Fluvoxamine to reduce delirium after non-cardiac surgery

Mitigating Delirium With Fluvoxamine Treatment for Non-Cardiac Surgery (MD FluNCS)

PHASE3 · Washington University School of Medicine · NCT06969287

This study will test whether giving fluvoxamine around the time of elective non-cardiac, non-intracranial surgery can help reduce postoperative delirium in older adults who will stay in the hospital at least two days.

Quick facts

PhasePHASE3
Study typeInterventional
Enrollment46 (estimated)
Ages60 Years and up
SexAll
SponsorWashington University School of Medicine (other)
Locations1 site (St Louis, Missouri)
Trial IDNCT06969287 on ClinicalTrials.gov

What this trial studies

Older adults undergoing elective non-cardiac, non-intracranial surgery are randomized to receive fluvoxamine or placebo in this Phase 3 effort. Investigators will measure systemic inflammatory markers as a proxy for neuroinflammation, high-density EEG, plasma biomarkers of neural injury, and delirium severity and incidence after surgery. The work is designed to establish biological plausibility and the collaborative infrastructure needed for a larger multisite trial while testing whether fluvoxamine affects inflammation and clinical delirium outcomes. Clinical outcomes are combined with mechanistic biomarker studies to improve understanding of delirium pathogenesis.

Who should consider this trial

Good fit: Ideal candidates are English-speaking older adults having elective non-cardiac, non-intracranial surgery with an expected hospital stay of at least two days who can give informed consent and have no contraindications to SSRIs.

Not a fit: Patients with prior SSRI or fluvoxamine intolerance, planned postoperative ventilation, active drug or alcohol dependence, inability to consent, or taking medications with serious interactions are excluded and unlikely to benefit from this intervention.

Why it matters

Potential benefit: If successful, this approach could lower the incidence or severity of postoperative delirium and reduce related cognitive and functional decline in older surgical patients.

How similar studies have performed: Fluvoxamine showed promise in some COVID-19 studies and there is biological rationale for an anti-inflammatory effect, but fluvoxamine has not been proven to prevent postoperative delirium and large trials are lacking.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* English-speaking
* elective non-cardiac or non-intracranial surgery requiring at least a 2-day hospital length of stay

Exclusion Criteria:

* Received investigational drug within the last 7 weeks
* lack of capacity to provide informed consent
* prior known intolerance or allergy to SSRIs or fluvoxamine
* planned postoperative ventilation
* drug or alcohol dependence
* preoperative use of non-NSAID medications with drug-drug interactions of Class X (Avoid Combination) or D (Consider Therapy Modification)
* risk of serotonin syndrome (St John's Wort, SSRIs, or TCA)

Where this trial is running

St Louis, Missouri

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.

View on ClinicalTrials.gov →

Conditions: Delirium, Surgery-Complications, delirium, geriatric, surgery, fluvoxamine

Last reviewed 2026-05-15 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.