Only two wisdom teeth ever even appeared in my mouth, and they weren't impacted, but for whatever reason, I had general anesthesia anyway.
Then I took codeine at home until it made me jittery, at which time I stopped taking it. I had no pain before the surgery and very little pain after.
However, one of my molars was pushed
sideways by the emerging wisdom tooth on that side, so I guess it had to come out!