A blood sugar level of 190 mg/dL indicates your diabetes is not fully controlled with Metsmall 500mg (Metformin) alone. Rather than self-prescribing alternative medicine, you must consult your doctor. They may consider safely increasing your Metformin dose, as 500mg is a low starting dose, or adding another class of medication. Additionally, focus on a low-carb diet, regular exercise, and track whether this 190 reading was fasting or post-meal. Please do not change or stop your medication without professional medical guidance.