The Vegan Society UK provides this statement about medicines:
The Vegan Society DOES NOT recommend you avoid medication prescribed to you by your doctor. [...]
What you can do is ask your GP or pharmacist to provide you, if possible, with medication that does not contain animal products such as gelatine or lactose.
Asking your pharmacist for gelatine-free ...
Im not medical expert, also new in this area but but you can check:
I can add few words tomorrow if you are interested
As seizures - they may often come from past external enviroment (bad past, like war ...