Detailed Metformin dosage information for adults and children. Includes dosages for Diabetes Type 2; plus renal, liver and dialysis adjustments. Metformin is a diabetes medication that helps control blood sugar levels. Here’s how to dose metformin, how to make adjustments, and potential risk factors for adults. This article describes the dosages of metformin, as well as its strengths and how to take it. When taking metformin, always follow the dosage prescribed by your doctor. Learn how metformin treats type 2 diabetes, including dosage, side effects, warnings, and its off-label use for weight loss and PCOS. Reviewed drug info NHS medicines information on dosage for metformin, how to take it and what to do if you miss a dose or take too much. Metformin alone: At first, 5 milliliters (mL) two times a day, or 8.5 mL once a day with meals. Your doctor may increase your dose if needed until your blood sugar is controlled. A complete metformin dosage chart for diabetes, prediabetes, weight loss, and PCOS, plus immediate-release vs extended-release schedules and titration. Typically, metformin treatment starts with a lower dose, such as 500 milligrams (mg) twice daily or 850 mg once daily. The exact dosage is tailored based on individual health factors under the guidance of a healthcare professional. For adults, the daily metformin dosage should not exceed 2,550 mg. Our comprehensive metformin dosage guide and chart breaks down starting doses, maximum limits, and timing recommendations for both immediate-release and extended-release formulations. The metformin dose calculator instantly shows your recommended dose, maximum dose, timing, and personalized recommendations. The metformin dosage chart tool provides a clear week-by-week schedule from starting dose to maintenance therapy.