What Are The Side Effects?

You may experience bowel changes when taking Alli. Ads and marketing materials refer to these changes as "treatment effects." These side effects can include:

* Gas with an oily anal discharge
* Loose stools or diarrhea
* More frequent bowel movements
* Hard-to-control bowel movements

These bowel changes result from the undigested fat going through your digestive system. You can limit the side effects by eating a low-fat diet.