Get emergency medical help if you have signs of an allergic reaction to Amitiza: hives; difficult breathing; swelling of your face, lips, tongue, or throat.
Call your doctor at once if you have:
trouble breathing;
severe or ongoing nausea or diarrhea; or
a light-headed feeling, like you might pass out.
You may have low blood pressure and feel faint shortly after taking this medicine, especially if you've been sick with vomiting or diarrhea. Stop taking Amitiza and call your doctor if you feel light-headed after every dose.
Common Amitiza side effects may include:
nausea, stomach pain;
diarrhea, gas, bloating; or
headache.
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
 Amitiza side effects (more detail)
