Hi I am also on Efexor XR (150mg). I am 3 weeks out right now, and I have been taking them all along. Doc knew, and the night after my surgery when I was in hospital the nurse gave it to me by emptying the capsule into one of those medicine measures (tasted horrible like the inside of a beanbag). Anyway I am still taking it now, in capsule form, along with other medications, with no problems.
I cant go even one day without it or I get those horrible zaps.
Good luck