This study is testing a new drug called CT-388 to see how well it works and how safe it is for people who are overweight or obese and have Type 2 Diabetes Mellitus (T2DM). T2DM is a condition where the body doesn't use insulin properly, leading to high blood sugar. Participants will be randomly assigned to receive either CT-388 or a placebo (a fake treatment) without knowing which one they get. The study will compare different doses of CT-388.

To join, you must be 18-75 years old with a body mass index (BMI) of 25 or more, which means you are overweight. You must have T2DM and have tried to lose weight through diet and exercise before. People with Type 1 Diabetes or other serious health issues cannot participate.

• The study involves multiple visits over a period of time.
• Participants will not know if they receive CT-388 or placebo.
• Potential risks and side effects might occur with new treatments.