My partner and his one yearly tonic clinic seizure..

Hi All Wondering if anyone is in a similar situation. My partner has had one seizure a year since I've known him. They have all been after big nights on the booze. Since figuring this out he has stopped drinking to excess and over the past year has been seizure free. But almost on year on the dot of the last one , being tired, stressed and dehydrated he has another. He hasn't had a drink all month because we are doing "dry July" so seemingly not just booze related. The drs have now put him on Keppra and he's essentially changed into a zombie overnight. While we understand there is potential for more than one seizure a year, it seems excessive to be put on 1000mg pills when history shows he has them once a year. Reading on here I see there are different types and they suit different people in different ways. But does anyone know of any other option than the meds? Or know someone who has only ever had one singular seizure a year? I think they have all been tonic clonic and typically we don't end up in hospital (until the most recent one). He's basically feeling like the chance of him having another one is so slim that there must be another alternative. Especially because hours before a seizure he shows signs that one is coming. Is there something he can take at that point instead of continuously taking meds? Any suggestions medical or alternative appreciated :) Thanks in advance!