Namenda XR

Generic Name: Memantine

  • What is Namenda XR?

    Namenda XR is used to treat patients with Alzheimer's disease.

  • What is the most important information I should know about Namenda XR?

    If you accidentally take more Namenda XR than you should, inform your doctor immediately. You may require medical attention. Some people who have accidentally taken too much memantine (the active ingredient in Namenda XR) have experienced dizziness, unsteadiness, weakness, tiredness, confusion, and other symptoms.

  • Who should not take Namenda XR?

    Do not take Namenda XR if you are allergic to any of its ingedients.

  • What should I tell my doctor before I take the first dose of Namenda XR?

    Tell your doctor about all prescription, over-the-counter, and herbal medications you are taking before beginning treatment with Namenda XR. Also, talk to your doctor about your complete medical history, especially if you have kidney or liver disease, a history of seizures or difficulty urinating, or if you have a urinary tract infection.

  • What is the usual dosage?

    The information below is based on the dosage guidelines your doctor uses. Depending on your condition and medical history, your doctor may prescribe a different regimen. Do not change the dosage or stop taking your medication without your doctor's approval.

    Adults: Your doctor will start you at a low dose (7 milligrams [mg] once a day) and will then gradually increase your dose over a few weeks, until you reach a daily dose of 28 mg.

  • How should I take Namenda XR?

    You may take Namenda XR with or without food.

    Swallow the capsule whole; never crush, divide, or chew it. Alternatively, the capsule may be opened and sprinkled on applesauce before swallowing, but the contents of the entire capsule should be taken and the dose should not be divided.

  • What should I avoid while taking Namenda XR?

    You should avoid food and drugs that make the urine alkaline, such as sodium bicarbonate. Urine that is alkalinized will affect how your body eliminates Namenda XR and may increase your risk for side effects. Talk to your doctor about what foods and drugs should be avoided.

  • What are possible food and drug interactions associated with Namenda XR?

    If Namenda XR is taken with certain other drugs, the effects of either could be increased, decreased, or altered. It is especially important to check with your doctor before combining Namenda XR with the following: carbonic anhydrase inhibitors (such as acetazolamide), cimetidine, diuretics (water pills) such as hydrochlorothiazide and triamterene, metformin, nicotine, other NMDA antagonists (such as amantadine, dextromethorphan, ketamine), quinidine, ranitidine, and sodium bicarbonate.

  • What are the possible side effects of Namenda XR?

    Side effects cannot be anticipated. If any develop or change in intensity, tell your doctor as soon as possible. Only your doctor can determine if it is safe for you to continue taking this drug.

    Side effects may include: anxiety, back pain, constipation, diarrhea, dizziness, drowsiness, headache, high blood pressure, increased weight, influenza

  • Can I receive Namenda XR if I am pregnant or breastfeeding?

    The effects of Namenda XR during pregnancy are unknown. You should not breastfeed during treatment with Namenda XR. Tell your doctor immediately if you are pregnant, plan to become pregnant, or are breastfeeding.

  • What should I do if I miss a dose of Namenda XR?

    If you miss a dose of Namenda XR, take the missed dose as soon as you remember. However, if it is almost time for your next dose, skip the one you missed and return to your regular dosing schedule. Do not take two doses at once.

    If you have forgotten to take Namenda XR for several days, do not take the next dose until you have talked to your doctor.

  • How should I store Namenda XR?

    Store at room temperature.

Meet the Pharmacists

I'm Shereen A. Gharbia, PharmD. Welcome to PDR Health!

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