A Phase IV Study in Drug-Naive Patients With T2DM in China

Inclusion Criteria: 1. Diagnosed within the past 12 months with T2DM according to 1999 World Health Organization(WHO) criteria. 2. Men and women aged at least 18 years at screening. 3. Either not received oral anti-diabetic drugs or had been on short-term (1 month) treatment that had been discontinued 3 months before enrolment. 4. HbA1c ≥ 7.5% and ≤ 10.5% at screening and HbA1c ≥ 7.0% and ≤ 10.5% at pre-randomization visit. 5. FPG ≤ 13.3 mmol/L (≤ 240 mg/dL) . 6. BMI≥18.5 kg/m2 and ≤ 45.0 kg/m2 . 7. C-peptide ≥0.33nmol/L(≥1.0 ng/mL). 8. Able and willing to provide written informed consent and to comply with the study. Exclusion Criteria: 1. Women who are pregnant, intending to become pregnant during the study period, currently lactating females, or women of child-bearing potential not using highly effective, medically approved birth control methods. 2. Diagnosis or history of: a. Acute metabolic diabetic complications such as ketoacidosis or hyperglycemic hyperosmolar state b. Diabetes insipidus. 3. Requirement for insulin therapy. Symptoms of poorly controlled diabetes, including but not limited to, marked polyuria and polydipsia with \>10% weight loss during the 3 months before enrollment. 4. Triglycerides (fasting) \> 9.3 mmol/L (\> 800 mg/dL). 5. Patients with clinically apparent hepatobiliary disease, including but not limited to chronic active hepatitis and/or severe hepatic insufficiency. Alanine Aminotransferase(ALT) or Aspartate Aminotransferase(AST) \> 3x upper limit of normal (ULN), or serum total bilirubin (TB) \>34.2 μmol/L (\>2 mg/dL). 6. Patients with following renal disease history or renal disease related features: 1. History of unstable or rapidly progressing renal disease; 2. Patients with moderate /severe renal impairment or end-stage renal disease (eGFR\< 60 mL/min/1.73 m2); 3. Urinary albumin: creatinine ratio \>1800 mg/g; 4. Serum creatinine (Cr) ≥133 μmol/L (≥1.50 mg/dL) for male subjects; Serum Cr≥124 μmol/L (≥1.40 mg/dL) for female subjects; 5. Conditions of congenital renal glycosuria. 7. Severe uncontrolled hypertension defined as SBP ≥180 mmHg and/or BP ≥110 mmHg; Patients with SBP \< 95mmHg. 8. Any of the following cardiovascular diseases within 6 months of the enrollment visit: 1. Myocardial infarction; 2. Cardiac surgery or revascularization (coronary artery bypass graft/percutaneous transluminal coronary angioplasty); 3. Unstable angina; 4. Congestive heart failure New York Heart Association Class III or IV; 5. Transient ischemic attack or significant cerebrovascular disease. 9. History of gastrointestinal disease or surgery including Roemheld Syndrome, severe hernia, intestinal obstruction, intestinal ulcer, gastroenterostomy, enterectomy, bariatric surgery or lap-band procedure. 10. Malignancy within 5 years of the enrollment visit (with the exception of treated basal cell or treated squamous cell carcinoma). 11. Known immunocompromised status, including but not limited to, individuals who had undergone organ transplantation or acquired immunodeficiency syndrome (AIDS). 12. Any subject who, in the judgment of the investigator, was at risk for dehydration or volume depletion that might affect the interpretation of efficacy or safety data. 13. History of bone fracture secondary to diagnosed severe osteoporosis. 14. Currently unstable or serious cardiovascular, renal, hepatic, hematologic, oncologic, endocrine, psychiatric, or rheumatic diseases as judged by the Investigator. 15. Replacement or chronic systemic corticosteroid therapy, defined as any dose of systemic corticosteroid taken for \>4 weeks within 3 months before enrollment visit. 16. Administration of sibutramine, phentermine, orlistat, rimonabant, benzphetamine, diethylpropion, methamphetamine, or phendimetrazine within 30 days of enrollment visit. 17. Any subject who was currently abusing alcohol or other drugs or had done so within the last 6 months. 18. Donation of blood or blood products, blood transfusion, or participation in a clinical study requiring withdrawal of \>400 mL of blood during the 6 weeks before the enrollment visit. 19. History of hypersensitivity reaction to dapagliflozin or acarbose. Allergies or contraindication to the contents of dapagliflozin tablets or acarbose tablets. 20. Previous participation in a clinical trial with dapagliflozin. 21. Administration of any other investigational drug within 30 days of planned enrollment to this study, or within 5 half-life periods of other investigational drugs. 22. Subject is, in the judgment of the Investigator, unlikely to comply with the protocol or has any severe concurrent medical or psychological condition that may affect the interpretation of efficacy or safety data.