"Tranquilizers were developed for medical purposes, when a dog or horse needs sedation for treatment," he said.

Some need sedation; a few require long-term treatment.

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

Such patients may need sedation to ease their distress.

However, some patients may need sedation and the very anxious/agitated patient may even need a general anesthetic.

Pulse dye laser treatment does not need conscious sedation nor local anesthetic.

Others need sedation at least half the time.

"Well enough not to need sedation, I'd say."

Patients accustomed to having the pain of dental procedures effectively deadened with local anesthetics may not need sedation.

The patient needs general anesthesia or conscious sedation for the duration of the procedure and is in a lithotomy position.