Hi, Welcome to HCM. You are having Diabetes type II,management of diabetes includes diet control, increasing physical activity(Walking)regularly. Why you are feeling uneasiness with this medicine? is there any reaction to drug you must determine usually these medicines are tolerated well. Drug is combination of Metformin and Sitagliptin. Insulin is a hormone produced by the pancreas. It limits blood glucose levels by reducing the amount of glucose released by the liver into the blood and by increasing the removal of glucose from blood by muscle and fat tissues. Type 2 diabetes results when there is reduced sensitivity of muscle and fat to the effects of insulin. When the diabetes progresses, the pancreas produces less insulin. Both defects result in increased levels of glucose in the blood. Metformin is an oral medication that lowers blood glucose by increasing the sensitivity of liver, muscle, fat, and other tissues to the effects of insulin. Increasing the sensitivity of tissues to insulin causes more glucose to be removed from blood and thereby reduces the level of glucose. Sitagliptin is an oral drug that reduces blood glucose levels in patients with type 2 diabetes. Following a meal, incretin hormones such as glucagon-like peptide-1 (GLP-1) and glucose-dependent insulinotropic polypeptide (GIP) are released from the intestine, and their levels increase in the blood. GLP-1 and GIP reduce blood glucose by increasing the production and release of insulin from the pancreas. Some times can cause nausea,vomiting,and hypoglycemia (Low blood sugar). Take care. Good Luck.