Generic Name: Namenda Brand Name(s): Generics only. No brands available.


What is Namenda® (memantine) used for?

Namenda® reduces the actions of chemicals in the brain that may contribute to the symptoms of Alzheimer’s disease.

Namenda® is used to treat moderate to severe dementia of the Alzheimer’s type.

Namenda® may also be used for purposes not listed in this medication guide.

How should I take Namenda® (memantine)?

Take Namenda® exactly as it was prescribed for you. Follow all directions on your prescription label. Your doctor may occasionally change your dose to make sure you get the best results. Do not take this medicine in larger or smaller amounts or for longer than recommended.

Namenda® can be taken with or without food.

Do not crush, chew, break, or open an extended-release capsule. Swallow it whole.

To make swallowing easier, you may open the extended-release capsule and sprinkle the medicine into a spoonful of applesauce. Swallow right away without chewing. Do not save the mixture for later use.

Measure liquid medicine (oral solution) with the dosing syringe provided, or with a special dose-measuring spoon or medicine cup. If you do not have a dose-measuring device, ask your pharmacist for one.

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.

Use Namenda® regularly to get the most benefit. Get your prescription refilled before you run out of medicine completely.

Your doctor will need to check your progress while you are using Namenda®.

How do I store Namenda® (memantine)?

Namenda® is best stored at room temperature away from direct light and moisture. To prevent drug damage, you should not store Namenda® in the bathroom or the freezer. There may be different brands of Namenda® that may have different storage needs. It is important to always check the product package for instructions on storage, or ask your pharmacist. For safety, you should keep all medicines away from children and pets.

You should not flush Namenda® down the toilet or pour them into a drain unless instructed to do so. It is important to properly discard this product when it is expired or no longer needed. Consult your pharmacist for more details about how to safely discard your product.

Precautions & warnings

What should I know before using Namenda® (memantine)?

Before using this drug, tell your doctor if:

  • You are pregnant or breastfeeding. This is because, while you are expecting or feeding a baby, you should only take medicines on the recommendation of a doctor.
  • You are taking any other medicines. This includes any medicines you are taking which are available to buy without a prescription, such as herbal and complementary medicines.
  • You have allergy with any of active or inactive ingredients of Namenda® or other medications.
  • You have any other illnesses, disorders, or medical conditions.

To make sure Namenda® is safe for you, tell your doctor if you have:

  • Epilepsy or other seizure disorder
  • Liver disease
  • Kidney disease
  • Urination problems
  • A bladder or kidney infection

Is it safe during pregnancy or breastfeeding?

There are no adequate studies in women for determining risk when using Namenda® during pregnancy or while breastfeeding. Please always consult with your doctor to weigh the potential benefits and risks before taking Namenda®. Namenda® is pregnancy risk category B, according to the US Food and Drug Administration (FDA).

FDA pregnancy risk category reference below:

  • A=No risk
  • B=No risk in some studies
  • C=There may be some risk
  • D=Positive evidence of risk
  • X=Contraindicated
  • N=Unknown

Side effects

What side effects can occur from Namenda® (memantine)?

Get emergency medical help if you have signs of an allergic reaction to Namenda®: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Call your doctor at once if you have:

  • Severe headache, blurred vision, pounding in your neck or ears
  • Seizure (convulsions)
  • Unusual changes in mood or behavior

Common side effects may include:

  • Diarrhea
  • Dizziness
  • Headache

Not everyone experiences these side effects. There may be some side effects not listed above. If you have any concerns about a side-effect, please consult your doctor or pharmacist.


What drugs may interact with Namenda® (memantine)?

Namenda® may interact with other drugs that you are currently taking, which can change how your drug works or increase your risk for serious side effects. To avoid any potential drug interactions, you should keep a list of all the drugs you are using (including prescription drugs, nonprescription drugs, and herbal products) and share it with your doctor and pharmacist. For your safety, do not start, stop, or change the dosage of any drugs without your doctor’s approval.

Products that may interact with this drug are:

  • Amantadine
  • Zonisamide
  • Cough medicine that contains dextromethorphan (Delsym, Robitussin Maximum Strength, Vicks 44, and others)
  • Medicines to make the urine alkaline – urine sodium bicarbonate, potassium citrate (K-Lyte, Urocit-K), sodium citrate and citric acid (Bicitra, Oracit), or sodium citrate and potassium (Citrolith, Polycitra)
  • Medicine to treat glaucoma or increased pressure inside the eyes – acetazolamide, methazolamide

Does food or alcohol interact with Namenda® (memantine)?

Namenda® may interact with food or alcohol by altering the way the drug works or increase the risk for serious side effects. Please discuss with your doctor or pharmacist any potential food or alcohol interactions before using this drug.

What health conditions may interact with Namenda® (memantine)?

Namenda® may interact with your health condition. This interaction may worsen your health condition or alter the way the drug works. It is important to always let your doctor and pharmacist know all the health conditions you currently have.


The information provided is not a substitute for any medical advice. You should ALWAYS consult with your doctor or pharmacist before using Namenda® (memantine).

What is the dose of Namenda® (memantine) for an adult?

The recommended starting dose is 5 mg once daily. The dose should be increased in 5 mg increments to 10 mg/day (5 mg twice daily), 15 mg/day (5 mg and 10 mg as separate doses), and 20 mg/day (10 mg twice daily).

The minimum recommended interval between dose increases is one week. The dosage shown to be effective in controlled clinical trials is 20 mg/day.

Namenda® can be taken with or without food. If a patient misses a single dose of Namenda®, that patient should not double up on the next dose. The next dose should be taken as scheduled.

If a patient fails to take Namenda® for several days, dosing may need to be resumed at lower doses and retitrated as described above.

What is the dose of Namenda® (memantine) for a child?

The dosage has not been established in pediatric patients. It may be unsafe for your child. It is always important to fully understand the safety of the drug before using. Please consult with your doctor or pharmacist for more information.

How is Namenda® (memantine) available?

Namenda® is available in the following dosage forms and strengths:

  • Tablet, oral solution: memantine hydrochloride 5mg

What should I do in case of an emergency or overdose?

In case of an emergency or an overdose, call your local emergency services or go to your nearest emergency room.

What should I do if I miss a dose?

If you miss a dose of Namenda®, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and take your regular dose as scheduled. Do not take a double dose.

Hello Health Group does not provide medical advice, diagnosis or treatment.

Review Date: August 14, 2017 | Last Modified: September 2, 2017

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