The risk is more to do with giving an epidural
because there is risk of hemorrage at the epidural
site. I don't know about any meds to counteract the anti-coagulant and I'm sure that c-section would certainly impose a greater bleed risk, however, I remember during my last c-section the docs were SO careful and cauterized (if that is the proper term to use?) each and every single little bleed they saw...I think they were more over-cautious than I was at that time.