I do obs/gyn. We give a few things to them when they come in after the incident. We do all the path work first (rape kit, bHCG, etc...). Why bHCG you say? Because it's happened before that a woman has been raped, but has been pregnant as well (only a few weeks normally). Then we give her the option of having a morning after pill. RU-486 is unavailable in Australia at the present time. Most do take it in my experience. Then, they get other things for STD's... Azithromycin single dose normally and the option of a course of anti-retrovirals. Then we hand them to social work and talk to the cops then. Normally they also get 3,6,12 month appointments with us and social work afterwards for HIV/HepC and social work stuff.
IMHO, the morning after pill is the treatment of choice in cases like this, NOT RU-486.