<prompt> What is the dose of mifepristone in Medical aboion?600 mg200 mg400 mg100 mg  <response>: Dose used for medical aboion: 600 mg single dose to be taken within 72 hours Mifepristone: 10 mg single dose is used as an emergency contraceptive. Mifepristone is selective progesterone receptor modulator SPRM. ACTS as antagonist of progesterone receptors in uterus Antagonist to glucocoicoid receptors Antagonist to androgen receptors. 