What side effects may I notice from receiving Miglitol?

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
-breathing problems
-changes in vision
-unusual bleeding or bruising
-unusually weak or tired

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

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