Plan B: Risk of Pregnancy?

Plan B can be initiated up to 5 days (120) hours after unprotected intercourse or contraceptive failure.

Side effects:
* Nausea and vomiting – although the risk for this is much lower with progestin-only EC (versus combination EC). Nausea occurs approximately 23% of the time while vomiting happens in approximately 6% of progestin-only EC users.

* A woman may experience breast tenderness due to EC

* Dizziness and/or headaches are also common

* EC may change the amount, duration, and/or timing of a female’s next period about 10-15% of the time. This side effect is typically minor, and menstruation will usually occur a few days earlier or later than anticipated.

* Frequent use of EC may cause periods to become irregular and unpredictable.

* Emergency contraception, like other contraceptives, may decrease the risk of ectopic pregnancy. However, to be cautious, a woman should inform her healthcare provider that she had taken emergency contraception should she become pregnant following its use, so her doctor can test for the existence of an ectopic pregnancy.

Plan B is most effective the sooner it is started. Studies have shown that a single administration of two full doses of Plan B EC is just as effective as taking 2 doses, 12 hours apart.

If started within 72 hours of unprotected intercourse, Plan B reduces the risk of pregnancy by 89%. Of every 100 women who use this method, only 1 woman will become pregnant.

Plan B EC will not continue to prevent pregnancy during the rest of a woman’s cycle, so additional contraceptive methods should be used.
everything that I've read says if she didn't take the second dose, she needs another dose