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Sumintani, S., Morita, S., Utsu, Y., Mukai, K., Miki, S., Sato, B., Nakamura, H. and Kasayama, S. (2012) Effectiveness of Metformin and Lifestyle Interventions as an Initial Treatment in Japanese Patients with Observational Study. The Journal of Medical Investigation, 59, 166-173.
http://dx.doi.org/10.2152/jmi.59.166

has been cited by the following article:

• TITLE: Quantifying the Effect of Metformin 1000 mg/day in Japanese Patients with Type 2 Diabetes

  AUTHORS: Katsunori Suzuki, Taishi Yoshioka, Yoko Wakui

  KEYWORDS: High-Dose Metformin, Type 2 Diabetes, HbA1c

  JOURNAL NAME: International Journal of Clinical Medicine, Vol.5 No.15, August 7, 2014

  ABSTRACT: Objective: To examine the effect of high-dose metformin on glucose metabolism in Japanese patients with type 2 diabetes. Method: A total of 144 patients with type 2 diabetes who could be followed up for 6 months after their dose of metformin was increased to 1000 mg/day (from 750 mg/day or less) were examined. The dose of metformin was increased from 750 mg/day in 70 subjects (250-mg dose increase) and from 500 mg/day in 74 subjects (500-mg dose increase). Results: After the dose increased to 1000 mg/day, HbA1c was significantly decreased by 0.65% ± 0.7%, 0.42% ± 0.5%, and 0.87% ± 0.7% in all subjects, the 250-mg dose increase group, and the 500-mg dose increase group, respectively. No significant change was observed in weight. Analysis by BMI (2 and ≥25 kg/m2) revealed a comparable significant decrease in HbA1c in all subjects, the 250-mg dose increase group, and the 500-mg dose increase group. Analysis by duration of diabetes showed a significant decrease in HbA1c regardless of the duration. Conclusion: Increasing the metformin dose to 1000 mg/day showed a significant antihyperglycemic effect over 6 months in Japanese patients with type 2 diabetes. Blood glucose improved regardless of the duration of diabetes or the presence or absence of obesity. Overall tolerability was favorable.