How long does it take for Mifeprex to be effective for contraception?

Patient's question:

No

Doctor's answer:

Each Mifeprex tablet contains 0.15 mg of the progestogen--drosperinone and 0.03 mg of estrogen. Start taking the first tablet on the first day of your menstrual period, take one tablet daily, and continue for 21 days. Then, stop taking the medication for 7 days, and begin the second cycle of medication. After childbirth, you can start taking the medication on the first day of your first menstrual period after delivery.