Mifepristone: Efficacy
Glasier, et al, 1992
800 women and adolescents
Single 600 mg dose given within 72 hours of unprotected
coitus was 100% effective
WHO 1999
1,700 women
10 mg and 50 mg mifepristone equal in efficacy to 600 mg
dose (85% decrease in number of pregnancies estimated
to occur without treatment)
Effective up to 5 days after unprotected sex
Glasier A, et al. N Engl J Med. 1992;327(15):1041-1044.
Task Force on Postovulatory Methods of Fertility Regulation.
Lancet. 1999;353:697-702.