Paracetamol (acetaminophen) hypersensitivity
Abstract
BACKGROUND: Paracetamol (acetaminophen) intolerance can occur in less than 5% of aspirin-sensitive subjects as a result of inhibition of prostaglandin synthesis but hypersensitivity to paracetamol without aspirin sensitivity is rare.
METHODS: We report a case of an acute life-threatening hypersensitivity reaction to paracetamol.
RESULTS: An oral challenge with 125 mg of paracetamol was carried out and followed by generalized anaphylactic reaction. An oral provocation test with 500 mg aspirin was well tolerated in the patient.
CONCLUSION: An acute hypersensitivity reaction to paracetamol is described in this study. The results of the study suggest a real allergic mechanism rather than inhibition of prostaglandin synthesis as responsible.
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Evidence Hub reads this as a case report, done in people. Its evidence level is 5 of 5 (Very low · case / narrative / animal / in vitro / in silico). Case reports, narrative reviews, and animal, cell or computer-model studies give the weakest evidence for human health.
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