I had one with DD, once it wore off I felt fine, no sore back or anything and recovery was all fine.
I can't remember how long it took to wear off.
I did have trouble pushing DD out, I don't know for sure if it was because of the epi, she hadn't dropped down far enough so there was extra pushing needed to get her further down plus mixed with exhaustion. The epi could have played a part in the fact I couldn't get up out of bed to help gravity assist getting her down and then suction was required to get her out.