Ketamine is a medication primarily used as an anesthetic in medical settings. It works by blocking certain receptors in the brain, leading to a dissociative state, which means it can create feelings of detachment from the environment and oneself. Originally developed in the 1960s, it is often used in surgeries and emergency medicine due to its rapid onset and safety profile. In recent years, ketamine has gained attention for its potential in treating mental health conditions, particularly depression and post-traumatic stress disorder (PTSD). Research suggests that it may provide rapid relief from symptoms, even in patients who have not responded to traditional treatments. However, its use for these purposes is still being studied, and it is typically administered in controlled settings.