Here are some relevant articles to help explain what Ketamine is, and what the benefits are. 

Paradigms of Ketamine Treatment 

Ketamine – 50 years in use: from anesthesia to rapid antidepressant effects and neurobiological mechanisms

Notes from the Frontier: Ketamine-Assisted Psychotherapy (KAP) in Clinical Practice

Ketamine-assisted psychotherapy provides lasting and effective results in the treatment of depression, anxiety and post traumatic stress disorder at 3 and 6 months: Findings from a large single-arm retrospective effectiveness trial

A Cohort-Based Case Report: The Impact of Ketamine-Assisted Therapy Embedded in a Community of Practice Framework for Healthcare Providers with PTSD and Depression

How Group Therapy May Impact the Future of Psychedelic Medicine 

The Past, Present and Future of Using Ketamine to Treat Depression

Self-Care for Helping Professionals: An Ethical Imperative