Det vides endnu ikke helt præcist, hvordan lacosamid virker, men stoffet synes at reducere aktiviteten i natriumkanalerne (porer på overfladen af nervecellerne), der gør det muligt at overføre 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.