I have taken Alli also, but only sporatically. My sister-in-law uses them, and gave me a handful. I've taken them before some meals, and even for 3 days straight took two with lunch and dinner - also ate high-fat and calorie foods to see what would happen. never had BM for days. I actually started using them along with "Miracal" - which is an over-the-counter laxative that is a powder you mix in with drink. It works WONDERFULLY! Let me know how things are going with your Alli use...
Jen