Suicide remains one of the most serious public health problems in the world. Every year, millions of people struggle with suicidal thoughts, and many families are deeply affected by the loss of loved ones.
According to health experts, suicide is one of the leading causes of death among young people, especially those between the ages of 10 and 34.
Doctors and researchers have spent decades trying to understand why some people become trapped in suicidal crises. Mental illnesses such as depression, bipolar disorder, anxiety, trauma, and substance abuse can all increase risk. However, scientists now believe that biological changes inside the brain may also play an important role.
A new study from Texas A&M University and Baylor College of Medicine suggests that lithium, a medication used for decades to treat bipolar disorder, may help reduce impulsive thinking linked to suicide risk. The findings were published in the journal Experimental and Clinical Psychopharmacology.
Lithium has long been known as an effective treatment for mood disorders. Doctors have prescribed it for many years to stabilize mood swings in people with bipolar disorder. Earlier research also showed that people taking lithium appeared less likely to die by suicide, but scientists did not fully understand why.
The new study explored whether lithium changes the way the brain processes decisions and controls impulsive behavior.
Researchers focused on people who had survived medically severe suicide attempts. These were individuals who had experienced life-threatening suicidal crises serious enough to require major medical care.
The scientists used a test called electroencephalography, or EEG, to study brain activity. EEG is a simple and noninvasive method that measures electrical signals in the brain using small sensors placed on the scalp. Doctors often use EEG to study brain function because it is safe, painless, and relatively easy to perform.
The research team recruited patients from the Ben Taub Emergency Center and the Michael E. DeBakey Department of Veterans Affairs Medical Center. These participants were considered at high risk for future suicide attempts. Researchers also included comparison participants with similar psychiatric backgrounds but without a history of severe suicide attempts.
The study used a double-blind, randomized, placebo-controlled crossover design. This means some participants received lithium while others received placebo pills with no active medication, and neither the participants nor researchers knew which treatment was being given at the time. This type of study design helps reduce bias and increases the reliability of the findings.
Before treatment, researchers found that participants with a history of severe suicide attempts showed higher impulsivity and signs of increased emotional arousal. Their EEG brain activity also looked different from the comparison group.
After lithium treatment, important changes appeared. The participants showed improvements in decision-making and impulse control. Their brain signals also changed in ways linked to better self-control and slower decision-making.
According to Dr. Nicholas Murphy, one of the study’s lead researchers, lithium seemed to give people more time to think before acting impulsively. This finding is important because impulsive behavior is considered one of the major factors involved in suicidal crises.
Researchers believe that in moments of intense emotional distress, some suicidal actions may happen very quickly, without much time for reflection. If treatments like lithium can slow impulsive decision-making, they may help reduce the likelihood of dangerous actions during moments of crisis.
The study is believed to be the first human research showing lithium-related EEG brain signal changes in people with recent suicidal behavior.
The findings also support the growing idea that suicide risk may involve measurable biological processes in the brain rather than being purely psychological or emotional. Scientists hope this could eventually reduce stigma surrounding mental health conditions.
Dr. Ynhi Thomas, another researcher involved in the study, explained that identifying measurable biological markers for suicide risk may help doctors develop better ways to identify vulnerable patients earlier.
Researchers say emergency departments may play a very important role in suicide prevention because many patients experiencing suicidal crises first arrive in emergency rooms rather than psychiatric clinics.
Dr. Alan Swann, senior author of the study, emphasized that many people who attempt suicide may never have seen a psychiatrist before their crisis. This means doctors and nurses in emergency medicine may have valuable opportunities to identify high-risk individuals and begin treatment early.
The researchers also noted that access to mental health care remains difficult for many people. Financial problems, social stress, lack of insurance, and stigma often prevent people from receiving psychiatric support. For some patients, the emergency room may be their only point of contact with the healthcare system during a mental health emergency.
Although the findings are promising, the researchers caution that lithium is not a simple cure for suicide risk. Suicide is a highly complex issue influenced by mental health, life stress, trauma, social factors, and biology.
Lithium itself can also have side effects and must be carefully monitored by doctors. Patients taking lithium often need regular blood tests because high lithium levels can affect the kidneys, thyroid, or nervous system.
Even so, the study opens an important new direction for future research. Scientists hope EEG brain scans may eventually help doctors identify people at greatest risk and measure whether treatments are improving impulse control.
The researchers believe this work is only an early step toward developing better emergency care and suicide prevention strategies. Future studies may help create tools that can guide treatment decisions and support patients more effectively after they leave the hospital.
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The study was published in Experimental and Clinical Psychopharmacology.
Source: Texas A&M University.
