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. 2025 Mar 6;9:28–39. doi: 10.5414/ALX02531E

Table 2. No evidence of allergy to β-lactam antibiotics.

– Allergy documented but denied by patient
– Isolated gastrointestinal reaction: diarrhea, nausea, vomiting (to be distinguished from spontaneous occurrence in anaphylactic reactions together with other anaphylactic symptoms)
– Isolated non-specific reaction: dizziness, headache, fatigue, palpitation, rhinoconjunctivitis (often associated with fear of drug hypersensitivity)
– Delayed urticaria: occurrence > 1 day after discontinuation or persisting for days after discontinuation
– Mild exanthema: occurrence > 1 week after discontinuation
– Positive family history without personal allergy history
– Isolated generalized or localized pruritus without further skin changes and without warning signs of anaphylaxis (burning/tingling of tongue/palate, palm/sole of foot or genitals, feeling of heat, coughing, difficulty swallowing, reddening of large areas of skin)
– Anamnestic tolerance of the suspected β-lactam antibiotic administered (accidentally)
Procedure: Direct administration of β-lactam antibiotic without allergologic diagnostics. Direct delabeling (documentation in patient file/written information for further GP care/education of patient), collection of allergy passport/card if necessary.