Background: Paracetamol is a widely used analgesic to which hypersensitivity reactions are rare. Reactions to paracetamol may be due to the pharmacological effects of cyclooxygenase-1 inhibition or, more rarely, due to a selective allergy against paracetamol.
Objective: This article aims to review the current literature in the context of two cases seen in the authors' allergy practice.
Discussion: Paracetamol allergy is uncommon and, as a result, may be overlooked as a cause for immediate hypersensitivity, which can lead to a significant delay in diagnosis. Currently, specialist referral for a supervised oral challenge is required for formal diagnosis.
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