levonorgestrel (Plan B, Plan B One-Step)

  • Pharmacy Author:
    Omudhome Ogbru, PharmD

    Dr. Ogbru received his Doctorate in Pharmacy from the University of the Pacific School of Pharmacy in 1995. He completed a Pharmacy Practice Residency at the University of Arizona/University Medical Center in 1996. He was a Professor of Pharmacy Practice and a Regional Clerkship Coordinator for the University of the Pacific School of Pharmacy from 1996-99.

  • Medical and Pharmacy Editor: Jay W. Marks, MD
    Jay W. Marks, MD

    Jay W. Marks, MD

    Jay W. Marks, MD, is a board-certified internist and gastroenterologist. He graduated from Yale University School of Medicine and trained in internal medicine and gastroenterology at UCLA/Cedars-Sinai Medical Center in Los Angeles.

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SIDE EFFECTS:

Side effects include:

PRESCRIPTION: No. Most emergency contraception pills can be purchased over-the-counter or OTC (without a prescription). However, some age restrictions may apply.

GENERIC AVAILABLE: Yes

PREPARATIONS:

  • Levonorgestrel is available as a blister pack containing two 0.75 mg tablets
  • Plan B One-Step is available as a blister pack containing one 0.75 mg tablet

STORAGE: Levonorgestrel should be stored at room temperature between 15 C and 30 C (59 F and 86 F).

DOSING: Emergency contraception pills should be taken as soon as possible and not more than 72 hours after unprotected sex or when birth control fails.

  • Single dose regimen: Take one 1.5 mg tablet as soon as possible within 72 hours of unprotected sex or when birth control fails.
  • Two-dose regimen: Take one 0.75 mg tablet as soon as possible within 72 hours of unprotected sex or when birth control fails, followed by a second 0.75 mg tablet 12 hours later.

DRUG INTERACTIONS: Drugs or herbal products that increase the activity certain liver enzymes that breakdown drugs may reduce blood levels of levonorgestrel and the effectiveness of the morning after pill.

PREGNANCY: Emergency contraception pills will not work if you are already pregnant and should not be used during pregnancy.

NURSING MOTHERS: Levonorgestrel is thought to enter human milk after oral administration and should be used cautiously in nursing mothers.

REFERENCE: FDA Prescribing Information

Medically Reviewed by a Doctor on 9/15/2015
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