A Study to Evaluate the Effectiveness of DT-101 as an Adjunctive Treatment in Patients With Depression

Inclusion Criteria: * The participant is able to read, understand and communicate in the local language used at the study site, and is willing to provide written informed consent * Male or female (assigned at birth, inclusive of all gender identities) participant must be 18 to 75 years of age, inclusive at the time of signing the informed consent. * Has recurrent depression (defined as at least one prior episode excluding the current one), as diagnosed by DSM 5-TR (Diagnostic and Statistical Manual of Mental Disorders, 2022). Exclusion Criteria: * Pregnant or breastfeeding or plans to become pregnant during the study. * Unstable medical condition or unstable chronic disease. * Significant neurological abnormality. * History of moderate or severe alcohol or drug use disorder as per DSM-5-TR in the 6 months prior to Screening. * History of seizure. * In the investigator's opinion, the participant is not capable of adhering to the protocol requirements.