IPA: /ˌæn.tiˈsiː.ʒər/
KK: /ˌæntiˈsiːʒər/
Intended to prevent or lessen the occurrence of seizures.
The doctor prescribed an antiseizure medication to help manage the patient's condition.
Antiseizure is formed from "anti-" (meaning against) and "seizure" (from Latin "seizure" meaning to take or capture). The word refers to something that works against or prevents seizures.
Think of 'against' ('anti-') something that 'takes over' ('seizure') — that's why antiseizure means something that prevents seizures.
No commonly confused words.