What side effects may I notice from receiving Linzess?

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
-black, tarry stools
-bloody or watery diarrhea
-new or worsening stomach pain
-severe or prolonged diarrhea

Side effects that usually do not require medical attention (report to your doctor or health care professional if they continue or are bothersome):

-bloating
-gas
-loose stools

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