How It Works: 

Plan B One Step is a one tablet levonorgestrel hormone medication, used in many birth control pills. It contains a higher dose of levonorgestrel than birth control pills, but works in a similar way to prevent unintended pregnancy. The main action of Plan B is to stop the release of an egg from the ovary, but it is also possible that it may work to prevent fertilization of an egg or by preventing a fertilized egg from attaching (implanting) to the uterus. 

How It Is Taken:

The manufacturer claims the sooner you take Plan B One Step after unprotected sex or birth control failure the better it works. It can be taken up to 72 hours (3 days) after sex.

Effectiveness: 

The manufacturer states Plan B One Step can significantly reduce the chance you will become pregnant by as much as 87.5% if taken as directed; it is important to note that other studies have shown lower pregnancy reduction rates (higher rates of failure of Plan B’s intended function). 

Side Effects: 

Some women may experience nausea, vomiting, dizziness, fatigue, headache, breast tenderness, bleeding between periods or heavier menstrual bleeding and lower abdominal pain or cramps. If you have severe abdominal pain, you should get immediate medical attention to rule out an ectopic pregnancy.

How It Works:

ella (Ulipristal Acetate) is a one tablet medication that acts to prevent pregnancy by blocking the hormone progesterone similar to the abortion pill RU 486. It works mainly by stopping or delaying the ovaries from releasing an egg. It may also work by changing the lining of the uterus that may affect implantation of a fertilized embryo.

How It Is Taken:

The manufacturer claims it is best to take ella as soon as possible within 120 hours (5 days) after unprotected sex or failure of another birth control method.

Effectiveness:

Use as directed may reduce the chance of pregnancy. Two studies referenced in the packaging insert showed a reduced pregnancy rate, from an expected 5.5% to 2.2%, when taken 48 to 120 hours after unprotected intercourse.

Side Effects:

Some women may experience cramping, heavy bleeding, headache, nausea, abdominal pain, tiredness, and/or dizziness.

Taking an emergency contraceptive may not be effective or necessary for your situation. This is an important decision and we can help you to get the answers and information you need.