliptin)
- Placebo (Type: PLACEBO_COMPARATOR): Placebo (dextromethorphan)+ placebo (sitagliptin)

Based on this trial design, predict the completion outcome and termination type (if applicable).