both at 0.5% in water. Twelve control subjects were Case report prick-tested to these two ingredients, with negative reactions, indicating that the patient had an immunologically A 67-year-old man attended for routine flexible cystoscopy for irritative lower urinary tract symptoms. He mediated contact urticaria to chlorhexidine. received no systemic premedication but the skin of the genitalia was prepared with cetrimide 0.5%, chlorhexid-
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