PEN-FAST Penicillin Allergy Risk Score PEN - Penicillin allergy reported by patient F - Five years or less since reaction - 2 points A - Anaphylaxis or angioedema OR S - Severe cutaneous adverse reaction - 2 points T - Treatment required for reaction - 1 points Interpretation: 0 Very low risk of positive penicillin allergy test <1% (<1 in 100 patients reporting penicillin allergy) 1-2 Low risk of positive penicillin allergy test 5% (1 in 20 patients) 3 Moderate risk of positive penicillin allergy test 20% (1 in 5 patients) 4-5 High risk of positive penicillin allergy test 50% (1 in 2 patients) (PMID: 32176248) #PENFAST #Penicillin #Allergy #Risk #Score #PCN #diagnosis
