I had 3 ablations done in thoracic spine, the same day, same time, with no sedation for broken ribs that were slipping. It hurt just like the epidural lumbar injections I've had, but with the local anesthetic it was tolerable for me, and I'm pretty sensitive from fibromyalgia.
I wouldn't get in a tizzy over these injections. You're supposed to have a driver in case you get some weakness or dizziness. Just go home and follow the doc's directions about icing and resting the rest of the day.