Hi Daisy!
First let me say, it can take up to six weeks to see if a preventive medication is working for you.
The anti-seizure medication can be one of many:
carbamazepine, aka Tegretol
clonazepam, Klonopin
clorazepate, aka Tranxene
divalproex, aka Depakote
gabapentin, aka Neurontin
levetiracetam, Keppra
lamotrigine, aka Lamictal
pregabalin, aka Lyrica
oxcarbazepine, Trileptal
tiagabine, aka Gabitril
topiramate, aka Topamax
valproate Sodium, aka Depacon
zonisamide, aka Zonegran
For a full list of preventive medications, see: Migraine Preventives: Too Many Options to Give Up!
Good Luck on the new medication!