What side effects may I notice from receiving Amitiza?

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

-allergic reactions (skin rash, itching or hives; swelling of the face, lips, or tongue)
-feeling faint or lightheaded, falls
-new or worsening stomach pain
-severe or prolonged diarrhea
-vomiting
Side effects that usually do not require medical attention (report to your doctor or health care professional if they continue or are bothersome):

-headache
-loose stools
-nausea

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