Plan B, Morning after pill, Side effects, Dosage, and Interactions | Omudhome Ogbru, PharmD | RxEconsult

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Plan B (morning after pill) Uses, Side Effects, Dosage Category: Women's Health by - October 1, 2011 | Views: 9141 | Likes: 0 | Comment: 1  

Plan B | levonorgestrel

Medication Class: Progestin Contraceptive
Manufacturer: Duramed Pharmaceuticals
Approval date: July 1999

What is Plan B and how does it work

Plan B (morning after pill) is a progestin only birth control pill that works by preventing ovulation or fertilization. It does not work if a woman is already pregnant.

What is Plan B used for

Plan B is an emergency contraceptive. It is used following unprotected intercourse or if the primary method of birth control fails.

How Effective is Plan B

  • Plan B (One Step) prevented 84% of unwanted pregnancies in women who required emergency contraception.
  • Plan B (One Step) reduced the expected pregnancy rate from 8% to 1% compared to no contraception.

What are interesting facts about Plan B

  • It is available over the counter.
  • It is a back up birth control method when other methods fail.

What  is the dosage of Plan B

  • Plan B (One Step): One tablet (1.5 mg) orally as soon as possible within 72 hours after unprotected intercourse or failure of primary birth control method.
  • Plan B (Next Choice): One tablet (0.75 mg) orally as soon as possible within 72 hours after unprotected intercourse or failure of birth control. Then 1 tablet 12 hours later.

What are the side effects of Plan B

Common: Headache, heavier menstrual bleeding, nausea, lower abdominal pain, fatigue, and dizziness

Serious: none were reported
Plan B drug interactions
St. John’s wort
HIV protease inhibitors (e.g., Norvir)

What is the cost of Plan B

$22.85 to $50.77 per tablet

References: Plan B FDA Prescribing Information

Last Updated: 7/2013

This medication summary is for information only and is not a substitute for medical advice, diagnosis or treatment provided by a qualified health care provider.


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