Can a blood pressure pill blunt a traumatic memory?
NCT ID NCT01713556
First seen Sep 25, 2026 · Last updated Sep 25, 2026
Summary
Researchers are testing whether propranolol, a drug that blocks adrenaline, can reduce PTSD symptoms when it is taken while a person recalls a traumatic event. The idea is that blocking the body's stress response during recall may weaken the memory's emotional hold. The trial enrolls adults with chronic PTSD and compares propranolol with a placebo during script-driven memory reactivation, then tracks symptom scores.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- propranolol, a blood pressure drug that blocks the body's adrenaline response
- What this could lead to
- If it works, propranolol taken during memory recall could become a short, low-cost way to soften the grip of a traumatic memory and ease PTSD symptoms.
- What could go wrong
- This is a mid-stage trial in a small group, and blocking adrenaline during recall may not weaken the memory enough to change symptoms. Propranolol can lower blood pressure and cause fatigue or dizziness, so it is not safe for everyone.
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Study facts
What this study's own registry entry says, in plain language.
- Phase
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Phase 2
Tests whether the treatment actually works, and watches for side effects, in a larger group.
- Participants
-
87 people
The number who actually took part.
- Started
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Nov 2012
- Finished
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Jun 2017
- Lead sponsor
-
Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
-
18 to 65 years
- Sex
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Anyone
- Healthy volunteers
-
Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Diagnosis of chronic PTSD * PTSD CheckList total score \>44 Exclusion Criteria: * Systolic blood pressure \< 100 mmHg * Contraindication to Propranolol * Previous adverse reaction to a β-blocker * Use of another β-blocker * Use of medication that could involve potentially dangerous interactions with propranolol * Psychotherapy or treatment with any pharmacologic PTSD medication within the 2 weeks prior to inclusion (6 weeks for fluoxetine) * Female with reproductive potential without reliable means of contraception * Pregnancy or lactation * Alcohol or drug abuse
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
-
CHU Toulouse
Toulouse, 31000, France
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Centre Hospitalier Charles Perrens
Bordeaux, 33076, France
-
Chru Lille
Lille, 59037, France
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Chu Montpellier
Montpellier, 34295, France
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