Could vitamin d speed recovery from bleeding strokes?
NCT ID NCT07458815
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This pilot study tests whether high-dose vitamin D can help the body clear blood clots in the brain after a hemorrhagic stroke. Forty adults with a recent brain bleed will receive either vitamin D or standard care. Researchers will measure how fast the blood clot shrinks and check for side effects like high calcium levels.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- Vitamin D
- What this could lead to
- If it works, this could point toward a simple, safe treatment to improve recovery after a bleeding stroke.
- What could go wrong
- This is a very early pilot study with only 40 people. It mainly checks safety, not whether vitamin D truly helps. Results may not apply to all stroke patients.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
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Not a phased trial
Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.
- Participants
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About 40 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Mar 2026
- Expected to finish
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Feb 2028
An estimate. End dates often move.
- Lead sponsor
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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
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18 to 90 years
- Sex
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Anyone
- Healthy volunteers
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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: * Spontaneous ICH diagnosis * Age ≥ 18 years * Within 96 hours of ICH * Premorbid Modified Rankin Scale of ≤2 * Supratentorial ICH * ICH volume ≥2 mL Exclusion Criteria: * Expected life expectancy of \<1 year * Glasgow Coma Scale \<9 * Anticipated surgical evacuation of hematoma * Inability to participate in follow-up activity * Hypercalcemia * Hyperphosphatemia * History of kidney stones * Bleeding tendency * Severe renal impairment * Severe liver impairment * Known contraindication or allergy to vitamin D
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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.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
1 site. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
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The University of Hong Kong
RECRUITINGHong Kong, Hong Kong
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Other studies related to the condition(s) this trial covers.
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- Can an ancient herbal pill improve outcomes after a bleeding stroke?