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  • Title: Fixed-Dose Combination of Dapagliflozin + Sitagliptin + Metformin in Patients with Type 2 Diabetes Poorly Controlled with Metformin: Phase 3, Randomized Comparison with Dual Combinations.
    Author: Sahay RK, Giri R, Shembalkar JV, Gupta SK, Mohan B, Kurmi P, Kumar SR, Sawardekar VM, Mishra A, Murthy LS, Arya VV, Sonawane AR, Soni PN, Gofne SK, Karnawat SR, Rajurkar MN, Patel PM, Lakhwani LK, Mehta SC, Joglekar SJ.
    Journal: Adv Ther; 2023 Jul; 40(7):3227-3246. PubMed ID: 37258803.
    Abstract:
    INTRODUCTION: This study compared efficacy and safety of triple drug fixed-dose combination (FDC) of dapagliflozin (DAPA) + sitagliptin (SITA) + metformin (MET) extended release (ER) with SITA + MET sustained release (SR) and DAPA + MET ER in patients with type 2 diabetes poorly controlled with metformin. METHODS: This phase 3, randomized, open-label, active-controlled study included adult patients with glycated hemoglobin (HbA1c) ≥ 8% (64 mmol/mol) and ≤ 11% (97 mmol/mol), randomized in 1:1:1 ratio to receive either FDC of DAPA + SITA + MET ER (10 mg + 100 mg + 1000 mg) tablets once daily (n = 137) or co-administration of SITA + MET SR (100 mg + 1000 mg) tablets once daily (n = 139) or FDC of DAPA + MET ER (10 mg + 1000 mg) tablets once daily (n = 139). Primary endpoint was mean change in HbA1c from baseline to week 16. RESULTS: Mean baseline HbA1c was approximately 9% (75 mmol/mol) in each treatment group. At week 16, adjusted mean reduction in HbA1c from baseline was significantly greater with DAPA + SITA + MET ER (- 1.73% [- 19.0 mmol/mol]) compared to SITA + MET SR (- 1.28% [- 14.1 mmol/mol]; difference of - 0.46% [- 5.1 mmol/mol], p < 0.001) and DAPA + MET ER (- 1.33% [- 14.6 mmol/mol]; difference - 0.4% [4.4 mmol/mol], p < 0.001). Similarly, at week 12, reduction in HbA1c from baseline was significantly greater with DAPA + SITA + MET ER compared to SITA + MET SR (p = 0.0006) and DAPA + MET ER (p = 0.0276). At week 16, DAPA + SITA + MET ER showed significant reduction in postprandial blood glucose compared to DAPA + MET ER (p = 0.0394) and significant reduction in fasting blood glucose with DAPA + SITA + MET ER compared to SITA + MET SR (p = 0.0226). The proportion of patients achieving HbA1c < 7.0% (53 mmol/mol) at week 16 was significantly higher with DAPA + SITA + MET ER (38.5%) versus SITA + MET SR (12.8%) (p < 0.001) and DAPA + MET ER (21.3%) (p = 0.0023). All study medications were well tolerated. CONCLUSION: Triple FDC of DAPA + SITA + MET ER tablets once daily was significantly better in achieving glycemic control versus dual combination once daily in patients with type 2 diabetes poorly controlled with metformin without any significant safety concerns. TRIAL REGISTRATION: CTRI/2021/11/038176, registered on 22 November 2021. Type 2 diabetes is a progressive disease in which the risks of microvascular and macrovascular complications and mortality are strongly associated with hyperglycemia. Achieving glycemic control remains the main goal of treatment to prevent these complications. Estimates in 2019 showed that 77 million individuals had diabetes in India, which is expected to rise over 134 million by 2045. Considering the progressive nature of the disease, many guidelines recommend use of dual or triple drug therapy based on glycated hemoglobin (HbA1c) level. Use of fixed-dose combination (FDC) helps to improve therapy compliance and can provide optimum therapeutic benefits. Mechanisms of action of dipeptidyl peptidase 4 (DPP4) and sodium–glucose cotransporter 2 (SGLT2) inhibitors are complementary to that of metformin with low risk of hypoglycemia. Studies have shown beneficial effects of adding both DPP4 inhibitors and SGLT2 inhibitors after metformin monotherapy. This phase 3 study was designed to assess efficacy and safety of triple FDC of dapagliflozin + sitagliptin + metformin extended release in comparison with combipack of sitagliptin + metformin sustained release and FDC of dapagliflozin + metformin ER in patients with type 2 diabetes inadequately controlled with metformin monotherapy. The study demonstrated superiority of triple FDC of dapagliflozin + sitagliptin + metformin ER over dual combinations in terms of reduction in HbA1c and percentage of patients achieving target HbA1c at the end of week 16. The current study provides evidence for considering triple FDC of dapagliflozin + sitagliptin + metformin ER as an alternative option with minimal risk of hypoglycemia and weight gain, while considering oral triple-combination therapy for patients to achieve their glycemic target.
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