Plan B
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The emergency contraceptive pill (ECP), or the “morning-after pill,” is a method of birth control used after unprotected sex or a failure of another birth control method (i.e., condom breaking).
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Emergency contraceptive pills prevent pregnancy by preventing or delaying ovulation so there is no egg or ovum for sperm to fertilize. It consists of one pill containing 1.5mg of Levonorgestrel, a type of progestin. ECPs do not induce an abortion. For differences between ECPs and the Abortion Pill, see this post.
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ECPs are available at most pharmacies without a prescription. It costs $30-$40.
How to use it
ECPs are most effective within 72 hours (3 days) of having unprotected sex (about 88% effective in preventing pregnancy)
The effectiveness drops to 50% taken 3-5 days after unprotected sex.
Take the pill by mouth with or without food. If you vomit within 2 hours, you may need another dose.
If you weigh over 165 pounds, levonorgestrel ECPs are less effective. Ella is effective up to 195 pounds, and copper IUDs are effective at any weight. Doubling your dose is not effective.
Your period might be later after taking an ECP. If you do not menstruate after three weeks after taking the pill, take a pregnancy test.