DEAR ABBY: I recently made a batch of pancakes for my healthy 14-year-old son, using a mix that was in our pantry. He said that they tasted "funny," but ate them anyway. About 10 minutes later, he began having difficulty breathing and his lips began turning purple. I gave him his allergy pill, had him sit on the sofa and told him to relax. He was wheezing while inhaling and exhaling.

My husband, a volunteer firefighter and EMT, heated up some water, and we had my son lean over the water so the steam could clear his chest and sinuses. Soon, his breathing became more regular and his lips returned to a more normal color.

We checked the date on the box of pancake mix and, to my dismay, found it was very outdated. As a reference librarian at an academic institution, I have the ability to search through many research databases. I did just that, and found an article the next day that mentioned a 19-year-old male DYING after eating pancakes made with outdated mix. Apparently, the mold that forms in old pancake mix can be toxic!

When we told our friends about my son's close call, we were surprised at the number of people who mentioned that they should check their own pancake mix since they don't use it often, or they had purchased it some time ago. With so many people shopping at warehouse-type stores and buying large sizes of pancake mix, I hope your readers will take the time to check the expiration date on their boxes. — SUE IN WYANTSKILL, N.Y.

DEAR SUE: Thank you for the warning. I certainly was not aware that pancake mix could turn moldy and cause an allergic reaction in someone with an allergy to mold — but it's logical. I wonder if the same holds true for cake mix, brownie mix and cookie mix. If so, then a warning should be placed on the box for people like me.

We hear so often about discarding prescription and over-the-counter medications after their expiration dates, but I don't recall warnings about packaged items in the pantry. Heads up, folks!

Origins: In April 2006, the experience of a 14-year-old who had eaten pancakes made from a mix that had gone moldly was described in the popular newspaper column Dear Abby. The account has since been circulated widely on the Internet as scores of concerned homemakers ponder the safety of the pancake mix lurking in their larders.

There is truth in tale. Yet its inherent warning is overblown.

While we cannot vet the incident described by "Sue in Wyantskill" involving her 14-year-old son, the underlying claim is provably true — it is possible for someone who chows down on pancakes made from a mix that has sat around too long to suffer a potentially fatal anaphylactic reaction to the molds that have grown therein. We know this to be so because it has happened before, and the resultant death was documented.

In 2001, two pathologists practicing in Charleston, South Carolina, reported on an unnamed 19-year-old who died in such a manner. While home on vacation from college, the victim, a young man with a history of allergies (including mold), polished off two pancakes made from a packaged mix that had sat open in a kitchen cabinet for about two years — even though his two friends stopped eating their portions, complaining that the griddlecakes tasted like rubbing alcohol. Very quickly thereafter, while watching television, the ill-fated collegian experienced shortness of breath that was not relieved by his inhaler. He asked his friends to take him to a clinic not far from the home, and he was reported to have turned a bit blue from lack of oxygen (i.e., became cyanotic) during the ride. While he did manage to walk into the clinic on his own, once inside he suddenly collapsed in cardiopulmonary arrest. He failed to respond to resuscitative efforts and was pronounced dead.

The cause of his death was determined to be anaphylaxis due to an allergic reaction to molds.

Anaphylaxis is a rapidly developing immunologic reaction that occurs when those who have allergies come in contact with the substances they are allergic to. When it kills, it does so by triggering fatal respiratory or cardiac arrest.

The pancake mix that delivered a toxic payload was analyzed and found to contain four rather nasty molds: Penicillium, Fusarium, Mucor, and Aspergillus. The decedent had not been allergic to eggs (which are a component of pancakes), so there was no doubt as to which allergy had killed him. It had been mold, and nothing but.

There was a death, and it had been due to ancient pancake mix. Or, rather, to an allergic reaction to the mold that had grown in the stale pancake mix.

It needs be kept in mind there is nothing inherently toxic about pancake mix that has passed its freshness date, the product's getting old does not transform it into a poison, nor does the growth of mold within opened boxes of flapjack powder turn it into something that will fell all who ingest it. Only those who have allergies to mold are at risk, and even then, for the pancake mix to pose a hazard it has to contain mold spores, not just be over the hill.

For mold to gain access to a food product, the foodstuff has to be exposed to its spores. Pancake mix cocooned in an unbreached wax paper, plastic, or a foil pouch within its outer packaging wouldn't have this contact and should still be safe no matter how old it gets. However, mix sold unpouched in cardboard boxes or paper sacks would likely be at risk even if the box or sack hadn't previously been opened, because such packaging would not necessarily keep dampness out, and mold thrives in damp environments.

What does all this mean? If you don't have a mold allergy, you needn't fear your pancake mix; if you do have such a sensitivity, you shouldn't keep your flapjack makings around for a few years after opening the box or pouch it came in. It's not worth dying over 50¢ worth of pancake mix, so when in doubt, throw it out.