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In difficult cases, what is your approach to find a causative agent of fixed drug or fixed food eruption?
Drug elimination is often helpful, but some triggers are not easy to identify because they are found in food items.
Answer from: at Academic Institution
I don't think there is any answer other than advising the patient of the natural course/behavior of the eruption and having them keep a strict journal of all intake until the culprit is determined. Data on testing has been mixed at best (Jayasundera & Watts, PMID 38336399) -- though there may be...
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