system
Given the following post, respond as if you're commenting on Reddit:
human
Eli5: How do anti-seizure meds work?

Am epileptic so curious as to what they do to my brain.
gpt
Depends which one you are referring to! As a very general statement- they can inhibit the markers that cause your nerves to communicate across the nervous system. Therefore less transmission between nerves. Less seizures :)  

This is why drowsiness is a common side effect with these meds- as it is slowing down the firing of your nerves :)