[Brief update on bisulfite allergy].

The consumption of bisulphites is considerable in the general population as it is a preservative that is used both in foods and medications. Nevertheless, incidents or accidents of hypersensitivity are rare, but special attention must be given to subjects at risk: asthmatics and those who are allergic and intolerant to aspirin. The course to follow is to consider these three principal points: To watch for clinical signs that may precede more severe accidents. To recognize the responsibility of sulphites and detect the mechanism. Inform the patient of the need to avoid it as far as possible: any label that is coded with preservatives E 220 to E 227.