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Anaphylactic reactions to proton-pump inhibitors
S Natsch1, M H Vinks, A K Voogt
1Department of Clinical Pharmacy, University Hospital Nijmegen, The Netherlands.
The Annals of Pharmacotherapy
|April 20, 2000
Summary
Proton-pump inhibitors (PPIs) can cause anaphylactic reactions, a rare but serious side effect. Healthcare providers should be aware of this potential risk when prescribing these commonly used medications.
Area of Science:
- Pharmacology
- Clinical Medicine
- Immunology
Background:
- Proton-pump inhibitors (PPIs) are widely prescribed for acid-related gastrointestinal disorders.
- Anaphylaxis is a severe, potentially life-threatening allergic reaction.
Observation:
- Two patients experienced severe anaphylactic reactions, including edema, pruritus, urticaria, and loss of consciousness, shortly after ingesting omeprazole and pantoprazole.
- These reactions occurred despite previous uneventful exposure to PPIs, suggesting potential for delayed hypersensitivity or cross-reactivity.
Findings:
- The reported cases, along with 42 other reports to the Uppsala Monitoring Centre, indicate that PPIs, as a class of benzimidazole derivatives, can induce anaphylactic shock.
- Anaphylactic reactions constitute a small percentage (0.2%) of all reported adverse drug reactions to PPIs.
Implications:
- Chemically related PPIs may exhibit cross-sensitivity, necessitating caution in patients with a history of PPI-induced anaphylaxis.
- Healthcare professionals must remain vigilant for potential anaphylactic reactions to PPIs, despite their low reported frequency, due to the severity of the condition.