What side effects may I notice from receiving Engerix-B?

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
-confused, irritated
-fast, irregular heartbeat
-flu-like syndrome
-numb, tingling pain
-seizures
-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
-fever
-headache
-loss of appetite
-muscle pain
-nausea
-pain, redness, swelling, or irritation at site where injected
-tiredness

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