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(C) Positive prick test with undiluted Desomedine on delayed reading at day 2 (same prick test as in B) gl Prick tests were performed with undiluted Desomedine (hexamidine 0.1%), and these confirmed both immediate and delayed type hypersensitivity on immediate (Figure 1B) and delayed readings on day (D)2 (Figure 1C). Although allergic contact dermatitis in response to antiseptics is common, we should be aware that occasionally this may co-exist with immediate-type hypersensitivity, and also with molecules frequently sold over the counter. Keywords: case report; delayed hypersensitivity; hexamidine; immediate hypersensitivity EN case report delayed hypersensitivity hexamidine immediate hypersensitivity 580 582 3 10/22/21 20211101 NES 211101 CASE REPORT A 66-year-old man with a history of arterial hypertension (treated by dietary approaches only), allergic rhinitis, asthma, and atopic dermatitis, developed a grade II anaphylactic reaction 5 minutes after the first intranasal application of hexamidine (Desomedine, Chauvin Bausch & Lomb laboratory, Montpellier, France) for a cold. [Extracted from the article]