Get emergency medical help if you have any of these signs of an allergic reaction to Generic Alli: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.
Stop using Generic Alli and call your doctor at once if you have a serious side effect such as:
- severe pain in your lower back, blood in your urine;
- urinating less than usual or not at all;
- drowsiness, confusion, mood changes, increased thirst;
- swelling, weight gain, feeling short of breath;
- severe pain in your upper stomach spreading to your back, nausea and vomiting, fast heart rate; or
- nausea, itching, loss of appetite, dark urine, clay-colored stools, jaundice (yellowing of the skin or eyes).
The following side effects occur commonly with the use of Generic Alli. They are the natural effects of orlistat's fat-blocking action and are actually signs that the medication is working properly. These side effects are usually temporary and may lessen as you continue treatment with Generic Alli:
- oily spotting in your undergarments;
- oily or fatty stools;
- orange or brown colored oil in your stool;
- gas with discharge, an oily discharge;
- loose stools, or an urgent need to go to the bathroom, inability to control bowel movements;
- an increased number of bowel movements;
- stomach pain, nausea, vomiting, diarrhea, rectal pain; or
- weakness, dark urine, clay-colored stools, itching, loss of appetite, or jaundice (yellowing of the skin or eyes).