I have been a diabetic for 10 years. Despite taking Metformin 500 mg (twice daily), Voglibose (once daily), and Tenepure (once daily), my current blood sugar levels are 140 mg/dL (fasting) and 180 mg/dL (post-meal). Do I need to adjust my medication dosage or change my medicines to control my blood sugar levels better?

Your blood sugar levels (fasting 140 mg/dL, post-meal 180 mg/dL) are slightly elevated but not alarming. Since you have managed diabetes for 10 years, it is entirely natural for your body's medication needs to evolve over time. Your current regimen of metformin, voglibose, and teneligliptin is a strong combination, but there is room to optimize the dosages?particularly metformin, which is currently at a lower daily dose. Please do not worry. I recommend consulting your doctor to review these readings. They will likely suggest an HbA1c test to see your three-month average and safely adjust your treatment plan to bring your numbers back to target.