I agree with the dog, service dogs are trained to detect seizures (sometimes right before they happen - not sure how, but yeah). Anyways, the dog would go and either stay by their "patient" or go and get assistance. I know they are a lot of money (15-30K depending), but they usually have sponsors to assist paying and then the company assists with fund raising like "Go fund me" , The money sounds like a lot but it covers a lot and includes on going training usually.

I know this isn't exactly what you're asking, but a dog can be trained to do that.