Most of these individuals have been cautioned by their doctor to avoid sulfite-containing foods or beverages. The number of asthmatic patients that are included in this sulfite sensitive group is estimates to be 500,000 in the United States. The symptoms of a sulfite sensitivity reaction vary from mild to life-threatening. The most common symptoms are mild and involve a skin rash accompanied by redness, hives, itching, flushing, tingling and swelling. Respiratory symptoms include difficulty breathing, wheezing, and stridor.
Gastrointestinal reactions involve nausea and stomach cramps.
Much less common but more serious sings and symptoms of sulfite sensitivity are low blood pressure, shock, extreme difficulty breathing and loss of consciousness. As noted above, these symptoms of a severe reactions are most apt to occur in the steroid-dependant asthmatic person. I get headaches, stuffy nose, and rosy cheeks from red wine. Technically, this is not an allergic reaction. This is not related to sulfite content of the wine but probably due to other substances contained within the wine such as histamines, tyramine, and phenolic flavonoids.