The “morning after pill” is a large dose of oral contraceptive. Known as Plan B, the pill is actually 2 tablets, one taken within 72 hours of intercourse and the second 12 hours later. It is NOT the same as RU-486.

Plan B is believed to act as an emergency contraceptive principally by preventing ovulation or fertilization. In addition, it may inhibit implantation. It is not effective once the process of implantation has begun. Things to consider:

• Emergency contraception is not effective if a woman is already pregnant.
• Plan B does not protect against HIV infection (AIDS) and other sexually transmitted diseases.
• The most common side effects in the Plan B clinical trial were nausea, abdominal pain, fatigue, headache, and menstrual changes.
• The manufacturer warns that Plan B is not recommended for routine use as a contraceptive.

RU-486, also known as “the abortion pill,” is actually a combination of two drugs — mifepristone and misoprostol — that cause early abortion. It should not be used if it has been more than 7 weeks since your last period. It is NOT the same as the “morning after pill.” How does it work? The first pill, mifepristone, is taken orally and blocks the hormone progesterone needed to maintain the pregnancy. The second pill, misoprostol, is inserted into the vagina 24 to 72 hours later, causing the uterus to contract and expel the placenta and embryo.

• An RU-486 abortion requires 3 visits to a health care provider.
• Most medical abortions using mifepristone are completed within 2 weeks, but some can take up to 3 or even 4 weeks.
• Side effects include heavy bleeding, headache, diarrhea, nausea, vomiting, and cramping.
• If this method fails, a surgical abortion will be required.