Ketamine infusion in psychiatry refers to the therapeutic use of ketamine, a dissociative anesthetic, as a novel treatment for various mental health conditions. Administered via intravenous infusion, ketamine has shown potential in rapidly alleviating symptoms of depression, anxiety, OCD, trauma such as PTSD, particularly in cases that have been resistant to traditional treatments. The mechanism of action is thought to involve influencing brain pathways related to mood regulation. Ketamine infusion is typically conducted in a controlled medical setting, and its effects may offer rapid relief, but the duration of benefit varies among individuals.