It is probably better to know which patients are sensitive to sulphites than to expose them to chronic subclinical bronchospasm induced by diet. If sensitivity to sulphite preservatives remains unclear, a sulphite challenge can be performed but this should be performed only in a clinical setting where immediate resuscitative measures can be instituted. Prudent advice would be for all asthmatics to avoid sulphites rather than perform challenge studies. Treatment Avoidance of sulphite preservatives remains the mainstay of treatment. Food labels should be read carefully.
Steroids appear to have no protective effect.
When eating in restaurants, sulphite-sensitive asthmatics should carry bronchodilator inhalers with them. Patients with exquisite sensitivity to sulphites should wear a Medic Alert bracelet or disc.