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
bosentan
carbamazepine
St. John’s wort
HIV protease inhibitors (e.g., Norvir)
Barbiturates
HIV protease inhibitors (e.g., Norvir)
Barbiturates
What is the cost of Plan B
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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