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  • Title: Both glimepiride and high-dose metformin are important for sustained glucose lowering in Japanese type 2 diabetes patients on glimepiride-sitagliptin-metformin therapy: subanalysis of a single-center, open-label, randomized study.
    Author: Arai K, Maeda H, Shirabe S, Yamamoto R, Kumakura A, Yamauchi M, Hirao T, Hirao S, Hirao K.
    Journal: Diabetes Technol Ther; 2014 Jul; 16(7):442-6. PubMed ID: 24528246.
    Abstract:
    BACKGROUND: In a previous single-center, open-label randomized 3-month study of triple oral antidiabetes drug (OAD) therapy, we investigated factors affecting the glycemic control afforded by sitagliptin, high-dose metformin, and low-dose glimepiride. Patients were prospectively assigned to either Group 1 (50% reduction in metformin) or Group 2 (discontinuation of glimepiride) and compared. The results showed that the glycated hemoglobin (HbA1c) levels of patients in Group 2 deteriorated more than those in Group 1, whereas HbA1c levels were maintained in some patients in both groups. MATERIALS AND METHODS: To determine the factors associated with maintenance of HbA1c under this triple OAD regimen, data from the prospective study were further analyzed. RESULTS: In both Groups 1 and 2, the baseline HbA1c level was higher in patients with HbA1c ≥7.0% after 3 months of treatment than those with an HbA1c level of <7.0%. A generalized linear model revealed that high-dose metformin was associated with a deterioration of HbA1c levels in Group 2. CONCLUSIONS: Together, the findings indicate that glimepiride and high-dose metformin are important for sustained glycemic control in triple OAD therapy with sitagliptin, metformin, and sulfonylurea.
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