How effective are the orlistat and alli diet pills?

Moderately: Orlistat (or alli) keeps the body from absorbing a lot of fat in the food. If you are able to stay on a low fat diet, you can lose weight on it. However if you eat a fatty meal, you can have diarrhea and intestinal discomfort.

Fair: Alli belongs to a class of drugs called lipase inhibitors. Such medications block the intestines from absorbing some of the fat in the foods that you eat. Specifically, Alli blocks about 25% of the fat that you consume. Fats that are not absorbed exit your body through stools, or bowel movements. Eating correctly is the key cut the carbs, drink water, see your md for help!