The first solution to pop into my mind was, of course, heavy sedation.

She's been sound asleep for the past two hours under heavy sedation.

He was like an automaton or a patient under heavy sedation.

The man's badly injured and will need heavy sedation before he can be moved.

Under heavy sedation he eventually recovered, and told them what had happened.

She was present, under heavy sedation, at the funeral of her daughter on 7 August 1987.

Workers for the lunar mines could make the trip under heavy sedation.

Many procedures can be performed on the standing horse with heavy sedation alone.

They're under heavy sedation, may be hours before they come to.

After that, he was reported to be in a critical condition, unable to communicate and under heavy sedation.