No, this is not the same as the morning after pill. The morning after pill is similar to regular birth control except it has large doses of hormones. I dont think you would want that.
bromo and dostinex do not block progesterone, they block prolactin.
ru486 blocks progesterone. But I believe it also blocks cortisol which you would think would be a good thing. But to much of a good thing sometimes is not good.
I believe this is the problem that Manny faced when it tried. Maybe he will chime in.