This pill is not RU-486 which is destructive. Are you against all birth control pills?
As pointed out by many people on this thread, Plan B works in three ways, as admitted to on its on dedicated website. It prevents ovulation, when an egg is released from the ovary. It prevents fertilization, so an embryo isn't created in the first place. That is the "contraceptive" part. Finally, it works by preventing an embryo from implanting in the uterus, therefore causing a very early-term abortion.
If this is the position the president and his administration is taking, it is completely inconsistent with his veto of embryonic stem cell research. If he truly believes, as he said, that destroying embroys for research "manipulate[s] human life and violate[s] human dignity," then he should oppose the over-the-counter availability of Plan B, plain and simple.
I am against any "contraceptive" that acts as an abortaficiant. The pill does create a hostile environment within the womb which causes a miscarriage. Most hormonal contraceptives do not prevent conception in every case, and they make sure to cause an abortion if a child is conceived by mistake. This ends a newly created human life and is morally unacceptable to me.
RU 486 destroys a normally progressing preganancy, whereas the pill never allows the pregnancy to develop normally.
Both destroy human life.