Hello @chistiania, There are some discussions that you might find helpful learning more about the risks related to ketamine that might be helpful. You might want to read through the posts and see if a member has similar symptoms and reply to their posts with any questions you might have.

-- Has anyone tried Ketamine for depression?
https://connect.mayoclinic.org/discussion/has-anyone-tried-ketamine-for-depression/
-- Ketamine for chronic pain:
https://connect.mayoclinic.org/discussion/ketamine-for-chronic-pain/
-- Questions to ask about ketamine infusions:
https://connect.mayoclinic.org/discussion/questions-to-ask-about-ketamine-infusions/
There are also a couple of discussions on chronic fatigue syndrome that might be helpful:
-- Help with Chronic Fatigue Syndrome:
https://connect.mayoclinic.org/discussion/help-with-chronic-fatigue-syndrome/
-- Myalgic Encephalomyelitis/Chronic Fatigue Syndrome (ME/CFS) treatments:
https://connect.mayoclinic.org/discussion/myalgic-encephalomyelitis-chronic-fatigue-syndrome-me-cfs-treatments/
The following articles might shed some light on the risks and effectiveness related to ketamine and hopefully answer questions you might have.
-- Anesthetic for Depression? Mayo Clinic Study Finds Low-Dose Ketamine Effective
https://newsnetwork.mayoclinic.org/discussion/anesthetic-for-depression-mayo-clinic-study-finds-low-dose-ketamine-effective/
-- Mayo Clinic Minute: How esketamine can help severe depression
https://newsnetwork.mayoclinic.org/discussion/mayo-clinic-minute-how-esketamine-can-help-severe-depression/
Hoping you find some answers.