What question did this study set out to answer?

This study aims to explore the clinical features and diagnostic challenges of immediate-type hypersensitivity reactions to proton pump inhibitors.

Immediate-Type PPI Hypersensitivity as a Severe Adverse Drug Reaction: Diagnostic Challenges, Cross-Reactivity, and Real-Life Outcomes

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This ambispective study describes hypersensitivity reactions to proton pump inhibitors, highlighting diagnostic hurdles and real-life implications.

This study aims to explore the clinical features and diagnostic challenges of immediate-type hypersensitivity reactions to proton pump inhibitors.
Conducted a single-center ambispective analysis of 40 patients evaluated for immediate-type hypersensitivity reactions to PPIs.
Retrospectively recorded index reactions, implicated PPIs, and results from skin tests or drug provocation testing.
Followed patients who tolerated an alternative PPI through structured telephone interviews.
Lansoprazole was identified as the most common culprit in 50% of cases.
65% of patients experienced anaphylaxis, and skin tests were positive for 25% of participants.
Cross-reactivity was observed in 25% of patients, primarily between lansoprazole and pantoprazole.
40.7% of patients restarted PPIs post-testing without recurrence, while behavioral barriers prevented others from resuming therapy.

Kural et al. (2026) studied this question.

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This ambispective study describes hypersensitivity reactions to proton pump inhibitors, highlighting diagnostic hurdles and real-life implications.