Ketamine nasal spray is used as a fast-acting treatment for depression, anxiety, PTSD, and certain chronic pain conditions. It works by modulating glutamate, a neurotransmitter involved in mood regulation. The nasal spray allows for rapid absorption into the bloodstream, offering relief within minutes for patients who haven’t responded well to traditional therapies. Ketamine is administered in controlled doses, typically under medical supervision, due to its potency and potential side effects. It has shown promise in reducing symptoms and improving mood quickly, making it a valuable option in mental health care.