You can sleep, they encourage it actually. You can sleep all day, and then again all night. It's easy when your so exhausted. They'll give you drug after drug and with each one you fade out even more. You stay tucked under your giant blanket, and make sure that your hand is propped up so the tube won't hurt under your skin.
When the peppy nurse walks in holding a vile full of clear liquid, you roll your eyes. Just imagine the slick fluid quickly over taking every part of you. You fade, and drift, and slide, and fall, and fade. But you don't dream.