What side effects may I notice from receiving Nizatidine?

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
-breast swelling and tenderness
-confusion or hallucinations
-dark urine
-irritated, nervous
-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):
-change in sex drive or performance
-constipation
-diarrhea
-dizziness
-headache

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