The FDA approved MTP Kit regimen includes mifepristone and misoprostol. This is a highly effective process when completed within 10 weeks (70 days) with a 98% success rate. It is often sold in a kit called the MTP kit. This is the go-to kit for anyone looking to follow the FDA The process is as follows: First, you take 1 Mifepristone tablet with water. It blocks progesterone, required to maintain the pregnancy, uterine lining breaks down, ending the pregnancy Misoprostol Taken 24-48 hours later, after mifeprestone, which is needed to continue a pregnancy, causes the uterus to contract and expel the products of conception.