RU-486 The New Abortion Pill: How Safe Is It? RU-486 is an abortion pill. This pill is a steroid hormone similar to the natural hormone progesterone. It is an antiprogestrone drug that blocks receptors of progesterone, a key hormone in order to start and maintain a human pregnancy. RU-486 is made up of Mifeprisone (a.k.a. RU-486) and also taken with this, is Prostaglandin’s to induce uterine contractions. It acts just like Methrexate and Misoprostal when these two are combined also induce a contraction. Methrexate is used to combat cancer and rheumatoid arthritis. Misprostal is prescribed to prevent ulcers ca....

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