What side effects may I notice from receiving Alosetron?

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 diarrhea or blood in the stool
-constipation
-new or worsening abdominal pain
Side effects that usually do not require medical attention (report to your doctor or health care professional if they continue or are bothersome):

-nausea
-stomach pain

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