Rachael I used xenical years ago right around when it first came out (98-99)and I didn't have very good luck with it.
You have to be very careful what you eat and I mean VERY careful, otherwise you will end up spending a lot of time in the bathroom and you can even end up inadvertently soiling yourself.
A lot of times with that drug you will have some bloat and gas and you must make sure to pass it in the bathroom because a lot of people experience an oily diarrhea which can almost leak out if you eat fatty type foods.
I luckily never had any accidents but heard a lot of horror stories and had some near misses.
I would highly recommend that you talk with your Doctor and make sure that it is right for you before staring.
Good Luck!