Det vides endnu ikke nøjagtigt, hvordan lacosamid virker, men det menes at nedsætte natriumkanalernes (porer på nervecellernes overflade) aktivitet, hvilket gør det muligt at sende elektriske impulser mellem nerveceller.
The exact way in which lacosamide works is still unclear, but it seems to reduce the activity of sodium channels (pores on the surface of nerve cells) that allow electrical impulses to be transmitted between nerve cells.