This is an except from
this website about the side effects of Xenical:- (just to clarify orlstat is Xenical)
What are the possible side effects of orlistat?
Stop taking orlistat and seek emergency medical attention if you experience a rare allergic reaction including shortness of breath; closing of your throat; swelling of your lips, tongue, or face; or hives.
Other, less serious side effects are more likely to occur. Continue to take orlistat and talk to your doctor if you experience
· oily spotting;
· oily or fatty stools;
· orange or brown colored oil in your stool;
· gas with discharge, an oily discharge;
· an urgent need to go to the bathroom;
· an inability to control bowel movements, or;
· an increased number of bowel movements.
The bowel changes listed above are a natural effect of blocking fat and indicate that orlistat is working. They generally occur early in treatment, particularly after meals containing higher amounts of fat than are recommended. These symptoms are usually temporary and lessen or disappear as you continue treatment and keep to your recommended diet of meals containing 30% fat.
Side effects other than those listed here may also occur. Talk to your doctor about any side effect that seems unusual or that is especially bothersome.
