Generic Name: memantine (meh MAN teen)Brand Names: Namenda
Memantine reduces the actions of chemicals in the brain that may contribute to the symptoms of Alzheimer's disease.
Memantine is used to treat moderate to severe dementia of the Alzheimer's type.
Memantine may also be used for other purposes not listed in this medication guide.
Before using memantine, tell your doctor if you are allergic to any drugs, or if you have a seizure disorder, cataracts, liver or kidney disease, or a bladder or kidney infection.Memantine can cause side effects that may impair your thinking or reactions. Be careful if you drive or do anything that requires you to be awake and alert.
Before using memantine, tell your doctor if you are allergic to any drugs, or if you have:
epilepsy or other seizure disorder;
kidney disease; or
a bladder or kidney infection.
If you have any of these conditions, you may need a dose adjustment or special tests to safely take memantine.FDA pregnancy category B. This medication is not expected to be harmful to an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant during treatment. It is not known whether memantine passes into breast milk or if it could harm a nursing baby. Do not use this medication without telling your doctor if you are breast-feeding a baby.
Take this medication exactly as it was prescribed for you. Do not take the medication in larger amounts, or take it for longer than recommended by your doctor. Follow the directions on your prescription label.
Your doctor may occasionally change your dose to make sure you get the best results from this medication.Take this medicine with a full glass of water.
Memantine can be taken with or without food.
The liquid (oral solution) form of this medication comes with patient instructions for safe and effective use. Follow these directions carefully. Ask your doctor or pharmacist if you have any questions.Do not mix the oral solution with any other liquids.
Rinse the empty oral syringe with clean water and allow it to air dry after every use.
It is important to use memantine regularly to get the most benefit. Get your prescription refilled before you run out of medicine completely.
To be sure this medication is helping your condition, and is not causing harmful effects, doctor will need to check your progress on a regular basis. Do not miss any scheduled appointments.Store memantine at room temperature away from moisture and heat. Keep the liquid medicine bottle tightly closed with the cap provided. Do not store the bottle with the oral syringe in it.
See also: Memantine dosage in more detail
Take the missed dose as soon as you remember. If it is almost time for your next dose, skip the missed dose and take the medicine at your next regularly scheduled time. Do not take extra medicine to make up the missed dose.
Overdose symptoms may include restlessness, drowsiness, unusual behavior, hallucinations, feeling light-headed, or fainting.
cough, chest tightness, fever, trouble breathing;
chest pain, fast heart rate;
sudden numbness or weakness, especially on one side of the body;
lack of coordination;
fainting or seizure (convulsions);
urinating less than usual or not at all;
pale skin, easy bruising or bleeding, unusual weakness; or
increased blood pressure (severe headache, blurred vision, trouble concentrating, chest pain, numbness, seizure).
Less serious side effects may include:
nausea, vomiting, diarrhea, constipation, loss of appetite;
dizziness, tired feeling;
swelling in your hands or feet;
fast heart rate;
easy bruising or bleeding, unusual weakness;
redness or swelling of or around your eyes; or
urinating more than usual.
This is not a complete list of side effects and others may occur. Tell your doctor about any unusual or bothersome side effect. You may report side effects to FDA at 1-800-FDA-1088.
Usual Adult Dose for Alzheimer's Disease:
Initial: 5 mg orally once daily, then titrated upwards by 5 mg per week.Maintenance: 5 mg once daily up to 10 mg twice daily.Maximum daily dose should not exceed 20 mg per day.
Before taking memantine, tell your doctor if you are using any of the following drugs:
nicotine (Commit, Habitrol, Nicoderm, Nicotrol, Nicorette);
quinidine (Cardioquin, Quinadex, Quinaglute);
sodium bicarbonate (Alka-Seltzer, baking soda antacid home remedy);
antiviral medication such as amantadine (Symmetrel) or rimantadine (Flumadine);
cold or cough medicine that contains dextromethorphan;
a diuretic (water pill) such as hydrochlorothiazide (HCTZ, HydroDiuril, Hyzaar, Lopressor, Vasoretic, Zestoretic) or triamterene (Dyrenium, Maxzide, Dyazide);
medicine to treat glaucoma, such as acetazolamide (Diamox), dichlorphenamide (Daranide), or methazolamide (Neptazane, MZM, Glauctabs); or
an oral diabetes medicine that contains metformin (such as Fortamet, Glucophage, Actoplus Met, Avanda met, Metaglip, Glucovance).
This list is not complete and there may be other drugs that can interact with memantine. Tell your doctor about all the prescription and over-the-counter medications you use. This includes vitamins, minerals, herbal products, and drugs prescribed by other doctors. Do not start using a new medication without telling your doctor.