Ambien is a sedative/hypnotic. It's meant to take right before you turn the lights out. Right when you go to sleep. I too would get the munchies and maybe get up and eat something, HOWEVER, it was before i fell asleep and i remembered everything.
It's been recently proven that 10 mgs is way too strong for women with increased side effects.
I know you are definitely not supposed to drink with it or you could find yourself eating buttered cigarettes. Plus other meds may interact.
It works great for me and I've tried just about everything.