The abortion pill is about 98% effective. It is the most effective way to end an early pregnancy. Medication abortion has proven to be a safe and non-invasive method of termination of pregnancy. The most common safe abortion pills are mifepristone and misoprostol. They are taken in a combination, first mifepristone and then misoprostol for safe and discreet abortion care. Medical abortion success rate also depends on how you have taken the abortion pills. If you have followed the proper instructions and took the correct abortion pill dosage, then you will definitely get a successful medication abortion.