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Lacosamide

Lacosamide 100MG

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What is Lacosamide?

Lacosamide is a medication used to help control certain types of seizures, specifically partial onset seizures and primary generalized tonic-clonic seizures. It works by reducing abnormal electrical activity in the brain.

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What is Lacosamide ?

Lacosamide is a medication used to help control certain types of seizures, specifically partial onset seizures and primary generalized tonic-clonic seizures. It works by reducing abnormal electrical activity in the brain.

Source: MedlinePlus, U.S. National Library of Medicine

  • Lightheadedness, dizziness, fainting
  • Fever, chills, cough, sore throat, swollen, painful, or tender lymph glands in your neck, armpit, or groin
  • Trouble breathing, fainting
  • Fast, slow, pounding, or uneven heartbeat
  • Allergic reaction: Itching or hives, swelling in your face or hands, swelling or tingling in your mouth or throat, chest tightness, trouble breathing
  • Bloody or cloudy urine, rapid weight gain, swelling of your face, feet, or lower legs
  • Dark urine or pale stools, nausea, vomiting, loss of appetite, stomach pain, yellow skin or eyes
  • Depression, unusual changes in mood or behavior, thoughts of hurting yourself
  • Problems with walking or balance, sleepiness, blurred or double vision
  • Keep all medicine out of the reach of children. Never share your medicine with anyone.
  • Keep all medicine out of the reach of children. Never share your medicine with anyone.
  • Tell your doctor if you are pregnant, or if you have kidney disease, liver disease, nerve problem caused by diabetes, heart or blood vessel disease, or heart rhythm problems. Tell your doctor if you have phenylketonuria (PKU) or a history of depression or mental health problems or drug or alcohol abuse.
  • Tell your doctor if you are breastfeeding or plan to breastfeed. This medicine may cause your baby to be more sleepy. Talk with your doctor if you have concerns.
  • This medicine may cause the following problems: Changes in mood or behavior, including thoughts of suicideHeart rhythm problems (including PR prolongation)Drug reaction with eosinophilia and systemic symptoms (DRESS), which may involve multiple organs, including your liver or kidneys
  • This medicine may make you dizzy or drowsy, or cause double vision. Do not drive or do anything else that could be dangerous until you know how this medicine affects you.
  • This medicine can be habit-forming. Do not use more than your prescribed dose. Call your doctor if you think your medicine is not working.
  • Do not stop using this medicine suddenly. Your doctor will need to slowly decrease your dose before you stop it completely. Your seizures may return or occur more often if you stop this medicine suddenly.
  • Your doctor will do lab tests at regular visits to check on the effects of this medicine. Keep all appointments.
Is lacosamide the same as Vimpat?
Yes. Lacosamide is the generic name for the active ingredient in Vimpat (and Motpoly XR). Generic lacosamide contains the same active drug as brand-name Vimpat and is FDA-approved for the same seizure uses, usually at a lower cost.
Is lacosamide a controlled substance?
Yes. Lacosamide is a Schedule V (C-V) controlled substance, the lowest federal control category. This means it has a recognized medical use with a low potential for misuse, but pharmacies still handle and dispense it under controlled-substance rules.
What are the most common side effects of lacosamide?
The most common side effects are dizziness, double vision (diplopia), problems with coordination or balance (ataxia), and drowsiness. These can affect your ability to drive. Lacosamide can also affect heart rhythm and, rarely, cause a serious hypersensitivity reaction called DRESS. Contact your provider about any side effects that concern you.
Is there a generic version of Vimpat available?
Yes. A generic version of Vimpat, called lacosamide, is available. It contains the same active ingredient and is typically less expensive than the brand. Prices still vary by pharmacy, so enter your ZIP above to compare and find a lower price near you.
Can you stop taking lacosamide suddenly?
No. You should not stop lacosamide abruptly, because doing so can increase the frequency of seizures. If you and your provider decide to stop it, the dose is tapered down gradually. Always follow your prescriber's instructions before changing or stopping this medication.
How much does Lacosamide cost without insurance?
The price of Lacosamide without insurance varies by pharmacy, dosage, and quantity. Rx.com compares cash prices at more than 60,000 US pharmacies so you can find the lowest price near you. Many people save up to 98% off retail prices with a free Rx.com coupon.
What are the common side effects of Lacosamide?
Common side effects of Lacosamide may include: Lightheadedness, dizziness, fainting, Fever, chills, cough, sore throat, swollen, painful, or tender lymph glands in your neck, armpit, or groin, Trouble breathing, fainting, Fast, slow, pounding, or uneven heartbeat, Allergic reaction: Itching or hives, swelling in your face or hands, swelling or tingling in your mouth or throat, chest tightness, trouble breathing. This is not a complete list — consult your pharmacist or doctor for full side effect information.
Is there a generic version of Lacosamide?
Generic versions may be available for Lacosamide. Generics contain the same active ingredients as brand-name drugs and are typically 80–90% cheaper. Search Lacosamide on Rx.com to compare generic and brand prices at pharmacies near you.
What is the cheapest pharmacy for Lacosamide?
The cheapest pharmacy for Lacosamide depends on your location and dosage. Rx.com compares prices at CVS, Walgreens, Walmart, Kroger, Costco, and thousands of independent pharmacies. Enter your ZIP code on Rx.com to find the lowest price for Lacosamide near you.

Lacosamide Coupons & Prices

Lacosamide 100MG

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Lacosamide Tablet — prescription drug image
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Lacosamide 100mg (28)
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Compounded GLP-1 medications are not FDA-approved and are prepared by state-licensed compounding pharmacies. They are not affiliated with, endorsed by, or equivalent to any brand-name medication or manufacturer. Prescription required; eligibility is determined by a licensed provider. Prices are estimates and may vary.

Looking for a lacosamide coupon? Lacosamide is the low-cost generic version of Vimpat, an anti-seizure medicine, and because it is a generic you often pay far less than the brand. Cash prices still vary widely from one pharmacy to the next, so comparing matters. Rx.com checks prices across more than 60,000 pharmacies so you can find a better price near you. Enter your ZIP above to see today's lacosamide price and print or show a free coupon at the pharmacy counter.

What is lacosamide and how does it work?

Lacosamide is an anticonvulsant (antiepileptic) medication and the active ingredient in the brand-name drugs Vimpat and Motpoly XR. It is a functionalized amino acid that works by enhancing the slow inactivation of voltage-gated sodium channels in the brain, which helps calm the excessive nerve signaling that leads to seizures.

It is FDA-approved to treat partial-onset (focal) seizures in patients 1 month of age and older, and as an add-on therapy for primary generalized tonic-clonic seizures in patients 4 years and older. Lacosamide comes as oral tablets, an oral solution, extended-release capsules (Motpoly XR), and an IV injection given in medical settings. It is sometimes used off-label for nerve pain, but that is not an FDA-approved use. Your prescriber decides which form and dose is right for you.

Lacosamide cost and coupons without insurance

Because a generic version of lacosamide is available, it is typically much less expensive than brand-name Vimpat. That said, cash prices are not the same everywhere. The exact same prescription can cost noticeably more at one pharmacy than at another down the street, which is why it pays to compare before you fill.

Rx.com compares live lacosamide prices across more than 60,000 U.S. pharmacies so you can find a lower cash price near you, no insurance required. Enter your ZIP above to see today's price and get a free coupon. The manufacturer of Vimpat (UCB) also offers a savings program for the brand; eligibility and terms vary, so check the official page at ucb-usa.com/Patients/Financial-Assistance for current details.

Lacosamide alternatives and related medications

Lacosamide is one of several anti-seizure medicines. Whether an alternative is appropriate depends on your seizure type, other conditions, and how you respond, so any change should be made with your prescriber. Other antiepileptics people ask about include:

You can look up any of these on Rx.com to compare prices across pharmacies. Do not switch or stop a seizure medicine on your own.

Lacosamide safety and side effects

Lacosamide has no boxed warning, but there are important things to know. Like all antiepileptic drugs, it carries a class warning for a small increased risk of suicidal thoughts or behavior (about 1 in 500); tell your provider about any new mood changes. Common side effects include dizziness, double vision (diplopia), coordination problems (ataxia), and drowsiness, which can affect driving until you know how the medicine affects you. Lacosamide can also cause dose-dependent heart-rhythm effects such as PR-interval prolongation, AV block, atrial fibrillation or flutter, slow heart rate, and fainting, so use caution if you have a heart conduction problem or take other drugs that affect heart rhythm.

A rare but serious multiorgan hypersensitivity reaction known as DRESS can occur; seek care for a rash with fever or swollen glands. Do not stop lacosamide abruptly, as this can increase seizures; your provider will taper it gradually. Dose adjustments are needed for liver problems and severe kidney impairment. This is general information, not medical advice; talk with your doctor or pharmacist about your specific situation.

Sources & accuracy

This Lacosamide information was written and reviewed against authoritative U.S. medical sources — MedlinePlus (U.S. National Library of Medicine), DailyMed, and FDA prescribing information — and checked for accuracy. It is provided for education and is not a substitute for professional medical advice.

Verify the official label: Lacosamide on DailyMed (FDA)

Reviewed against FDA labeling · Last reviewed July 2026

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Medical disclaimer: This information is provided for general educational purposes only and is not medical advice. It is not a substitute for professional diagnosis or treatment. Always consult a licensed physician, pharmacist, or other qualified healthcare provider before starting, stopping, or changing any medication or treatment. Never disregard professional medical advice or delay seeking it because of something you read here. If you think you may have a medical emergency, call your doctor or 911 immediately.


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