The general drug abortion is through the taking of mifepristone and misoprostol tablets to complete the abortion, taking mifepristone tablets is mainly to play a role in killing the embryo, so it will not cause abdominal pain. Taking Misoprostol tablets is mainly to promote the discharge of the embryo, this situation is prone to abdominal pain, after eating Misoprostol sensitive women will soon appear abdominal pain, not sensitive often need a few hours before abdominal pain, generally more than an hour will appear more obvious abdominal pain. Abdominal pain is mainly due to uterine contractions to promote the expulsion of embryonic tissue, how long the pain will be depends on the process of the expulsion of the fetus, some women are very sensitive to the medication and expel the fetus in an hour or so, and the pain may last for just over an hour. But some people are not sensitive, the time to expel the fetus is up to a few hours, it is necessary to pain for several hours long, followed by the contraction of the uterus bouts of pain.