Phenobarbital used in a sentence

Phenobarbital in a sentence as a noun

I'd venture that it's because "he said that he's learned to identify the signs of grand mal seizures, and if he feels one coming on, he simply sticks himself with a couple hundred milligrams of phenobarbital, straps himself in, and goes for a ride.

Why and how am I still the same person in the morning than I was when I fell asleep?One could argue that the abundant neural activity that happens during the night preservres yourself...What about deep phenobarbital-induced general anesthesia, which induces a flat EEG?