What kind of reaction are you having?
I don't use any artificial sweeteners at all. I drink water or herbal tea. I use a very good quality whey isolate protein powder (BioChem) that is soy free, 99% lactose free, gluten free, and has no added sugars or artificial sweeteners/flavors. I get it at sprouts and add it to my smoothies, yoghurt, soups, beans, just about anything.
Getting rid of the sweet tooth is a real help with avoiding temptations later. For me, a piece of fruit tastes so sweet it is amazing - I almost feel guilty!