- Uncontrollable bowel movements (a bowel movement you are unable to hold in) can be a side effect of the Alli diet.
- Oily anal leakage can happen if you are eating more fats than recommended while taking Alli. You may not realize it until you see oily spots in your underwear.
- You may experience a release of an oily substance when you pass gas.
- Because Alli prevents your body from absorbing some fat, it will have to pass through your bowel instead. This can cause more frequent and looser bowel movements.
- Alli can interfere with certain medications. Be sure to talk to your doctor before taking the Alli pill.







