Your current regimen combines metformin, pioglitazone, and voglibose, which is a standard and safe approach for managing type 2 diabetes. While your fasting blood sugar (126 mg/dL) is within a fair range, your HbA1c of 8% and postprandial sugar (186 mg/dL) indicate that your blood glucose is slightly undercontrolled. Typically, we aim for an HbA1c below 7%. This suggests your current combination is appropriate, but the dosages may need a slight adjustment to optimize your control. Please consult your doctor to evaluate if a dosage modification or lifestyle adjustments are needed. Do not alter your doses without medical supervision.