What side effects may I notice from receiving Xenical?

Side effects that you should report to your doctor or health care professional as soon as possible:

-allergic reactions like skin rash, itching or hives, swelling of the face, lips, or tongue
-breathing problems
-bloody or black, tarry stools
-signs and symptoms of kidney stones like blood in the urine; pain in the lower back or side; pain when urinating
-signs and symptoms of liver injury like dark yellow or brown urine; general ill feeling or flu-like symptoms; light-colored stools; loss of appetite; nausea; right upper belly pain; unusually weak or tired; yellowing of the eyes or skin
-trouble passing urine or change in the amount of urine
-uncontrolled, urgent bowel movements
-vomiting
Side effects that usually do not require medical attention (report to your doctor or health care professional if they continue or are bothersome):

-gas
-increased number of bowel movements
-oily stools (bowel movements may be clear, orange or brown in color)
-upset stomach

This list may not describe all possible side effects for Xenical. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.