Generic Name: Memantine

  • What is Namenda?

    Namenda is a medication used to treat Alzheimer's disease.

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

    If you accidentally take more Namenda 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) have experienced dizziness, unsteadiness, weakness, tiredness, confusion, and other symptoms.

  • Who should not take Namenda?

    Do not take Namenda if you are allergic to it or any of its ingredients.

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

    Tell your doctor about all prescription, over-the-counter, and herbal medications you are taking before beginning treatment with Namenda. Also, talk to your doctor about your complete medical history, especially if you have kidney or liver disease, a history of seizures, 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: The usual starting dose is 5 milligrams (mg) taken once daily. Your doctor may increase your dose gradually as needed to a usual maintenance dose of 20 mg daily (taken as two 10-mg doses).

  • How should I take Namenda?

    Namenda may be taken with or without food. A daily dose of 5 mg should be taken in the morning, and all doses higher than 5 mg should be divided into two doses taken every morning and evening.

    If you are taking Namenda oral solution, your doctor will provide instructions on how to use the dosing device. Do not mix Namenda oral solution with any other liquid.

  • What should I avoid while taking Namenda?

    Certain foods and drugs may cause changes in your urine. This may affect the way your body eliminates Namenda and can cause an increase in unwanted side effects. Talk to your doctor about what foods and drugs should be avoided.

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

    If Namenda 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 with the following: carbonic anhydrase inhibitors (such as acetazolamide), cimetidine, diuretics (water pills) such as hydrochlorothiazide and triamterene, metformin, nicotine, NMDA antagonists (such as amantadine, dextromethorphan, ketamine), quinidine, ranitidine, and sodium bicarbonate.

  • What are the possible side effects of Namenda?

    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: back pain, confusion, constipation, cough, dizziness, hallucinations, headache, high blood pressure, pain, shortness of breath, tiredness, vomiting

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

    The effects of Namenda during pregnancy and breastfeeding are unknown. 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?

    If you miss a dose of Namenda, take it 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.

  • How should I store Namenda?

    Store at room temperature.

Meet the Pharmacists

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

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