What side effects may I notice from receiving Cimetidine?

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
-agitation, nervousness, depression, hallucinations
-breast swelling, tenderness
-change in sex drive or performance
-dark urine
-redness, blistering, peeling or loosening of the skin, including inside the mouth
-yellowing of the eyes or skin

Side effects that usually do not require medical attention (report to your doctor or health care professional if they continue or are bothersome):
-diarrhea
-headache
-nausea, vomiting

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