A condition in which real or imagined fears are difficult to control is called Anxiety disorder.
The medicine for epilepsy is medications, surgery, dietary changes/therapies, and devices.
Some Medicines are:
Carbamazepine
Diazepam
Topiramate
Lamotrigine
Oxcarbazepine
Appetite is not linked to hunger since appetite is the activity and drive in order to eat whereas hunger is the physical and mental state in which a person needs to eat.
Also appetite is linked to many unhealthy behaviors that can result to other symptoms of eating disorders which causes deletrious effects on one's mental and biological state.