Your blood sugar levels (Fasting: 221 mg/dL, Post-meal: 310 mg/dL) are significantly high and require immediate medical attention. Since you have had diabetes for 5 years, your current treatment plan needs adjustment. I cannot prescribe specific medications without evaluating your kidney function, liver function, and HbA1c levels. Depending on your health profile, a doctor may adjust your Metformin dose, or introduce medications like SGLT2 inhibitors, GLP-1 receptor agonists, or insulin to safely lower your levels. Please consult your physician immediately for a personalized prescription. Meanwhile, stay hydrated and limit carbohydrate intake.