My 63 Year Old Male Hunting Buddy Who I Deer

My 63 year old male hunting buddy who I deer and pheasant hunt with had a grand mal seizure. He has had heart attacks but is doing better with exercise, diet, and medication. As far as epilepsy I had never known he had an issue. I'm a bit nervous about going out hunting or asking him to go if his health is at risk. The Heart stuff i think he has a handle on. How long do you expect to recover and rest after a seizure?