New pill could let EPP patients enjoy the sun without pain
NCT ID NCT03520036
First seen Jun 24, 2026 · Last updated Jun 27, 2026 · Updated 1 time
Summary
This phase 2 trial tested a drug called MT-7117 in 102 adults with erythropoietic protoporphyria (EPP), a rare condition that causes severe pain from sunlight. Participants took either a low dose, high dose, or placebo daily for 16 weeks. The goal was to see if the drug could increase the time they could stay in the sun without symptoms.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
- Active substance
- MT-7117
- What this could lead to
- If it works, this could lead to a daily pill that lets people with EPP spend more time in sunlight without pain.
- What could go wrong
- This is a small, early-phase trial. The drug may not work better than placebo, and side effects are still being studied.
This is an AI summary of the original study and may miss details. Read our disclaimer.
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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
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ACTCA, A Member of the Alliance, Inc.
Los Angeles, California, 90036, United States
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Ichan School of Medicine at Mount Sinai
New York, New York, 10029, United States
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Metro Boston Clinical Partners, LLC
Brighton, Massachusetts, 02135, United States
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Remington-Davis, Inc
Columbus, Ohio, 43215, United States
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University of California at San Francisco
San Francisco, California, 94143, United States
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University of Miami Miller School of Medicine
Miami, Florida, 33136, United States
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University of Texas Medical Branch Porphyria Center
Galveston, Texas, 77555, United States
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University of Utah
Salt Lake City, Utah, 84108, United States
-
Wake Forest Baptist Medical Center
Winston-Salem, North Carolina, 27157, United States
More trials for these conditions
Other studies related to the condition(s) this trial covers.
- Can a daily pill douse the Sun's pain for people with EPP?
- New hope for rare sun allergy: bitopertin offered to patients with no options
- New study aims to unlock mysteries of rare sun allergy disorders
- New drug aims to let sunlight-sensitive patients enjoy the sun longer
- New pill could let Sun-Sensitive patients enjoy the outdoors