Overview
It's a controlled substance with low misuse risk. It has few drug interactions.
What it's used for
- Partial (focal) seizures
- Generalized tonic-clonic seizures (with other medicines)
How to take it
- Take it twice a day, with or without food.
- Don't stop suddenly.
Your dose depends on your health and other medicines. Always follow your prescription label, and ask your pharmacist if anything is unclear.
Side effects
Common side effects
- Dizziness
- Double vision
- Headache
- Nausea
Warnings
- It can affect heart rhythm, especially with heart conduction problems.
Other medicines, foods, and alcohol
- Other medicines that slow heart conduction add to that risk.
Tell your provider and pharmacist about every medicine, vitamin, and supplement you take.
Pregnancy and breastfeeding
Talk with your provider; don't stop on your own.
Missed doses, overdose, and storage
If you miss a dose
Take it as soon as you remember, unless it's almost time for your next dose. Then skip the missed dose. Don't take two doses at once.
If someone takes too much
Call Poison Control at 1-800-222-1222 or get help online at poison.org. Call 911 if the person collapses, has a seizure, has trouble breathing, or can't be woken.
Storing it
Store at room temperature, away from heat and moisture (not in the bathroom), and out of reach of children and pets.
Conditions it's used for
Sources
- DailyMed: FDA drug label for Lacosamide (U.S. National Library of Medicine)
- MedlinePlus: Drugs, herbs, and supplements
- FDA: Drugs@FDA
Last updated 2026-11-13.