fosphenytoin

[ fos-fen-i-toh-in, -fuh-nit-oh-in ]
/ ˌfɒs fɛn ɪˈtoʊ ɪn, -fəˈnɪt oʊ ɪn /

noun Pharmacology.

a prodrug that produces phenytoin and is taken to prevent or treat seizures.