- Levonorgestrel is available as a blister pack containing two 0.75 mg tablets
- Plan B One-Step, Next Choice One Dose, My Way are available as a blister pack containing one 1.5 mg tablet
STORAGE: Levonorgestrel should be stored at room temperature between 15 C and 30 C (59 F and 86 F).
DRUG CLASS AND MECHANISM:
- Levonorgestrel (Plan B) is emergency contraception (commonly called the morning after pill) that is used as backup contraception to prevent pregnancy when taken within 72 hours after unprotected sex or when birth control fails.
- Levonorgestrel is a progestin. Progestins are hormones used in many birth control pills. Although levonorgestrel and similar emergency contraception pills contain a higher dose of levonorgestrel than birth control pills, they work in a similar way to prevent pregnancy, mainly by stopping the release of an egg from the ovary. Additionally, levonorgestrel also may prevent fertilization of an egg (the uniting of the sperm with the egg) or prevent the attachment (implantation) of a fertilized egg to the uterus (womb).
- Emergency contraception pills do not work in women who are already pregnant and should not be taken during pregnancy.
- The FDA approved levonorgestrel in July 1999.
REFERENCE: FDA Prescribing Information
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