Dear sir i can understand your concern. i would like to explain you benefits of different drugs used in diabetes the medication what you are following is the best combination. Among all the medications i vote glycomet also called as metformin the best. the beauty of this medication is its the only medication available in market which lowers insulin resistance in your body and helps insulin produced in your body to act in a better way to lower your blood sugar. there are other medications which help in lowering insulin resistance like pioglitazone are associated with side effects so they are slowly losing their popularity(side effect like weight gain and heart failure). among all the medications including insulin metformin is the only medication associated with the benefit of weight loss and weight maintenance. the latest research is showing that it also protects against cancers. it helps in reducing the liver fat(fatty liver) also. considering above benefits i suggest my patients in clinic to continue use of metformin. there are very few patients whom we will use metformin in a very low dose they are kidney failure patients so i suggest yo to continue metformin regards Dr vamsi Diabetologist Apollo hospitals