Memantine (Namenda XR) is a prescription medication used to treat moderate to severe Alzheimer’s disease. It works by blocking excess glutamate activity, a neurotransmitter involved in learning and memory, which may improve symptoms such as memory, awareness, and the ability to perform daily activities. Memantine is an extended-release form taken once daily, often in combination with other Alzheimer’s treatments. Memantine is available only with a prescription and should be taken under a healthcare providers supervision.
Reviewed by:
Dr. Steve Malen, PharmD
Dr. Steven Blikstein, PharmD
Form
Strength
How would you like to get this medication?
Choose a strength and quantity to continue.
Memantine (Namenda XR) is a prescription medication used to treat moderate to severe Alzheimer’s disease. It works by blocking excess glutamate activity, a neurotransmitter involved in learning and memory, which may improve symptoms such as memory, awareness, and the ability to perform daily activities. Memantine is an extended-release form taken once daily, often in combination with other Alzheimer’s treatments. Memantine is available only with a prescription and should be taken under a healthcare provider's supervision.
Complete a health screening
A short questionnaire about your health history and current symptoms — takes about 2 minutes.
Provider reviews your answers
Provider review within 24 hours.
Prescription fulfilled
If approved, your Rx is sent to Invictus Pharmacy and you're notified by text or email. Free nationwide shipping.
Important safety information
Before starting treatment with Namenda XR, certain contraindications and precautions must be considered to prevent adverse reactions.
Understanding and addressing these contraindications and precautions ensures that Namenda XR is used safely, minimizing the risk of adverse outcomes and optimizing therapeutic effectiveness in managing Alzheimer’s disease.
Clonidine is a prescription medication used to treat high blood pressure by stimulating alpha-2 adrenergic receptors in the brain, which relaxes blood vessels and lowers pressure. It may also be prescribed off-label for ADHD, pain syndromes, or withdrawal from opioids, alcohol, or nicotine. Available as oral tablets or a weekly transdermal patch (Catapres-TTS), Clonidine helps reduce the risks of stroke, heart attack, and kidney damage. It must be taken exactly as prescribed and not stopped abruptly, as sudden withdrawal can cause rebound hypertension and other symptoms.
Divalproex is a prescription anticonvulsant and mood stabilizer used to treat seizure disorders, bipolar disorder, and to prevent migraine headaches. It works by balancing neurotransmitters in the brain to control abnormal electrical activity and stabilize mood. When taken regularly, divalproex reduces seizure frequency, prevents manic episodes, and lessens migraine occurrence. It must be taken exactly as prescribed and requires regular blood tests to monitor safe levels. Do not stop suddenly, as this can trigger seizures or symptom relapse. Rarely, divalproex can cause liver or pancreatic problems.
Donepezil is a prescription cholinesterase inhibitor used to treat symptoms of Alzheimer’s disease and other dementias. It works by increasing acetylcholine levels in the brain to improve memory, awareness, and daily functioning. While not a cure, donepezil can slow cognitive decline and enhance quality of life in patients with mild to severe Alzheimer’s disease. Donepezil should be taken exactly as prescribed, usually once daily at bedtime. Mild nausea or diarrhea may occur initially, but often lessens over time. Do not stop taking it suddenly, as symptoms may worsen.
Guanfacine is a prescription medication that contains guanfacine, a central alpha-2 adrenergic agonist that reduces sympathetic nerve signals in the brain. Depending on the formulation, it is primarily used to treat hypertension by lowering heart rate and relaxing blood vessels, and is also approved for the treatment of ADHD in children and adolescents, helping improve attention, impulse control, and emotional regulation. Guanfacine should not be stopped abruptly, as sudden discontinuation can cause rebound hypertension with symptoms such as rapid heart rate, anxiety, and tremors. Common side effects include drowsiness, dry mouth, dizziness, and constipation.
Lamotrigine (generic Lamictal) is a prescription anticonvulsant used to treat epilepsy and bipolar disorder. For patients with epilepsy, it helps reduce the frequency of seizures by stabilizing electrical activity in the brain. For those with bipolar disorder, Lamotrigine helps delay mood episodes, particularly depression. It is available by prescription only and should be used under a healthcare providers supervision.
Levetiracetam is a prescription anticonvulsant used to treat seizures in patients with epilepsy. It is approved for use in both adults and children, helping control partial-onset, myoclonic, and tonic-clonic seizures by affecting the brain’s electrical activity. It may be used alone or with other seizure medications as directed by a healthcare provider. Levetiracetam is available by prescription only and should be taken under medical supervision.
Memantine is the generic form of the active ingredient found in Namenda XR. It belongs to a class of medications known as NMDA (N-Methyl-D-Aspartate) receptor antagonists. By modulating the effects of glutamate—a key neurotransmitter in the brain—memantine aids in protecting nerve cells from excessive stimulation that can lead to cell damage.
This regulation of glutamate is crucial because, in Alzheimer’s patients, high levels of this neurotransmitter can cause neuronal damage and exacerbate symptoms of dementia.
Memantine is not a cure for Alzheimer’s disease, but it can improve memory, awareness, and daily functioning in affected individuals. It provides a therapeutic benefit by potentially slowing down the progression of symptoms associated with Alzheimer’s disease.
Note: This medication’s generic and brand-name formulations are used interchangeably throughout this article.
Namenda XR is a prescription medication prominently used in the treatment of cognitive disorders associated with Alzheimer’s disease. It is an extended-release formulation available as capsules and intended for once-daily administration.
The primary active ingredient in Namenda XR is memantine, which addresses symptoms of moderate to severe Alzheimer’s disease by reducing abnormal activity in the brain. This medication helps improve symptoms such as memory loss, confusion, and cognitive decline.
Namenda XR is primarily indicated for the treatment of moderate to severe Alzheimer’s disease. Alzheimer’s is a progressive neurological disorder that impairs memory and cognitive function, significantly affecting an individual’s ability to carry out daily activities.
While Namenda XR does not cure Alzheimer’s disease, it can help manage its symptoms, allowing patients to maintain certain abilities for a longer period and improving their quality of life.
Off-label uses for memantine are being studied, although they require additional clinical validation before being widely recommended. Some potential areas of research include:
While these off-label uses show promise, they have not yet been confirmed as standard treatments and should be considered only after thorough discussion with a healthcare provider.
Namenda XR exerts its therapeutic effects by influencing the neurotransmitter glutamate in the brain. Understanding its mechanism of action and pharmacokinetics is essential to understanding how it contributes to the management of Alzheimer’s symptoms.
Memantine, an NMDA receptor antagonist, selectively blocks NMDA receptors in the brain. NMDA receptors are involved in synaptic plasticity and are crucial for memory and learning. In Alzheimer’s disease, excessive activation of these receptors by glutamate can cause neurotoxicity, leading to cell death and progression of symptoms.
By inhibiting this receptor, memantine helps prevent neuronal overexcitation, thereby reducing neuronal damage. This protective effect can help mitigate the worsening of cognitive symptoms and is pivotal for disease management.
Memantine’s pharmacokinetic profile enables it to be effective in managing symptoms while minimizing fluctuations in blood levels.
Namenda XR is taken once daily, and proper dosing is vital for achieving its intended therapeutic effect. Following dosage recommendations and administration guidelines ensures optimal patient outcomes.
Proper titration is necessary to achieve an effective dose while minimizing potential adverse reactions.
Namenda XR capsules can be taken with or without food, providing flexibility in daily routines. Consistency in dosing timing is beneficial for maintaining steady-state levels.
Adhering to these administration guidelines supports the medication’s efficacy and patient adherence to the treatment regimen.
While Namenda XR is effective in managing Alzheimer’s symptoms, it can be associated with several side effects. Understanding both common and serious side effects helps in managing treatment-related risks effectively.
These common side effects are typically mild and often resolve as the body adjusts to the medication.
Though rare, Namenda XR can cause more significant adverse effects that require medical attention:
Namenda XR is not classified as a high-risk medication, but caution is warranted:
Overall, understanding these side effects and risks promotes safe and effective use of Namenda XR in managing Alzheimer’s disease symptoms.
Drug interactions can impact the efficacy and safety of Namenda XR. Awareness and management of these interactions are essential to avoid potential complications during treatment.
Careful assessment and consultation with a healthcare provider are crucial if Namenda XR is prescribed alongside these medications.
Integration of Namenda XR into a treatment plan should consider these interaction risks to ensure safe and effective therapy.
Administration & Dosage
Namenda XR is typically administered once daily, ideally at the same time each day, to maintain therapeutic levels. It can be taken with or without food, at the patient's preference. Some individuals may choose to consume it at night if drowsiness is a side effect.
The starting dose for Namenda XR is usually 7 mg once daily. This can be gradually increased by 7 mg increments every week, based on patient tolerance and therapeutic response, with a maximum daily dose of 28 mg.
Namenda XR capsules should not be crushed or chewed. They are designed as extended-release formulations that release the active medication gradually over an extended period, ensuring consistent therapeutic effects and reducing the risk of side effects.
Namenda XR is available as extended-release capsules. These capsules are designed to be swallowed whole, allowing controlled release of the medication over time and ensuring steady blood levels throughout the day.
The extended-release design of Namenda XR ensures a gradual release of the medication into the bloodstream. This slow release helps maintain a consistent therapeutic drug level over 24 hours, enhancing its efficacy and reducing potential side effects.
Uses & Mechanism of Action
Namenda XR is primarily used to treat moderate to severe Alzheimer's disease. It helps reduce symptoms associated with the disease and can slow the progression of cognitive decline by modulating neurotransmitter activity in the brain.
Memantine, the active ingredient in Namenda XR, regulates glutamate, a neurotransmitter crucial for brain communication. By modulating excessive glutamate activity, memantine helps protect neurons from degeneration, thereby preserving cognitive functions.
Memantine is not classified as a controlled substance. It is an NMDA receptor antagonist specifically used in the management of Alzheimer's disease. Patients should follow their healthcare provider’s guidance for use.
Memantine acts by protecting neurons from excess glutamate activity, which can harm nerve cells. This modulation aids in preserving cognitive functions and stabilizing symptoms in patients with Alzheimer's disease.
Memantine is typically prescribed for individuals in the moderate to severe stages of Alzheimer's disease. It helps manage symptoms such as confusion and memory loss, which are more pronounced in these stages.
Side Effects & Safety
Common side effects of memantine include dizziness, headache, confusion, and constipation. In some cases, patients may also experience hypertension, fatigue, or drowsiness. It is important to report any bothersome effects to a healthcare provider.
Dizziness is one of the most frequently reported side effects of memantine. Patients experiencing dizziness should take precautions, such as avoiding activities that require alertness until they are familiar with how the drug affects them.
Memantine is generally intended to alleviate the symptoms of Alzheimer's disease and slow its progression. If a patient experiences worsening of condition or adverse reactions, they should consult a healthcare provider immediately for reassessment.
While memantine is not classified as a high-risk medication, it should be used under medical supervision due to its effects on the central nervous system. Regular follow-up and monitoring can help mitigate potential risks.
Some patients may find it beneficial to take memantine at night if it causes drowsiness or fatigue during the day. However, it is essential to discuss the timing of administration with a healthcare provider to optimize treatment.
Interactions & Contraindications
Individuals with a known allergy to memantine or any components of Namenda XR should avoid the medication. Additionally, those with severe renal impairment should use caution and consult with their healthcare provider before starting the medication.
Donepezil and memantine can be used concurrently under a healthcare provider’s guidance. This combination is often used to address different symptoms and enhance the therapeutic management of Alzheimer's disease.
Memantine is not classified as an antipsychotic drug. It belongs to the class of NMDA receptor antagonists and targets the glutamatergic system in the brain to manage Alzheimer's symptoms.
Yes, memantine is considered a psychotropic drug as it acts on the central nervous system, affecting brain function and behavior. It is used specifically for its effects on cognitive symptoms in Alzheimer's disease.
The decision to stop memantine and donepezil should be made by a healthcare provider after evaluating the patient’s condition and the benefits versus risks. Discontinuation usually occurs when the medication no longer provides benefit or when adverse effects outweigh the benefits.
Generic & Alternatives
Generic versions of Namenda XR, containing memantine as the active ingredient, are available. These are as effective as the brand-name version and should be discussed with a healthcare provider.
Memantine HCl is used to manage symptoms of Alzheimer's disease. It helps reduce cognitive decline and behavioral symptoms, improving the quality of life for individuals with moderate to severe Alzheimer's.
Coverage for memantine can vary depending on the specific Medicare plan and any accompanying prescription drug plans. It is advisable to verify coverage details with the plan provider to ensure access to the medication.
Memantine can be substituted with its generic formulations, but patients should consult their healthcare provider to ensure that changes in medication do not affect their treatment plan.
There is no current indication that Namenda XR is being discontinued. Availability may vary by pharmacy and location, so it is advisable to check with local pharmacies or healthcare providers for the latest information.