Millions wrongly told they're allergic to penicillin? study tests a fix.
NCT ID NCT03581604
First seen Jun 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time
Summary
This study tested whether a standard allergy work-up can accurately identify people who were incorrectly labeled as allergic to penicillin. 155 adults with a suspected penicillin allergy went through testing, including a drug challenge to confirm if they were truly allergic. The goal was to safely 'de-label' those who are not actually allergic, which could improve antibiotic choices and help fight antibiotic resistance.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
Active substance
Allergy work-up (diagnostic test)
What this could lead to
If successful, this could help many people who were told they are allergic to penicillin find out they are not, allowing safer and more effective antibiotic treatment.
What could go wrong
This is a small, completed study with 155 participants, so results may not apply to everyone. The allergy work-up may not catch all true allergies, and some people could still have a reaction.
Disclaimer
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This is a summary of
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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Oslo University Hospital, Dpt of Pulmonary Diseases, Ullevål
Oslo, Postbox 4950 Nydalen, 0424, Norway