There have been some reported cases of allergic reactions to Sucralose, although they are relatively rare. Allergies to Sucralose are not as common as allergies to other artificial sweeteners like aspartame or saccharin. 

Symptoms of an allergic reaction to Sucralose may include hives, itching, swelling, difficulty breathing, and in severe cases, anaphylaxis. If you suspect you are having an allergic reaction to Sucralose, you should seek medical attention immediately. 

It is important to note that some people may have a sensitivity to Sucralose, which can cause gastrointestinal symptoms such as bloating, gas, and diarrhea. This is not the same as an allergic reaction, but it may still be uncomfortable for those affected. 

If you have a known allergy to Sucralose, it is important to read food labels carefully and avoid products that contain this artificial sweetener. It is also a good idea to speak with a healthcare provider or allergist to determine the best course of action for managing your allergy.