Pain relief drug trial for mast cell syndrome stalls early
NCT ID NCT05652907
First seen Jun 26, 2026 · Last updated Jun 27, 2026 · Updated 1 time
Summary
This Phase 2 trial tested whether FSD201 tablets could reduce chronic pain in adults with mast cell activation syndrome. The study planned to enroll many participants but was terminated early with only 2 people. No results are available to show if the drug works or is safe.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
Active substance
FSD201 (tablets)
What this could lead to
If it worked, this could point toward a treatment for chronic pain in people with mast cell activation syndrome.
What could go wrong
The trial was terminated early with only 2 participants, so no reliable conclusions can be drawn. It is unclear if FSD201 is safe or effective.
Disclaimer
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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.
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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Norman Marcus Pain Institute
New York, New York, 10016, United States
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Saint Charles Clinical Research
Weldon Spring, Missouri, 63304, United States
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Toronto Rehabilitation Institute
Toronto, Ontario, Canada