| Plan B® is the brand name for progestin-only emergency contraceptive pills (ECPs) that have been approved by the U.S. Food and Drug Administration (FDA). The other FDA-approved ECPs are increased doses of certain other oral contraceptives that contain both progestin and estrogen.
Some women experience side effects with ECPs, including nausea, vomiting, fatigue, headache, dizziness, breast tenderness, and menstrual changes. However, these side effects occur less frequently with progestin-only pills, such as Plan B, than they do with other ECPs.
Emergency contraception, if started within 120 hours of unprotected intercourse, can significantly reduce the risk of pregnancy. Emergency contraception is the best way to reduce the risk of unintended pregnancy in cases of rape, incest, or contraceptive failure.
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