Repeated Intranasal Esketamine Plus Almond Therapy in Patients With Treatment Resistant Depression

To examine the efficacy of Almond Therapy compared to Treatment as Usual when used in addition to an approved version of intranasal esketamine.

The duration of the study is 28 days. Participants enrolled in the Almond Therapy arm will have up 10 in person clinic visits, including the screening visit, participants will receive esketamine on 8 of these visits. There are also 8 remote therapy sessions conducted via telephone or video, and participants will also receive supportive text messages. Participants will have 5 telephone calls from an independent assessor to ask questions about their mental health (MADRS). Participants enrolled in the Treatment as usual will have 10 in-person clinic visits, including the Screening visit, participants will receive intranasal esketamine on 8 of these visits. Participants will continue to receive the therapy that their treating physician felt was appropriate at the time of enrolment in the study. In addition, participants will have 5 telephone calls from an independent assessor to ask questions on their mental health ( MADRS). Participants will receive intranasal esketamine twice-weekly according to the Product Monograph. To ensure that both groups receive approximately equal amounts of esketamine, patients will receive 56mg initially for a maximum of 2 weeks followed by 56mg or 84mg. As per the Product Monograph these will be given for 4 weeks for a total of 8 doses during the 28-day study.