I took a half a codiene tablet before going in and with the novocaine on top, I didn't feel a thing except for sweet, sweet relief when it was all over.posted by contessa at 5:09 AM on November 18, 2004 And, oh yeah, if you are getting a root canal you are probably going to need a crown as well, and that whole deal takes a few visits and (as you have probably guessed) is also really expensive.posted