What side effects may I notice from receiving Betaseron?

Side effects that you should report to your doctor or health care professional as soon as possible:
-a skin sore with a black-blue color, swelling, or drainage
-allergic reactions like skin rash, itching or hives, swelling of the face, lips, or tongue
-depression or nervousness
-difficulty breathing
-fever, chills, or any other sign of infection
-rapid heartbeat or palpitations
-severe stomach pain
-unusual bleeding or bruising
-unusually weak or tired
-yellowing of the skin or eyes

Side effects that usually do not require medical attention (report to your doctor or health care professional if they continue or are bothersome):
-drowsiness
-headache
-menstrual changes
-muscle aches
-pain, redness, and irritation at the injection site

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