Anyone who's had a lactose tolerance test please tell me what goes on? Do you have to eat things that make you sick before hand??Milk, cheese etc? Any prep involved? What do you have to drink when you get there?What's it taste like ? does it make you have diarrhea just as if you've had dairy foods??I'm going to be in this study on this new drug alosetram and the girl says I have to have this test and that makes me nervous. If I could eat these kinds of things I wouldn't have IBS!!!