"i used alli  for about three weeks .  i didn&#039;t notice it helping me lose  weight faster than i can with a weight watchers program . it did increase my bowel movements. i did have some stomach discomfort and gas. i stopped using it at the end of the third week because i went out to dinner and took my pill with my meal  and it made me extremely ill.  vomiting and  diarrhoea  for over eight hours !!!  i would not recommend this product to anybody !!!  weight watchers is working out very well for me .  eating healthy and exercise is the only way to go, there is no magic pill!!!  i had to find out the hard way !"