I think you may mean "sulfa" allergy. I googled really quickly and found on one of the hits (though it's not Splenda, it is about a sweetener:
Acesulfame potassium, also known as acesulfame K, potassium acesulfame, ace K, and ACK and marketed as SunettŪ, is the latest artificial sweetener to be approved by Health Canada. While it has been deemed safe by the European Union’s Scientific Committee for Food, many individuals and organizations disagree.
According to CSPI, who spoke out against the inadequate and poor-quality testing of this sweetener, a byproduct of acesulfame potassium has been shown to negatively affect the thyroid in animals when taken in large doses. Despite peer-reviewed studies and wide consensus among the scientific community, CSPI is also concerned that the cancer-causing potential of this sweetener may not be fully understood due to the lack of long-term, up-to-date, adequate testing.
At the very least, this sweetener should be avoided by people who are on a potassium-restricted diet or who have sulfa-antibiotic-based allergies.
I'll have to do more research as my son is allergic to sulfa-based meds - I did not know this.
Last edited by claytonian : 05-26-2010 at 09:50 AM.
Reason: additional comment