xenical and caffeine pills are not anywhere near the same. Xenical is designed for those who eat a high fat diet. It is to re-train you to eat less fat overall, by discouraging those choices by creating some horrible, fairly quick side effects from fat consumption.
Be sure to contact Hoffman LaRoche about their wellness plan. They offer food and exercise guides and dietician counselling and telephone support for FREE to patients on Xenical!!! The support is excellent. Take advantage of it.!