[technothrasher]

> Sucralose, a chemical completely unrelated to sucrose

Seeing as how it is made directly from the sucrose, I'm not sure how you can say it is "completely unrelated". It is identical to sucrose except for the substitution of three chlorine atoms for hydroxyl groups.

Have you seen an allergist about your reaction? They should be able to do a skin test to confirm the allergy, and I'm sure they would be quite interested, as there seem to be no reports in the medical literature of sucralose allergies.