Antidepressant Use Not Linked to Worse Early TBI Outcomes, Study Finds

A new study published on January 28, 2026, in Neurology®, the medical journal of the American Academy of Neurology, indicates that individuals taking certain antidepressants at the time of a traumatic brain injury (TBI) do not face an increased risk of death, emergency brain surgery, or longer hospital stays. This research focused on serotonergic antidepressants, which include selective serotonin reuptake inhibitors (SSRIs), serotonin and norepinephrine reuptake inhibitors (SNRIs), and tricyclic antidepressants (TCAs).

Study Focus and Background

Serotonergic antidepressants function by increasing serotonin activity in the brain, and are commonly used to treat conditions such as anxiety and depression. Prior to this study, concerns had been raised regarding the potential for these medications to increase the risk of brain bleeding or complicate the early recovery phase following a TBI.

Jussi P. Posti, MD, PhD, a study author from the University of Turku, Finland, stated that their findings did not support previous concerns about these antidepressants potentially increasing the risk of brain bleeding or complicating early TBI recovery.

Methodology and Participants

The study involved 54,876 individuals in Finland, aged 16 or older, who had been hospitalized with a TBI. At the time of their injury, 14% of these participants were using serotonergic antidepressants. Researchers analyzed national prescription records to ascertain pre-injury antidepressant use and reviewed medical records to determine key outcomes. The outcomes measured included mortality rates within one month, the incidence of emergency brain surgery, and the duration of hospital stays.

Key Findings

The study presented several key findings:

Mortality

Within one month, a total of 4,105 participants died. This represented 7.6% of those using antidepressants and 7.5% of those not using them. After adjusting for confounding factors such as age, sex, and other health conditions, researchers found no increased likelihood of death within a month for individuals taking antidepressants prior to injury compared to non-users.

Emergency Brain Surgery

Antidepressant users were observed to be slightly less likely to require emergency brain surgery to relieve pressure or bleeding in the brain. Specifically, 6.8% of antidepressant users and 8.6% of non-users needed this procedure. After adjustments, antidepressant users had an 11% lower risk of requiring the surgery.

Hospital Stay

The duration of hospital stay was found to be equivalent for both groups, indicating no significant difference in the length of hospitalization.

Implications and Future Research

The findings suggest that antidepressant use does not appear to worsen early recovery after traumatic brain injury.

Dr. Posti indicated that future studies should investigate long-term recovery and outcomes across different healthcare settings to further expand upon these results.

Limitations and Funding

A limitation of the study is that it was conducted exclusively at hospitals and healthcare centers in Finland, which means the results might not be generalizable to other geographical areas or healthcare systems.

The study received financial support from multiple entities, including the Finnish government, the Paulo Foundation, Paavo Nurmi Foundation, Research Council of Finland, Sigrid Jusélius Foundation, and Finnish Foundation for Cardiovascular Research.