What side effects may I notice from receiving Penicillin?

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 watery diarrhea
-fever
-redness, blistering, peeling or loosening of the skin, including inside the mouth
Side effects that usually do not require medical attention (report to your doctor or health care professional if they continue or are bothersome):

-headache
-nausea
-pain, redness or irritation at the site where injected
-vomiting

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