I have been on Alli for two weeks on Thursday, but I started having pain on the lower left side of my stomach and lots of very strong gas pain. Are both of these side effects? I did eat alot of fatty foods yesterday. The lower left side stomach pain is the concern of mine...

Tina 

Hello. While gas pain and stomach upset are possible while using alli - especially if you eat too much fat - if the pain is concerning you or severe you should contact your doctor to be sure it is not something else going on.

To report the occurrence of treatment effects and/or any adverse events related to alli, you may call our customer service line at 1-800-671-2554 (M-F 9am to 9pm EST).