Common antibiotic could shield hearts after attack
NCT ID NCT03508232
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study tested whether a short course of doxycycline, a common antibiotic, can prevent heart damage after a heart attack. 174 adults who had a severe heart attack received either doxycycline or a placebo twice daily for one week. Researchers then used MRI scans to check heart structure three months later, hoping to see less scarring and better heart function.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
Active substance
Doxycycline
What this could lead to
If it works, this could point toward a simple, short-term treatment to protect the heart after a heart attack and reduce the risk of future heart failure.
What could go wrong
This is a small pilot study, so results may not be conclusive. Doxycycline is not yet proven for this use, and the benefit may be small or absent.
Disclaimer
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the original study
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Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
This is a summary of the original study . Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
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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
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Locations
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Royal Alexandra Hospital
Edmonton, Alberta, T5H 3V9, Canada