Will metformin clear high blood sugar levels if it's taken after eating to many carbs?

Not very well. What's needed to help clear glucose from the blood after a meal is insulin. Metformin does not increase the amount of Insulin secreted, so it won't help much. It may help some, because it makes cells more responsive to whatever amount of Insulin is present. The best way to keep after-meal sugars down is to stick to the meal plan!. Light exercise may be helpful.

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