Hi bsmith81,
Mild abdominal discomfort can occur while taking alli and eating meals that may contain a bit too much fat. Even though you may not be going over your fat target, you GI tract may need to adjust to alli and the digestion of fat. This normally passes after a few days.
Watch what you are eating, especially the amount of fat. Include high fiber foods as well as keeping yourself hydrated. If these symptoms persists or worsen then you will need to check with your physician as well as discontinue use of the product.
Best of health.
Sophia De Monte RPh