What is the mechanism of lacosamide's effect?

How does lacosamide work in the brain?

Lacosamide’s main pharmacologic effect is a targeted action on sodium channels in nerve cells. It increases slow inactivation of voltage-gated sodium channels, which stabilizes hyperexcitable neuronal activity and reduces abnormal firing that can drive seizures [1].

What does “slow inactivation” mean, and why does it matter?

Voltage-gated sodium channels switch between different inactivation states after they open. Lacosamide preferentially enhances the availability of the “slow inactivated” state rather than simply blocking sodium channels outright. This helps curb excessive neuronal signaling over repeated firing, which is relevant in seizure networks where neurons can become abnormally synchronized [1].

Does lacosamide have other mechanisms besides sodium channel modulation?

The key mechanism tied to its antiseizure effect is its sodium-channel action (slow inactivation). Other effects are not typically described as the primary driver of clinical efficacy in standard summaries of lacosamide’s mechanism [1].

What mechanism-related effects are seen clinically?

Because lacosamide dampens hyperexcitability by stabilizing sodium-channel behavior, it helps prevent the spread of seizure activity across neural circuits rather than directly “stopping” seizures in a single moment [1].

Source

[1] https://www.drugbank.com/drugs/DB06640