Reply #37: NOT QUITE.... you have to take the right combo of the right pills.

[Lisa0825]

There is a large chart on this page showing the right dosages of many common BC brands.

http://www.plannedparenthood.org/birth-control-pregnancy/emergency-contraception/procedure-4366.htm

How to Take

Plan B and other progestin-only pills can be taken in one dose or in two doses, 12 hours apart. Combination hormone pills must be taken in two doses, 12 hours apart. The number of pills in a dose varies with the brand of the pill. Use the same brand for both doses.
Swallow the pills in the first dose as soon as possible, up to 120 hours — five days — after having unprotected sex. EC may cause nausea and vomiting. This risk is much higher for combination pills than for progestin-only pills. To reduce the risk of nausea, you may want to take an anti-nausea medication, such as Dramamine ® or Bonine®, one hour before taking EC.

If you are taking the pills in two doses, swallow the second dose 12 hours after taking the first dose. If you threw up after the first dose, be sure to use an anti-nausea medication one hour before taking the second dose. Or you may want to take the second dose as a vaginal suppository by inserting the pills with your fingers as high into the vagina as you can reach. (The medication will be absorbed through the vaginal tissue.)

If you vomit the second dose, do not take any extra pills. They probably won't reduce the risk of pregnancy. But they will probably make you sick to your stomach.