Evaluating fluoxetine for treating PTSD

A Phase 2, Multi-center, Multi-arm, Randomized, Placebo-controlled, Double-blind, Adaptive Platform Study to Evaluate the Safety, Tolerability, and Efficacy of Potential Pharmacotherapeutic Interventions in Active-Duty Service Members and Veterans With PTSD

PHASE2 · Global Coalition for Adaptive Research · NCT05948553

This study is testing if fluoxetine can help people with PTSD feel better compared to a placebo over 12 weeks.

Quick facts

PhasePHASE2
Study typeInterventional
Enrollment200 (estimated)
Ages18 Years to 65 Years
SexAll
SponsorGlobal Coalition for Adaptive Research (other)
Locations10 sites (Phoenix, Arizona and 9 other locations)
Trial IDNCT05948553 on ClinicalTrials.gov

What this trial studies

This Phase 2 randomized, double-blinded, placebo-controlled trial assesses the safety and efficacy of fluoxetine in individuals diagnosed with Post Traumatic Stress Disorder (PTSD). Participants will undergo a 30-day screening period followed by a 12-week treatment phase where they will be randomly assigned to receive either fluoxetine or a placebo. The study utilizes an adaptive platform design, allowing for the comparison of multiple interventions against a common control group. The trial aims to gather data on fluoxetine's effectiveness in alleviating PTSD symptoms.

Who should consider this trial

Good fit: Ideal candidates for this study are individuals diagnosed with PTSD who have not recently been treated with fluoxetine.

Not a fit: Patients who have a recent history of fluoxetine treatment for PTSD may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could provide a new effective treatment option for patients suffering from PTSD.

How similar studies have performed: Other studies utilizing adaptive platform trial designs have shown promise in evaluating multiple interventions, suggesting potential for success in this approach.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

No additional inclusion criteria beyond the inclusion criteria specified in the Master Protocol (NCT05422612).

Exclusion Criteria:

The following exclusion criteria are in addition to the exclusion criteria specified in the Master Protocol (NCT05422612).

1\. Recent history of treatment for PTSD with fluoxetine at doses of 20 mg daily, for at least 4 weeks. A remote history of treatment with fluoxetine for non-PTSD symptoms will be discussed on a case-by-case basis with the contract research organization (CRO) Medical Monitor.

Where this trial is running

Phoenix, Arizona and 9 other locations

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: Post Traumatic Stress Disorder

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.