I have been taking Alli for four days, one pill three times a day. So far I have experienced orange oil stools when I have to go to the bathroom, but no loose stools, or uncontrollable stools. However my Aunt stayed in the bathroom and even messed her pants and did not even feel it due to the oily substance (fat) that comes out. I guess it just depends on the person. So far so good for me, I'll let you know if that changes.