Allergy to dye used in scans: does it stick around?
NCT ID NCT07409051
First seen Jun 24, 2026 · Last updated Jun 27, 2026 · Updated 1 time
Summary
This study follows 100 adults who had an allergic reaction to contrast media (dye used in CT scans and other imaging) to see if the allergy persists over time. Participants will undergo repeat skin testing to check for ongoing sensitivity. The goal is to understand how long the allergy lasts and what factors might make it more likely to continue.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- What this could lead to
- If successful, this could help doctors better predict who will remain allergic to contrast media, improving safety for future imaging scans.
- What could go wrong
- This is an observational study, not a treatment trial. It only measures allergy persistence and risk factors, so it won't directly change patient care.
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.
- Participants
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About 100 people
The number the study aims to enrol. It can still change while the study runs.
- Expected to start
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Feb 2026
An estimate. Start dates often move.
- 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.
Who is studied
Drug Allergy and Hypersensitivity Database of the Allergy Exploration Unit, Montpellier University Hospital (CHU Montpellier).
- Ages
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18 years and older
- 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: \- Adult patients (≥18 years) with confirmed IgE-mediated allergy to contrast media products after a first exposure. Exclusion Criteria: * Patients receiving H1 antihistamines for an allergic condition at the time of evaluation. * Patients with active eczema and/or uncontrolled asthma. * Pregnant or breastfeeding women, or women who have recently given birth. * Individuals under legal protection (e.g., guardianship). * Individuals deprived of liberty or involved in judicial proceedings. * Individuals without health insurance coverage. * Absence of clear, written informed consent.
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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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CHU Montpellier
Montpellier, France