Completed

Dapagliflozin and Metformin Combination for Type 2 Diabetes Control

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Study Aim

This study aims to evaluate the effectiveness of a combination treatment using Dapagliflozin and Metformin in reducing Hemoglobin A1c levels in individuals with Type 2 Diabetes over a period of 24 weeks.

What is being tested

Dapagliflozin

+ Metformin XR

+ metformin HCl Modified Release matching Placebo

Drug
Who is being recruted

Diabetes Mellitus+3

+ Diabetes Mellitus, Type 2

+ Endocrine System Diseases

From 18 to 77 Years
See all eligibility criteria
How is the trial designed

Treatment Study

Phase 3
Interventional
Study Start: April 2009
See protocol details

Summary

Principal SponsorAstraZeneca
Last updated: January 27, 2026
Sourced from a government-validated database.Claim as a partner

Study start date: April 1, 2009

Actual date on which the first participant was enrolled.

The primary purpose of this study is to compare the change from baseline in hemoglobin A1C achieved with dapagliflozin 10 mg in combination with metformin XR as compared with metformin XR monotherapy and compared with Dapagliflozin monotherapy, after 24 weeks of oral administration of double-blind treatment. The safety of treatment with dapagliflozin will also be assessed in this study

Official TitleA Multicenter, Randomized, Double-Blind, Active Controlled, Parallel Group, Phase 3 Trial to Evaluate the Safety and Efficacy of Dapagliflozin 10 mg in Combination With Metformin as Initial Therapy as Compared With Dapagliflozin 10 mg Monotherapy and Metformin Monotherapy in Subjects With Type 2 Diabetes Who Have Inadequate Glycemic Control
NCT00859898
Principal SponsorAstraZeneca
Last updated: January 27, 2026
Sourced from a government-validated database.Claim as a partner

Protocol

This section provides details of the study plan, including how the study is designed and what the study is measuring.
Design Details

1093 patients to be enrolled

Total number of participants that the clinical trial aims to recruit.

Treatment Study

These studies test new ways to treat a disease, condition, or health issue. The goal is to see if a new drug, therapy, or approach works better or has fewer side effects than existing options.



Eligibility

Researchers look for people who fit a certain description, called eligibility criteria: person's general health condition or prior treatments.
Conditions
Criteria

Any sex

Biological sex of participants that are eligible to enroll.

From 18 to 77 Years

Range of ages for which participants are eligible to join.

Healthy volunteers not allowed

If individuals who are healthy and do not have the condition being studied can participate.

Conditions

Pathology

Diabetes MellitusDiabetes Mellitus, Type 2Endocrine System DiseasesMetabolic DiseasesNutritional and Metabolic DiseasesGlucose Metabolism Disorders

Criteria

Inclusion Criteria: * Treatment naive males and females, \>= 18 years old and \<= 77 years old, with type 2 diabetes mellitus * Subjects must have central laboratory pre-randomization hemoglobin A1C \>= 7.5 and \<= 12.0% * C-peptide \>= 1.0 ng/mL (0.34 nmol/L) * Body Mass Index \<= 45 kg/m2 * Must be able to perform self monitoring of blood glucose Exclusion Criteria: * aspartate aminotransferase (AST) and/or alanine aminotransferase (ALT) \>3X\*upper limit of normal (ULN) * Serum Total bilirubin \>2 mg/dL (34.2 µmol/L) * Creatinine kinase \>3\*ULN * Serum creatinine \>= 1.50 mg/dL (133 µmol/L) for male subjects, \>= 1.40 mg/dL (124 µmol/L) for female subjects * Calcium value outside of the central laboratory normal reference range * Currently unstable or serious cardiovascular, renal, hepatic, hematological, oncological, endocrine, psychiatric, or rheumatic diseases * Urine albumin:creatinine ratio (UACR) \>1800 mg/g (203.4 mg/mmol Cr) * Severe uncontrolled hypertension defined as systolic blood pressure (SBP) \>=180 mmHg and/or diastolic blood pressure (DBP) \>=110 mmHg * Hemoglobin \>=11.0 g/dL (110 g/L) for men; hemoglobin \>=10.0 g/dL (100 g/L) for women * Positive for hepatitis B surface antigen * Positive for anti-hepatitis C virus antibody * History of diabetes insipidus * History of diabetic ketoacidosis or hyperosmolar nonketotic coma * Symptoms of poorly controlled diabetes that would preclude participation in this trial

Study Plan

Find out more about all the medication administered in this study, their detailed description and what they involve.
Treatment Groups
Study Objectives

3 intervention groups are designated in this study

This study does not include a placebo group 

Treatment Groups

Group I

Experimental
Dapagliflozin: Tablets, Oral, 10 mg, once daily, 24 weeks Metformin XR: Tablets, Oral, up to 2000 mg, once daily, 24 weeks

Group II

Experimental
Dapagliflozin: Tablets, Oral, 10 mg, once daily, 24 weeks. Placebo: Metformin HCl Modified Release matching placebo tablets, once daily, 24 weeks.

Group III

Active Comparator
Metformin XR: Tablets, Oral, 500 mg up to 2000 mg, once daily 24 weeks Placebo: Dapagliflozin matching placebo tablets once daily, 24 weeks

Study Objectives

Primary Objectives

Secondary Objectives

Study Centers

These are the hospitals, clinics, or research facilities where the trial is being conducted. You can find the location closest to you and its status.

This study has 123 locations

Suspended

International Institute Of Clinical Research

Ozark, United StatesOpen International Institute Of Clinical Research in Google Maps
Suspended

Clinical Research Advantage, Inc./Mesa Family Med Ctr, Pc

Tempe, United States
Suspended

Clinical Research Advantage, Inc.

Tempe, United States
Suspended

John Muir Physician Network Clinical Research Center

Concord, United States
Completed123 Study Centers