Metformin Hydrochloride Sustained-release Tablets (Ⅲ) in Patients With Type 2 Diabetes Mellitus Complicated With Coronary Heart Disease

This trial is studying an extended-release form of metformin — a common diabetes medication — to see how well it works and how safe it is in patients with type 2 diabetes. Extended-release means the drug is released slowly over time, which may reduce side effects compared to regular metformin. **You may be eligible if...** - You have been diagnosed with type 2 diabetes - Your blood sugar is not well-controlled with diet alone or current medications - You are an adult (typically 18 or older) - You have adequate kidney function **You may NOT be eligible if...** - You have significant kidney disease (metformin can be dangerous with poor kidney function) - You have type 1 diabetes - You have severe liver disease - You have a history of lactic acidosis (a rare but serious condition) - You are pregnant or breastfeeding - You drink alcohol heavily Talk to your doctor to see if this trial is right for you.