If your RBS is staying between 250 to 450 mg, it means your current medicines (Tripride + Metbay) are not controlling your sugar well enough. Do not change medicines on your own, but yes, your doctor will likely need to adjust the dose or switch to a stronger combination, or add medicines or even start insulin for a short period to bring sugars under control. Meanwhile, cut down sugar, walk 30 to 40 minutes daily, and stay hydrated. High sugar for too long can damage nerves, kidneys, and eyes, so acting early is important.