Alternative Antipyretics for Paracetamol Allergy

Primary Recommendation: Ibuprofen

Ibuprofen is superior to paracetamol for fever reduction and provides longer duration of action, making it the optimal first choice for patients with paracetamol allergy 2

For patients with paracetamol allergy, ibuprofen is the first-line alternative for fever management, with other NSAIDs serving as additional options if ibuprofen is contraindicated or ineffective, as recommended by the Journal of Allergy and Clinical Immunology 1
Note: Cross-reactivity within the same chemical class can occur, though not universal, which is important to consider when selecting an alternative NSAID 1
These structurally distinct NSAIDs, such as meloxicam, nabumetone, and others, may be better tolerated if there's concern about cross-reactivity 1

Reduce ibuprofen dose in patients with impaired renal function, as recommended by the BMJ 2
Avoid ibuprofen in patients taking aspirin for antiplatelet effects, as ibuprofen antagonizes aspirin's irreversible platelet inhibition, according to Circulation 3

Physical cooling methods, such as tepid sponging, may be considered as adjunctive therapy, though evidence from randomized trials is limited, as reported by the BMJ and Stroke 2, 5
Ensure adequate hydration, no more than 2 liters per day in adults, as recommended by Praxis Medical Insights 4

Patients with mastocytosis may exhibit NSAID hypersensitivity through mast cell degranulation, and should be consulted, as recommended by the Journal of Allergy and Clinical Immunology 1
History of severe cutaneous reactions to NSAIDs, such as SJS/TEN, DRESS, requires avoidance of all NSAIDs in this class, according to the Journal of Allergy and Clinical Immunology 1