Research Summary

Preinjury Antidepressant Use Not Linked to Worse Short-Term Outcomes After Traumatic Brain Injury

Edited by:
Ashton L. Stahl

Key Highlights

  • A retrospective, nationwide study of 54,876 adults hospitalized with traumatic brain injury (TBI) in Finland assessed associations between preinjury antidepressant use and early clinical outcomes.
  • Preinjury serotonergic antidepressant use was not associated with increased 30-day mortality or longer hospital stays.
  • Antidepressant users had a slightly lower adjusted risk of emergency brain surgery than non-users.
  • Findings provide reassurance regarding short-term TBI outcomes for patients on antidepressants at injury time, although generalizability beyond Finland requires further study.

Taking serotonergic antidepressants at the time of traumatic brain injury (TBI) does not appear to increase the risk of serious early complications, according to a Finnish population-based study published on January 28, 2026, in Neurology. This finding directly addresses prior concerns about bleeding risk and adverse early outcomes associated with antidepressant use in TBI patients.

Researchers leveraged national health data to compare outcomes between patients who were taking antidepressants at the time of injury and those who were not, focusing on key clinical endpoints, such as mortality, emergency brain surgery, and length of hospital stay.

The retrospective cohort study included 54,876 individuals aged 16 years and older who were admitted with TBI across Finland. Prescription records identified preinjury use of serotonergic antidepressants, including selective serotonin reuptake inhibitors, serotonin and norepinephrine reuptake inhibitors, and tricyclic antidepressants. Investigators assessed 30-day mortality, the need for emergency neurosurgical operations to relieve pressure or bleeding, and hospital length of stay, adjusting for demographic and clinical covariates, including age, sex, and comorbidities.

Study Findings
Among the cohort, 14% were using serotonergic antidepressants at injury. Within 30 days, 4,105 deaths occurred; 7.6% were among antidepressant users compared with 7.5% among non-users. After adjustment, preinjury antidepressant use was not associated with increased short-term mortality. Emergency brain surgery was required in 6.8% of antidepressant users versus 8.6% of non-users, yielding an 11% lower adjusted risk among those on antidepressants. There was no difference in the length of hospital stay between groups.

Clinical Implications
According to the study authors, these findings suggest that concerns about serotonergic antidepressants contributing to worse short-term outcomes after TBI are unsupported in this large Finnish cohort. The results may reassure clinicians and patients that continuing antidepressant therapy in the acute TBI setting does not appear to affect early recovery metrics adversely. However, the authors note that generalizability to other health care systems and long-term outcomes warrants further research.

Expert Commentary
“These findings provide reassurance for people who take antidepressants that antidepressant use does not appear to worsen early recovery after traumatic brain injury,” and “Future studies should examine whether these results hold true for long-term recovery and across different health care settings,” the researchers concluded.

Reference
1. Posti JP, Tornio A, Ruuskanen JO, Kytö V. Impact of antidepressant use and serotonergic profile on short-term outcome of traumatic brain injury: a retrospective nationwide cohort study. Neurology. 2026;106(4):e214602. doi:10.1212/WNL.0000000000214602

2. American Academy of Neurology. Antidepressants not associated with serious complications from traumatic brain injury. Newswise. January 28, 2026. Accessed February 10, 2026. https://www.newswise.com/articles/antidepressants-not-associated-with-serious-complications-from-tbi/?sc=dwhr&xy=10026517