
Depression is a serious mental health condition that affects how people feel, think, and act. For some people, it can become so severe that they experience strong thoughts of suicide.
These moments are often urgent and dangerous, and they require treatments that can work quickly. However, many traditional antidepressant medications take weeks before they start to help, which can be too slow for someone in immediate crisis.
A new study from Columbia University offers hope by showing that a drug called ketamine may work much faster. The research, led by Dr. John Mann and published in the Journal of Clinical Psychiatry, suggests that ketamine can quickly reduce suicidal thoughts and also improve thinking and decision-making.
Ketamine is not a new drug. It has been used for many years as an anesthetic in medical settings. In recent years, doctors and researchers have begun to explore its effects on the brain, especially for people with severe depression that does not respond to standard treatments.
The study included 78 adults who had been diagnosed with major depressive disorder and were experiencing strong suicidal thoughts. This group represents people who are at high risk and need urgent help.
Each participant received a standard dose of ketamine through an intravenous infusion, also known as an IV. This means the drug was delivered directly into the bloodstream for fast action.
Researchers carefully observed the participants over the next 24 hours. The results showed clear and rapid improvements. Many people reported that their suicidal thoughts became much less intense shortly after receiving ketamine. This fast effect is very different from traditional antidepressants, which can take several weeks to show results.
But the study found something else that is equally important. Ketamine also helped participants think more clearly. People showed better reasoning skills and were able to make decisions more effectively.
These cognitive improvements may play a key role in reducing suicidal behavior. When people are thinking more clearly, they may be better able to cope with distress and avoid harmful actions.
Interestingly, the researchers found that the improvement in thinking ability was strongly linked to the reduction in suicidal thoughts.
In some cases, people’s thinking improved even when their overall depression symptoms had not changed as much. This suggests that ketamine may help by targeting the way people process information and make decisions during a crisis.
To better understand the drug’s effects, the study also included a comparison group. These participants received a different drug called midazolam, which is a sedative often used to treat anxiety. By comparing the two groups, the researchers could see whether ketamine had unique benefits.
The results showed that ketamine was more effective than midazolam in improving both mood and cognitive function. People who received ketamine performed better on tests that measured reasoning and decision-making. These abilities are often impaired in people who are struggling with severe depression and suicidal thoughts.
Suicide remains a major public health concern around the world. In the United States, it is one of the leading causes of death, especially among younger people.
Studies show that most people who die by suicide have an underlying mental health condition, such as depression. Many also experience a severe depressive episode shortly before their suicide attempt.
These facts highlight the need for treatments that can act quickly and effectively. Ketamine may be especially useful in emergency situations, where there is little time to wait for traditional medications to work.
Although ketamine is not officially approved by the U.S. Food and Drug Administration for treating suicidal thoughts, it is already being used in some clinics as an off-label treatment. Doctors use it carefully, often in controlled medical settings, to help patients who are in crisis.
The findings from this study provide important clues about how ketamine works in the brain. It may help correct negative thinking patterns and improve the ability to make decisions, which are both important for recovery.
While more research is needed to fully understand its long-term effects and safety, ketamine shows strong potential as a fast-acting treatment. For people facing the most difficult moments of depression, having a treatment that works within hours instead of weeks could make a life-saving difference.
This research gives new hope to patients, families, and healthcare providers. It suggests that faster and more effective care for suicidal thoughts may be possible, helping people find stability and begin their path toward recovery.
If you care about health, please read studies that scientists find a core feature of depression and this metal in the brain strongly linked to depression.
For more health information, please see recent studies about drug for mental health that may harm the brain, and results showing this therapy more effective than ketamine in treating severe depression.
Copyright © 2026 Knowridge Science Report. All rights reserved.


