Some Namenda side effects include:
Tiredness, body aches, joint pain, dizziness, nausea, vomiting, diarrhea, constipation, loss of appetite, weight loss, headache, swelling in your hands or feet, fast heart rate, easy bruising or bleeding, unusual weakness, anxiety, aggression, skin rash, redness or swelling of or around your eyes, or urinating more than usual
Some serious Namenda side effects include:
Hallucinations, shortness of breath, chest tightness, trouble breathing, sudden numbness or weakness, seizures, urinating less than usual or not at all, pale skin, easy bleeding or bruising, or increased blood pressure
If any side effects of Memantine become unmanageable speak with your doctor or pharmacist for help in managing any side effects. For any serious side effects that occur speak with your doctor right away for further treatment options.