What side effects may I notice from receiving Colesevelam?

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
-bloody or black, tarry stools
-breathing problems
-muscle pain
-nausea, vomiting
-severe stomach pain

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

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