This study is looking at an investigational medication for people with Major Depressive Disorder (MDD). The goal is to see how well the medication works compared to a placebo (a pill with no active medicine) and to check its safety. Participants will be split into groups receiving different doses. The study lasts for 6 weeks, and you'll need to visit the study site for evaluations. To join, you must be at least 18 years old and have MDD diagnosed by a doctor. Your current depressive episode should last between 4 weeks to 1 year. You cannot join if you have other mental health conditions like schizophrenia, bipolar disorder, or if you have tried multiple antidepressants without success.

• Study Duration: 6 weeks
• Visits Required: Multiple site visits
• Eligibility: 18 years or older, diagnosed with MDD