A Study of Participants With Moderate or Severe Major Depressive Disorder (MDD) Requiring Urgent Symptom Control in a Psychiatric Emergency

Inclusion Criteria: For Participant and Carer * Capacity to provide consent * Must sign an informed consent form (ICF) allowing data collection and source data verification in accordance with local requirements * Sufficient command of English language to understand the study information and requirements For Participant * Participant must be deemed to have current suicidal ideation with intent at the point of study enrollment and be within four days of presenting with suicidal ideation with intent in relation to the current episode For Carer * Participant and/ or carer report that the carer has a personal relationship with the patient and provides unpaid support or care Exclusion Criteria: * Capacity to provide consent * Participant is known to be diagnosed with any of the following conditions: mania, bipolar disorder, psychotic disorder, depression with psychotic features, autism, dementia, intellectual disability * Participant is known to be diagnosed with any of the following conditions: mania, bipolar disorder, psychotic disorder, depression with psychotic features, autism, dementia, intellectual disability