What side effects may I notice from receiving Memantine?

Side effects that you should report to your doctor or health care professional as soon as possible:
-agitation or a feeling of restlessness
-allergic reactions like skin rash, itching or hives, swelling of the face, lips, or tongue
-depressed mood
-dizziness
-hallucinations
-redness, blistering, peeling or loosening of the skin, including inside the mouth
-seizures
-vomiting

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

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