I started Alli on Sunday, June 17th and so far I haven't encountered any treatment effects. What people are failing to do is read in between the lines; it said that you MAY get these symptoms not that they are guaranteed. Some people's bodies are better able to handle certain medications while others are not, it's just up to your body.
Now, I am not willing to test out these treatment effects but my bowel movements have changed but not anything "oily". Remember folks, these are just side effects, not everyone encounter the same side effects due to medications.